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8ad57737 | 1 | /*> gencode.c <*/ |
a647a859 JSC |
2 | /* Instruction handling support for the MIPS architecture simulator. |
3 | ||
4 | This file is part of the MIPS sim | |
5 | ||
6 | THIS SOFTWARE IS NOT COPYRIGHTED | |
7 | ||
8 | Cygnus offers the following for use in the public domain. Cygnus | |
9 | makes no warranty with regard to the software or it's performance | |
10 | and the user accepts the software "AS IS" with all faults. | |
11 | ||
12 | CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO | |
13 | THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
14 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
15 | ||
16 | $Revision$ | |
17 | $Author$ | |
18 | $Date$ | |
19 | */ | |
8ad57737 JSC |
20 | |
21 | #if 0 | |
22 | #define DEBUG (1) /* Just for testing */ | |
23 | #endif | |
24 | ||
25 | /* The Makefile currently defines "INSIDE_SIMULATOR" as part of the | |
26 | build. It is not currently used by the MIPS simulator world | |
27 | though. */ | |
28 | ||
29 | /* All output sent to stdout is for the simulator engine. All program | |
30 | related warnings and errors should be sent to stderr. */ | |
31 | ||
32 | /* The simulator decode table is constructed this way to allow the | |
33 | minimal code required for a particular instruction type to be | |
34 | coded. This avoids a large simulator source file, with lots of | |
35 | build-time conditionals controlling what code is included. However | |
36 | this two-stage process does mean that care must be taken to ensure | |
37 | that the correct decoding source is generated for a particular MIPS | |
38 | simulator. */ | |
39 | ||
40 | /* Notes: | |
41 | ||
42 | We could provide pipeline modelling by splitting the simulation of | |
43 | instructions into seperate bytecodes for each pipeline | |
44 | stage. e.g. for the VR4300 each instruction would generate 5 | |
45 | bytecodes, one for each pipeline stage. The simulator control would | |
46 | then insert these into the relevant pipeline slots, and execute a | |
47 | complete slots worth of bytecodes. However, the shape of the | |
48 | pipeline, and what parts of each instruction are executed in each | |
49 | pipeline stage, are different between MIPS implementations. If we | |
50 | were to construct a simulator for a particular MIPS architecture | |
51 | this would be a good solution. | |
52 | ||
53 | To avoid having to provide multiple different pipeline models, a | |
54 | simple approach for dealing with the delay slots, and register | |
55 | dependencies has been used. The "MIPS IV Instruction Set" document | |
56 | (Revision 3.1 - January 1995) details the standard MIPS instruction | |
57 | set, and it defines operations in instruction (not pipe-line) | |
58 | cycles. This means we only need to worry about a few cases where | |
59 | the result is not available until after the next instruction, or | |
60 | where registers in the previous two instruction cycles may be | |
61 | corrupted. The case for corruption only occurs with HI or LO | |
62 | register access, so we can just keep a count within the engine for | |
63 | upto two cycles before marking the register as safe. We then only | |
64 | need to check the safety flag when performing an update that | |
65 | involves the HI or LO register. The only other case is the | |
66 | BC1F/BC1T instructions in the FP unit. For ISAs I, II and III there | |
67 | must be an instruction between the FP CMP and the BC1[FT]. We can | |
68 | perform the same instruction cycle count scheme, so we can raise a | |
69 | warning if an attempt is made to access the condition code early | |
70 | (NOTE: The hardware does not interlock on this operation, so the | |
71 | simulator should just raise a warning). | |
72 | ||
73 | For the situations where a result is not available until later, we | |
74 | implent a slot to hold pending values. After the PC is incremented, | |
75 | and before the instruction is decoded we can execute the required | |
76 | register update (or remainder of instruction processing). */ | |
77 | ||
78 | /* The FP instruction decoding is also provided by this code. The | |
79 | instructions are marked as "FP" ones so that we can construct a | |
80 | simulator without an FPU if required. Similarly we mark | |
81 | instructions as Single or Double precision, since some MIPS | |
82 | processors only have single precision FP hardware. */ | |
83 | ||
84 | /* NOTE: Ideally all state should be passed as parameters. This allows | |
85 | a single simulator engine to be used for multiple concurrent | |
86 | simulations. More importantly, if a suitably powerful control is in | |
87 | place it will allow speculative simulation, since the context can | |
88 | be saved easily, and then restored after performing some | |
89 | simulation. The down-side is that for certain host architectures it | |
90 | can slow the simulator down (e.g. if globals can be accessed faster | |
91 | than local structures). However, this is not actually the case at | |
92 | the moment. The constructed engine uses direct names (that can be | |
93 | macro definitions). This keeps the engine source smalled (using | |
94 | short-hands), and it also allows the user to control whether they | |
95 | want to use global, or indirected memory locations. i.e. whether | |
96 | they want a single- or multi-threaded simulator engine. */ | |
97 | ||
98 | /* The constructed simulator engine contains manifests for each of the | |
99 | features supported. The code that includes the engine can then | |
100 | discover the available features during its build. This information | |
101 | can be used to control run-time features provided by the final | |
102 | simulator. */ | |
103 | ||
104 | /*---------------------------------------------------------------------------*/ | |
105 | ||
106 | /* Program defaults */ | |
107 | #define DEF_ISA (3) | |
108 | #define DEF_PROC64 (1 == 1) | |
109 | #define DEF_FP (1 == 1) | |
110 | #define DEF_FPSINGLE (1 == 0) | |
111 | ||
112 | #define FEATURE_PROC32 (1 << 0) /* 0 = 64bit; 1 = 32bit */ | |
113 | #define FEATURE_HASFPU (1 << 1) /* 0 = no FPU; 1 = include FPU */ | |
114 | #define FEATURE_FPSINGLE (1 << 1) /* 0 = double; 1 = single (only used if FEATURE_HASFPU defined) */ | |
115 | #define FEATURE_GP64 (1 << 2) /* 0 = GPRLEN 32; 1 = GPRLEN 64 */ | |
8ad57737 JSC |
116 | #define FEATURE_FAST (1 << 17) /* 0 = normal; 1 = disable features that slow performance */ |
117 | #define FEATURE_WARN_STALL (1 << 24) /* 0 = nothing; 1 = generate warnings when pipeline would stall */ | |
118 | #define FEATURE_WARN_LOHI (1 << 25) /* 0 = nothing; 1 = generate warnings when LO/HI corrupted */ | |
119 | #define FEATURE_WARN_ZERO (1 << 26) /* 0 = nothing; 1 = generate warnings if attempt to write register zero */ | |
120 | #define FEATURE_WARN_MEM (1 << 27) /* 0 = nothing; 1 = generate warnings when memory problems are noticed */ | |
121 | #define FEATURE_WARN_R31 (1 << 28) /* 0 = nothing; 1 = generate warnings if r31 used dangerously */ | |
122 | #define FEATURE_WARN_RESULT (1 << 29) /* 0 = nothing; 1 = generate warnings when undefined results may occur */ | |
123 | ||
8bae0a0c JSC |
124 | #if 1 |
125 | #define FEATURE_WARNINGS (FEATURE_WARN_STALL | FEATURE_WARN_LOHI | FEATURE_WARN_ZERO | FEATURE_WARN_R31) | |
126 | #else | |
8ad57737 | 127 | #define FEATURE_WARNINGS (FEATURE_WARN_STALL | FEATURE_WARN_LOHI | FEATURE_WARN_ZERO | FEATURE_WARN_R31 | FEATURE_WARN_RESULT) |
8bae0a0c | 128 | #endif |
8ad57737 JSC |
129 | |
130 | /* FEATURE_WARN_STALL */ | |
131 | /* If MIPS I we want to raise a warning if an attempt is made to | |
132 | access Rn in an instruction immediately following an Rn update | |
133 | "WARNING : Invalid value read". The simulator engine is designed | |
134 | that the previous value is read in such cases, to allow programs | |
135 | that make use of this feature to execute. * | |
136 | /* If MIPS II or later, attempting to read a register before the | |
137 | update has completed will generate a "WARNING : Processor stall" | |
138 | message (since the processor will lock the pipeline until the value | |
139 | becomes available). */ | |
140 | ||
141 | /* FEATURE_WARN_LOHI */ | |
142 | /* Warn if an attempt is made to read the HI/LO registers before the | |
143 | update has completed, or if an attempt is made to update the | |
144 | registers whilst an update is occurring. */ | |
145 | ||
146 | /* FEATURE_WARN_ZERO */ | |
147 | /* Notify the user if an attempt is made to use GPR 0 as a destination. */ | |
148 | ||
149 | /* FEATURE_WARN_R31 */ | |
150 | /* Notify the user if register r31 (the default procedure call return | |
151 | address) is used unwisely. e.g. If r31 is used as the source in a | |
152 | branch-and-link instruction, it would mean that an exception in the | |
153 | delay slot instruction would not allow the branch to be re-started | |
154 | (since r31 will have been overwritten by the link operation during | |
155 | the first execution of the branch). */ | |
156 | ||
157 | /* FEATURE_WARN_RESULT */ | |
158 | /* Certain instructions do not raise exceptions when invalid operands | |
159 | are given, they will just result in undefined values being | |
160 | generated. This option controls whether the simulator flags such | |
161 | events. */ | |
162 | ||
163 | /*---------------------------------------------------------------------------*/ | |
164 | ||
165 | #include <stdio.h> | |
166 | #include <getopt.h> | |
167 | #include <limits.h> | |
168 | #include <errno.h> | |
8bae0a0c | 169 | #include "opcode/mips.h" |
8ad57737 | 170 | |
8bae0a0c | 171 | /* The following manifests do not appear in "include/opcode/mips.h" */ |
8ad57737 JSC |
172 | #define OP_SH_LOCC (8) /* FP condition code */ |
173 | #define OP_SH_HICC (18) /* FP condition code */ | |
174 | #define OP_MASK_CC (0x07) | |
8bae0a0c JSC |
175 | |
176 | #define OP_SH_COP1NORM (25) /* Normal COP1 encoding */ | |
177 | #define OP_MASK_COP1NORM (0x01) /* a single bit */ | |
178 | #define OP_SH_COP1SPEC (21) /* Special COP1 encodings (within format field) */ | |
179 | #define OP_MASK_COP1SPEC (0x0F) /* Bits we are interested in */ | |
180 | #define OP_MASK_COP1SCLR (0x04) /* Bits to be explicitly cleared */ | |
181 | #define OP_MASK_COP1CMP (0x3) /* Unfortunately another conditional field needed to decode the FP instructions */ | |
182 | #define OP_SH_COP1CMP (4) | |
183 | ||
8ad57737 JSC |
184 | #define OP_SH_FORMAT (21) /* FP short format field */ |
185 | #define OP_MASK_FORMAT (0x07) | |
8bae0a0c | 186 | |
8ad57737 JSC |
187 | #define OP_SH_TRUE (16) |
188 | #define OP_MASK_TRUE (0x01) | |
8bae0a0c | 189 | |
8ad57737 JSC |
190 | #define OP_SH_GE (17) |
191 | #define OP_MASK_GE (0x01) | |
8bae0a0c | 192 | |
8ad57737 JSC |
193 | #define OP_SH_UNSIGNED (16) |
194 | #define OP_MASK_UNSIGNED (0x01) | |
8bae0a0c | 195 | |
8ad57737 JSC |
196 | #define OP_SH_HINT (16) |
197 | #define OP_MASK_HINT (0x1F) | |
198 | ||
8bae0a0c | 199 | #if 0 |
8ad57737 JSC |
200 | #ifndef TRUE |
201 | #define TRUE (1 == 1) | |
202 | #define FALSE (1 == 0) | |
203 | #endif | |
8bae0a0c | 204 | #endif |
8ad57737 JSC |
205 | |
206 | /*---------------------------------------------------------------------------*/ | |
207 | ||
208 | /* Holding the instruction table this way makes it easier to check the | |
209 | instruction values defined, and to add instructions to the | |
210 | system. However, it makes the process of constructing the simulator | |
211 | a bit more complicated: */ | |
212 | ||
213 | /* The "bitmap" is encoded as follows (NOTE: Only lower-case | |
214 | alphabetic characters should be used, since the letter ordinal is | |
215 | used as a bit position): */ | |
216 | ||
217 | typedef struct operand_encoding { | |
218 | char id; /* character identifier */ | |
219 | int fpos; /* first bit position */ | |
220 | int flen; /* field length in bits */ | |
221 | char * const type; | |
222 | char * const name; | |
223 | unsigned int flags; | |
224 | } operand_encoding; | |
225 | ||
226 | /* Values for the "flags" field: */ | |
227 | #define OP_NONE (0 << 0) /* To keep the source tidy */ | |
228 | #define OP_GPR (1 << 0) /* Get operand from integer register bank */ | |
8bae0a0c JSC |
229 | #define OP_SIGNX (1 << 1) /* Sign-extend the operand */ |
230 | #define OP_SHIFT2 (1 << 2) /* Shift field left by 2 */ | |
231 | #define OP_BITS5 (1 << 3) /* Only take the lo 5-bits of the operand */ | |
8ad57737 JSC |
232 | |
233 | struct operand_encoding opfields[] = { | |
8bae0a0c JSC |
234 | {'0',-1,-1,"", "", (OP_NONE)}, /* special case for explicit zero */ |
235 | {'1',-1,-1,"", "", (OP_NONE)}, /* special case for explicit one */ | |
236 | {'?',-1,-1,"", "", (OP_NONE)}, /* undefined (do not care at this level) */ | |
8ad57737 | 237 | /* The rest are the explicit operand fields: */ |
8bae0a0c JSC |
238 | {'a', 6, 5,"int", "op1", (OP_NONE)}, /* shift amount (or hint) */ |
239 | {'b',21, 5,"int", "fr", (OP_NONE)}, /* fr register */ | |
240 | {'c',16, 1,"int", "boolean", (OP_NONE)}, /* TRUE or FALSE boolean */ | |
241 | {'d',11, 5,"int", "destreg", (OP_NONE)}, /* integer destination/rd register */ | |
242 | {'e', 0,16,"t_reg", "offset", (OP_SIGNX)}, /* signed offset (lo-3bits must be zero) */ | |
243 | {'f',17, 1,"int", "likely", (OP_NONE)}, /* set if branch LIKELY */ | |
244 | {'g',16, 5,"t_reg", "op2", (OP_GPR)}, /* integer source rt register */ | |
245 | {'h', 0,16,"t_reg", "offset", (OP_SIGNX)}, /* signed offset (lo-1bit must be zero) */ | |
246 | {'i', 0,16,"t_reg", "op2", (OP_SIGNX)}, /* signed immediate (op2) */ | |
247 | {'j', 0,26,"ut_reg","op1", (OP_SHIFT2)},/* shifted left 2 bits and combined with hi-order bits of address in the delay slot */ | |
248 | {'k',16, 5,"int", "ft", (OP_NONE)}, | |
249 | {'l', 0,16,"t_reg", "offset", (OP_SIGNX | OP_SHIFT2)}, /* signed offset shifted left 2 to make 18bit signed offset */ | |
250 | {'m',21, 3,"int", "format", (OP_NONE)}, /* FP format field */ | |
251 | {'n',16, 5,"int", "hint", (OP_NONE)}, /* hint */ | |
252 | {'o',21, 5,"t_reg", "op1", (OP_GPR | OP_BITS5)}, /* integer source/rs register (but never treated as 32bit word) */ | |
253 | {'p', 8, 3,"int", "condition_code",(OP_NONE)}, /* FP condition code field */ | |
254 | {'q',18, 3,"int", "condition_code",(OP_NONE)}, /* FP condition code field */ | |
255 | {'r', 6, 5,"int", "destreg", (OP_NONE)}, /* FP fd register */ | |
256 | {'s',21, 5,"t_reg", "op1", (OP_GPR)}, /* integer source/rs register */ | |
257 | {'t',16, 5,"int", "destreg", (OP_NONE)}, /* integer target rt (destination) register */ | |
258 | {'u', 0, 4,"int", "cmpflags", (OP_NONE)}, /* FP comparison control flags */ | |
259 | {'v',11, 5,"int", "fs", (OP_NONE)}, /* FP fs register (or PREFX hint) */ | |
260 | {'w', 0,16,"t_reg", "offset", (OP_SIGNX)}, /* signed offset (lo-2bits must be zero) */ | |
261 | {'x',23, 1,"int", "to", (OP_NONE)}, /* TRUE if move To; FALSE if move From */ | |
262 | {'y', 0,16,"t_reg", "offset", (OP_SIGNX)}, /* signed offset */ | |
263 | {'z', 0,16,"ut_reg","op2", (OP_NONE)}, /* unsigned immediate (zero extended) */ | |
8ad57737 JSC |
264 | }; |
265 | ||
266 | /* Main instruction encoding types: */ | |
267 | typedef enum { | |
268 | NORMAL, | |
269 | SPECIAL, | |
270 | REGIMM, | |
271 | COP1, | |
272 | COP1X, | |
8bae0a0c | 273 | COP1S, /* These instructions live in the reserved FP format values: 0..15,18-19,22-31 */ |
8ad57737 JSC |
274 | UNKNOWN |
275 | } inst_type; | |
276 | ||
277 | /* Main instruction families: */ | |
278 | typedef enum { | |
279 | ADD, /* res = operand1 + operand2 */ | |
280 | SUB, /* res = operand1 - operand2 */ | |
281 | MUL, /* res = operand1 * operand2 */ | |
282 | DIV, /* res = operand1 / operand2 */ | |
283 | AND, /* res = operand1 & operand2 */ | |
284 | OR, /* res = operand1 | operand2 */ | |
285 | XOR, /* res = operand1 ^ operand2 */ | |
286 | MOVE, /* res = operand1 */ | |
287 | BRANCH, /* execute delay slot instruction before branch unless (LIKELY && branch_not_taken) */ | |
288 | JUMP, /* execute delay slot instruction before jump */ | |
289 | LOAD, /* load from memory */ | |
290 | STORE, /* store to memory */ | |
291 | PREFETCH, /* prefetch data into cache */ | |
292 | SET, /* set register on result of condition code */ | |
293 | SHIFT, /* perform a logical or arithmetic shift */ | |
294 | TRAP, /* system exception generation */ | |
295 | BREAK, /* system breakpoint exception generation */ | |
296 | SYSCALL, /* system exception generation */ | |
297 | SYNC, /* system cache control */ | |
298 | DECODE, /* co-processor instruction */ | |
299 | CACHE, /* co-processor 0 CACHE instruction */ | |
300 | MADD16, /* VR4100 specific multiply-add extensions */ | |
301 | FPMOVE, | |
8bae0a0c | 302 | FPMOVEC, |
8ad57737 JSC |
303 | FPFLOOR, |
304 | FPCEIL, | |
305 | FPTRUNC, | |
306 | FPROUND, | |
307 | FPNEG, | |
308 | FPABS, | |
309 | FPDIV, | |
310 | FPMUL, | |
311 | FPSUB, | |
312 | FPADD, | |
8ad57737 | 313 | FPPREFX, |
8ad57737 JSC |
314 | FPRECIP, |
315 | FPSQRT, | |
316 | FPCONVERT, | |
317 | FPCOMPARE, | |
318 | RSVD /* "Reserved Instruction" on MIPS IV, or if co-proc 3 absent. Otherwise "Reserved Instruction" */ | |
319 | } opcode_type; | |
320 | ||
321 | /* Flags field: */ | |
322 | #define NONE (0 << 0) /* Zero value (used to keep source tidy) */ | |
323 | #define SIM_SH_SIZE (0) | |
8bae0a0c JSC |
324 | #define SIM_MASK_SIZE (0x7) |
325 | #define BYTE (0) /* 8bit */ | |
326 | #define HALFWORD (1) /* 16bit */ | |
327 | #define WORD (2) /* 32bit */ | |
328 | #define DOUBLEWORD (3) /* 64bit */ | |
329 | #define SINGLE (4) /* single precision FP */ | |
330 | #define DOUBLE (5) /* double precision FP */ | |
8ad57737 JSC |
331 | |
332 | /* Shorthand to get the size field from the flags value: */ | |
333 | #define GETDATASIZE() ((MIPS_DECODE[loop].flags >> SIM_SH_SIZE) & SIM_MASK_SIZE) | |
334 | ||
335 | /* The rest are single bit flags: */ | |
8ad57737 JSC |
336 | #define MULTIPLY (1 << 3) /* actually FP multiply ADD/SUB modifier */ |
337 | #define EQ (1 << 4) | |
338 | #define GT (1 << 5) | |
339 | #define LT (1 << 6) | |
340 | #define NOT (1 << 7) | |
341 | #define LIKELY (1 << 8) | |
342 | #define SIGNEXTEND (1 << 9) | |
343 | #define OVERFLOW (1 << 10) | |
344 | #define LINK (1 << 11) | |
345 | #define ATOMIC (1 << 12) | |
346 | #define SHIFT16 (1 << 13) | |
347 | #define REG (1 << 14) | |
348 | #define LEFT (1 << 15) /* Deliberate explicit encodings to allow check for neither, or both */ | |
349 | #define RIGHT (1 << 16) /* Mutually exclusive with "LEFT" */ | |
350 | #define LOGICAL (1 << 17) | |
351 | #define ARITHMETIC (1 << 18) | |
352 | #define UNSIGNED (1 << 19) | |
353 | #define HI32 (1 << 20) | |
354 | #define HI (1 << 21) /* accesses or updates the HI register */ | |
355 | #define LO (1 << 22) /* accesses or updates the LO register */ | |
356 | #define WORD32 (1 << 23) | |
357 | #define FP (1 << 24) /* Floating Point operation */ | |
358 | #define FIXED (1 << 25) /* fixed point arithmetic */ | |
8bae0a0c JSC |
359 | #define COPROC (1 << 26) |
360 | #define INTEGER (1 << 27) | |
361 | #define CONDITIONAL (1 << 28) | |
362 | #define RECIP (1 << 29) | |
363 | #define CONTROL (1 << 30) | |
8ad57737 | 364 | #define NOARG (1 << 31) /* Instruction has no (defined) operands */ |
8bae0a0c JSC |
365 | /* NOTE: We can overload the use of certain of these flags, since not |
366 | all options are applicable to all instruction types. This will free | |
367 | up more space for new flags. */ | |
8ad57737 JSC |
368 | |
369 | typedef struct instruction { | |
370 | char *name; /* ASCII mnemonic name */ | |
371 | unsigned int isa; /* MIPS ISA number where instruction introduced */ | |
372 | char *bitmap; /* 32character string describing instruction operands */ | |
373 | inst_type mark; /* type of MIPS instruction encoding */ | |
374 | opcode_type type; /* main instruction family */ | |
375 | unsigned int flags; /* flags describing instruction features */ | |
376 | } instruction; | |
377 | /* The number of pipeline cycles taken by an instruction varies | |
378 | between MIPS processors. This means that the information must be | |
379 | encoded elsewhere, in a CPU specific structure. */ | |
380 | ||
381 | /* NOTE: Undefined instructions cause "Reserved Instruction" | |
382 | exceptions. i.e. if there is no bit-mapping defined then the | |
383 | instruction is deemed to be undefined. */ | |
384 | ||
385 | /* NOTE: The "isa" field is also used to encode flags for particular | |
386 | chip architecture extensions. e.g. the NEC VR4100 specific | |
387 | instructions. Normally chip extensions are added via the COP0 | |
388 | space. However, the VR4100 (and possibly other devices) also use | |
389 | the normal instruction space. */ | |
390 | #define MASK_ISA (0x000000FF) /* Start by leaving 8bits for the ISA ID */ | |
391 | /* The other bits are allocated downwards, to avoid renumbering if we | |
392 | have to extend the bits allocated to the pure ISA number. */ | |
393 | #define ARCH_VR4100 ((unsigned)1 << 31) /* NEC VR4100 extension instructions */ | |
394 | ||
395 | /* The HIBERNATE, STANDBY and SUSPEND instructions are encoded in the | |
396 | COP0 space. This means that an external decoder should be added | |
397 | when constructing a full VR4100 simulator. However some arithmetic | |
398 | instructions are encoded in the normal instruction space. */ | |
399 | ||
400 | struct instruction MIPS_DECODE[] = { | |
401 | /* The instructions are alphabetical, and not in instruction bit-order: */ | |
a9f7253f | 402 | {"ABS", 1,"01000110mmm00000vvvvvrrrrr000101",COP1, FPABS, (FP)}, |
8ad57737 | 403 | {"ADD", 1,"000000sssssgggggddddd00000100000",SPECIAL,ADD, (WORD | WORD32 | OVERFLOW)}, /* rd = rs + rt */ |
8bae0a0c | 404 | {"ADD", 1,"01000110mmmkkkkkvvvvvrrrrr000000",COP1, FPADD, (FP)}, |
8ad57737 JSC |
405 | {"ADDI", 1,"001000ssssstttttiiiiiiiiiiiiiiii",NORMAL, ADD, (WORD | WORD32 | OVERFLOW)}, |
406 | {"ADDU", 1,"000000sssssgggggddddd00000100001",SPECIAL,ADD, (WORD | WORD32)}, /* rd = rs + rt */ | |
407 | {"ADDIU", 1,"001001ssssstttttiiiiiiiiiiiiiiii",NORMAL, ADD, (WORD | WORD32)}, | |
408 | {"AND", 1,"000000sssssgggggddddd00000100100",SPECIAL,AND, (NONE)}, /* rd = rs AND rt */ | |
409 | {"ANDI", 1,"001100ssssstttttzzzzzzzzzzzzzzzz",NORMAL, AND, (NONE)}, | |
8bae0a0c | 410 | {"BC1", 1,"01000101000qqqfcllllllllllllllll",COP1S, BRANCH, (FP)}, |
8ad57737 JSC |
411 | {"BEQ", 1,"000100sssssgggggllllllllllllllll",NORMAL, BRANCH, (EQ)}, |
412 | {"BEQL", 2,"010100sssssgggggllllllllllllllll",NORMAL, BRANCH, (EQ | LIKELY)}, | |
413 | {"BGEZ", 1,"000001sssss00001llllllllllllllll",REGIMM, BRANCH, (GT | EQ)}, | |
414 | {"BGEZAL", 1,"000001sssss10001llllllllllllllll",REGIMM, BRANCH, (GT | EQ | LINK)}, | |
415 | {"BGEZALL", 2,"000001sssss10011llllllllllllllll",REGIMM, BRANCH, (GT | EQ | LINK)}, | |
416 | {"BGEZL", 2,"000001sssss00011llllllllllllllll",REGIMM, BRANCH, (GT | EQ | LIKELY)}, | |
417 | {"BGTZ", 1,"000111sssss00000llllllllllllllll",NORMAL, BRANCH, (GT)}, | |
418 | {"BGTZL", 2,"010111sssss00000llllllllllllllll",NORMAL, BRANCH, (GT | LIKELY)}, | |
419 | {"BLEZ", 1,"000110sssss00000llllllllllllllll",NORMAL, BRANCH, (LT | EQ)}, | |
420 | {"BLEZL", 2,"010110sssss00000llllllllllllllll",NORMAL, BRANCH, (LT | EQ | LIKELY)}, | |
421 | {"BLTZ", 1,"000001sssss00000llllllllllllllll",REGIMM, BRANCH, (LT)}, | |
422 | {"BLTZAL", 1,"000001sssss10000llllllllllllllll",REGIMM, BRANCH, (LT | LINK)}, | |
423 | {"BLTZALL", 2,"000001sssss10010llllllllllllllll",REGIMM, BRANCH, (LT | LINK | LIKELY)}, | |
424 | {"BLTZL", 2,"000001sssss00010llllllllllllllll",REGIMM, BRANCH, (LT | LIKELY)}, | |
425 | {"BNE", 1,"000101sssssgggggllllllllllllllll",NORMAL, BRANCH, (NOT | EQ)}, | |
426 | {"BNEL", 2,"010101sssssgggggllllllllllllllll",NORMAL, BRANCH, (NOT | EQ | LIKELY)}, | |
427 | {"BREAK", 1,"000000????????????????????001101",SPECIAL,BREAK, (NOARG)}, | |
428 | {"CEIL.L", 3,"01000110mmm00000vvvvvrrrrr001010",COP1, FPCEIL, (FP | FIXED | DOUBLEWORD)}, | |
429 | {"CEIL.W", 2,"01000110mmm00000vvvvvrrrrr001110",COP1, FPCEIL, (FP | FIXED | WORD)}, | |
430 | {"COP0", 1,"010000??????????????????????????",NORMAL, DECODE, (NOARG)}, | |
431 | {"COP2", 1,"010010??????????????????????????",NORMAL, DECODE, (NOARG)}, | |
432 | {"CVT.D", 1,"01000110mmm00000vvvvvrrrrr100001",COP1, FPCONVERT,(FP | DOUBLE)}, | |
433 | {"CVT.L", 3,"01000110mmm00000vvvvvrrrrr100101",COP1, FPCONVERT,(FP | FIXED | DOUBLEWORD)}, | |
434 | {"CVT.S", 1,"01000110mmm00000vvvvvrrrrr100000",COP1, FPCONVERT,(FP | SINGLE)}, | |
435 | {"CVT.W", 1,"01000110mmm00000vvvvvrrrrr100100",COP1, FPCONVERT,(FP | FIXED | WORD)}, | |
436 | {"C.%s", 1,"01000110mmmkkkkkvvvvvppp0011uuuu",COP1, FPCOMPARE,(FP)}, | |
8bae0a0c | 437 | {"CxC1", 1,"01000100x10kkkkkvvvvv00000000000",COP1S, FPMOVEC, (FP | WORD | CONTROL)}, |
8ad57737 JSC |
438 | {"DADD", 3,"000000sssssgggggddddd00000101100",SPECIAL,ADD, (DOUBLEWORD | OVERFLOW)}, |
439 | {"DADDI", 3,"011000ssssstttttiiiiiiiiiiiiiiii",NORMAL, ADD, (DOUBLEWORD | OVERFLOW)}, | |
440 | {"DADDU", 3,"000000sssssgggggddddd00000101101",SPECIAL,ADD, (DOUBLEWORD | UNSIGNED)}, | |
441 | {"DADDIU", 3,"011001ssssstttttiiiiiiiiiiiiiiii",NORMAL, ADD, (DOUBLEWORD | UNSIGNED)}, | |
442 | {"DDIV", 3,"000000sssssggggg0000000000011110",SPECIAL,DIV, (DOUBLEWORD | HI | LO)}, | |
443 | {"DDIVU", 3,"000000sssssggggg0000000000011111",SPECIAL,DIV, (DOUBLEWORD | UNSIGNED | HI | LO)}, | |
444 | {"DIV", 1,"000000sssssggggg0000000000011010",SPECIAL,DIV, (WORD | WORD32 | SIGNEXTEND | HI | LO)}, | |
445 | {"DIV", 1,"01000110mmmkkkkkvvvvvrrrrr000011",COP1, FPDIV, (FP | WORD | HI | LO)}, | |
446 | {"DIVU", 1,"000000sssssggggg0000000000011011",SPECIAL,DIV, (WORD | WORD32 | UNSIGNED | SIGNEXTEND | HI | LO)}, | |
447 | {"DMADD16", (ARCH_VR4100 | 3),"000000sssssggggg0000000000101001",SPECIAL,MADD16, (DOUBLEWORD | HI | LO)}, | |
448 | {"DMULT", 3,"000000sssssggggg0000000000011100",SPECIAL,MUL, (DOUBLEWORD | HI | LO)}, | |
449 | {"DMULTU", 3,"000000sssssggggg0000000000011101",SPECIAL,MUL, (DOUBLEWORD | UNSIGNED | HI | LO)}, | |
8bae0a0c | 450 | {"DMxC1", 3,"01000100x01kkkkkvvvvv00000000000",COP1S, FPMOVEC, (FP | DOUBLEWORD)}, |
8ad57737 JSC |
451 | {"DSLL", 3,"00000000000gggggdddddaaaaa111000",SPECIAL,SHIFT, (DOUBLEWORD | LEFT | LOGICAL)}, |
452 | {"DSLLV", 3,"000000sssssgggggddddd00000010100",SPECIAL,SHIFT, (DOUBLEWORD | LEFT | LOGICAL)}, | |
453 | {"DSLL32", 3,"00000000000gggggdddddaaaaa111100",SPECIAL,SHIFT, (DOUBLEWORD | LEFT | LOGICAL | HI32)}, /* rd = rt << (sa + 32) */ | |
454 | {"DSRA", 3,"00000000000gggggdddddaaaaa111011",SPECIAL,SHIFT, (DOUBLEWORD | RIGHT | ARITHMETIC)}, | |
455 | {"DSRAV", 3,"000000sssssgggggddddd00000010111",SPECIAL,SHIFT, (DOUBLEWORD | RIGHT | ARITHMETIC)}, | |
456 | {"DSRA32", 3,"00000000000gggggdddddaaaaa111111",SPECIAL,SHIFT, (DOUBLEWORD | RIGHT | ARITHMETIC | HI32)}, /* rd = rt >> (sa + 32) */ | |
457 | {"DSRL", 3,"00000000000gggggdddddaaaaa111010",SPECIAL,SHIFT, (DOUBLEWORD | RIGHT | LOGICAL)}, | |
458 | {"DSRLV", 3,"000000sssssgggggddddd00000010110",SPECIAL,SHIFT, (DOUBLEWORD | RIGHT | LOGICAL)}, | |
459 | {"DSRL32", 3,"00000000000gggggdddddaaaaa111110",SPECIAL,SHIFT, (DOUBLEWORD | RIGHT | LOGICAL | HI32)}, | |
460 | {"DSUB", 3,"000000sssssgggggddddd00000101110",SPECIAL,SUB, (DOUBLEWORD)}, | |
461 | {"DSUBU", 3,"000000sssssgggggddddd00000101111",SPECIAL,SUB, (DOUBLEWORD | UNSIGNED)}, | |
462 | {"FLOOR.L", 3,"01000110mmm00000vvvvvrrrrr001011",COP1, FPFLOOR, (FP | FIXED | DOUBLEWORD)}, | |
463 | {"FLOOR.W", 2,"01000110mmm00000vvvvvrrrrr001111",COP1, FPFLOOR, (FP | FIXED | WORD)}, | |
464 | {"J", 1,"000010jjjjjjjjjjjjjjjjjjjjjjjjjj",NORMAL, JUMP, (NONE)}, /* NOTE: boundary case due to delay slot address being used */ | |
465 | {"JAL", 1,"000011jjjjjjjjjjjjjjjjjjjjjjjjjj",NORMAL, JUMP, (LINK)}, /* NOTE: boundary case due to delay slot address being used */ | |
466 | {"JALR", 1,"000000sssss00000ddddd00000001001",SPECIAL,JUMP, (LINK | REG)}, | |
467 | {"JR", 1,"000000sssss000000000000000001000",SPECIAL,JUMP, (NONE)}, /* need to check PC as part of instruction fetch */ | |
468 | {"LB", 1,"100000ssssstttttyyyyyyyyyyyyyyyy",NORMAL, LOAD, (BYTE | SIGNEXTEND)}, /* NOTE: "i" rather than "o" because BYTE addressing is allowed */ | |
469 | {"LBU", 1,"100100ssssstttttyyyyyyyyyyyyyyyy",NORMAL, LOAD, (BYTE)}, /* NOTE: See "LB" comment */ | |
470 | {"LD", 3,"110111sssssttttteeeeeeeeeeeeeeee",NORMAL, LOAD, (DOUBLEWORD)}, | |
471 | {"LDC1", 2,"110101sssssttttteeeeeeeeeeeeeeee",NORMAL, LOAD, (DOUBLEWORD | COPROC)}, | |
472 | {"LDC2", 2,"110110sssssttttteeeeeeeeeeeeeeee",NORMAL, LOAD, (DOUBLEWORD | COPROC)}, | |
473 | {"LDL", 3,"011010ssssstttttyyyyyyyyyyyyyyyy",NORMAL, LOAD, (DOUBLEWORD | LEFT)}, /* NOTE: See "LB" comment */ | |
474 | {"LDR", 3,"011011ssssstttttyyyyyyyyyyyyyyyy",NORMAL, LOAD, (DOUBLEWORD | RIGHT)}, /* NOTE: See "LB" comment */ | |
8bae0a0c | 475 | {"LDXC1", 4,"010011sssssggggg00000rrrrr000001",COP1X, LOAD, (FP | DOUBLEWORD | COPROC | REG)}, |
8ad57737 JSC |
476 | {"LH", 1,"100001sssssttttthhhhhhhhhhhhhhhh",NORMAL, LOAD, (HALFWORD | SIGNEXTEND)}, |
477 | {"LHU", 1,"100101sssssttttthhhhhhhhhhhhhhhh",NORMAL, LOAD, (HALFWORD)}, | |
478 | {"LL", 2,"110000ssssstttttwwwwwwwwwwwwwwww",NORMAL, LOAD, (WORD | ATOMIC | SIGNEXTEND)}, | |
479 | {"LLD", 3,"110100sssssttttteeeeeeeeeeeeeeee",NORMAL, LOAD, (DOUBLEWORD | ATOMIC)}, | |
480 | {"LUI", 1,"00111100000tttttiiiiiiiiiiiiiiii",NORMAL, MOVE, (SHIFT16)}, /* Cheat and specify sign-extension of immediate field */ | |
481 | {"LW", 1,"100011ssssstttttwwwwwwwwwwwwwwww",NORMAL, LOAD, (WORD | SIGNEXTEND)}, | |
482 | {"LWC1", 1,"110001ssssstttttwwwwwwwwwwwwwwww",NORMAL, LOAD, (WORD | COPROC)}, | |
483 | {"LWC2", 1,"110010ssssstttttwwwwwwwwwwwwwwww",NORMAL, LOAD, (WORD | COPROC)}, | |
484 | {"LWL", 1,"100010ssssstttttyyyyyyyyyyyyyyyy",NORMAL, LOAD, (WORD | LEFT)}, | |
485 | {"LWR", 1,"100110ssssstttttyyyyyyyyyyyyyyyy",NORMAL, LOAD, (WORD | RIGHT)}, | |
486 | {"LWU", 3,"100111ssssstttttwwwwwwwwwwwwwwww",NORMAL, LOAD, (WORD)}, | |
8bae0a0c | 487 | {"LWXC1", 4,"010011sssssggggg00000rrrrr000000",COP1X, LOAD, (FP | WORD | COPROC | REG)}, |
8ad57737 JSC |
488 | {"MADD16", (ARCH_VR4100 | 3),"000000sssssggggg0000000000101000",SPECIAL,MADD16, (WORD | HI | LO)}, |
489 | {"MADD.D", 4,"010011bbbbbkkkkkvvvvvrrrrr100001",COP1X, FPADD, (FP | MULTIPLY | DOUBLE)}, | |
490 | {"MADD.S", 4,"010011bbbbbkkkkkvvvvvrrrrr100000",COP1X, FPADD, (FP | MULTIPLY | SINGLE)}, | |
491 | {"MFHI", 1,"0000000000000000ddddd00000010000",SPECIAL,MOVE, (HI)}, /* with following, from and to denoted by usage of "s" or "d" */ | |
492 | {"MFLO", 1,"0000000000000000ddddd00000010010",SPECIAL,MOVE, (LO)}, | |
493 | {"MTHI", 1,"000000sssss000000000000000010001",SPECIAL,MOVE, (HI)}, | |
494 | {"MTLO", 1,"000000sssss000000000000000010011",SPECIAL,MOVE, (LO)}, | |
495 | {"MOV", 1,"01000110mmm00000vvvvvrrrrr000110",COP1, FPMOVE, (FP)}, | |
496 | {"MOVN", 4,"000000sssssgggggddddd00000001011",SPECIAL,MOVE, (NOT | EQ)}, | |
8bae0a0c JSC |
497 | {"MOVN", 4,"01000110mmmgggggvvvvvrrrrr010011",COP1, FPMOVE, (FP | NOT | EQ)}, |
498 | {"MOV%c", 4,"000000sssssqqq0cddddd00000000001",SPECIAL,FPMOVE, (FP | CONDITIONAL | INTEGER)}, | |
499 | {"MOV%c", 4,"01000110mmmqqq0cvvvvvrrrrr010001",COP1, FPMOVE, (FP | CONDITIONAL)}, | |
8ad57737 | 500 | {"MOVZ", 4,"000000sssssgggggddddd00000001010",SPECIAL,MOVE, (EQ)}, |
8bae0a0c | 501 | {"MOVZ", 4,"01000110mmmgggggvvvvvrrrrr010010",COP1, FPMOVE, (FP | EQ)}, |
8ad57737 JSC |
502 | {"MSUB.D", 4,"010011bbbbbkkkkkvvvvvrrrrr101001",COP1X, FPSUB, (FP | MULTIPLY | DOUBLE)}, |
503 | {"MSUB.S", 4,"010011bbbbbkkkkkvvvvvrrrrr101000",COP1X, FPSUB, (FP | MULTIPLY | SINGLE)}, | |
504 | {"MUL", 1,"01000110mmmkkkkkvvvvvrrrrr000010",COP1, FPMUL, (FP | HI | LO)}, | |
505 | {"MULT", 1,"000000sssssggggg0000000000011000",SPECIAL,MUL, (WORD | WORD32 | HI | LO)}, | |
506 | {"MULTU", 1,"000000sssssggggg0000000000011001",SPECIAL,MUL, (WORD | WORD32 | HI | LO)}, | |
8bae0a0c JSC |
507 | {"MxC1", 1,"01000100x00kkkkkvvvvv00000000000",COP1S, FPMOVEC, (FP | WORD)}, |
508 | {"NEG", 1,"01000110mmm00000vvvvvrrrrr000111",COP1, FPNEG, (FP)}, | |
8ad57737 JSC |
509 | {"NMADD.D", 4,"010011bbbbbkkkkkvvvvvrrrrr110001",COP1X, FPADD, (FP | NOT | MULTIPLY | DOUBLE)}, |
510 | {"NMADD.S", 4,"010011bbbbbkkkkkvvvvvrrrrr110000",COP1X, FPADD, (FP | NOT | MULTIPLY | SINGLE)}, | |
511 | {"NMSUB.D", 4,"010011bbbbbkkkkkvvvvvrrrrr111001",COP1X, FPSUB, (FP | NOT | MULTIPLY | DOUBLE)}, | |
512 | {"NMSUB.S", 4,"010011bbbbbkkkkkvvvvvrrrrr111000",COP1X, FPSUB, (FP | NOT | MULTIPLY | SINGLE)}, | |
513 | {"NOR", 1,"000000sssssgggggddddd00000100111",SPECIAL,OR, (NOT)}, | |
514 | {"OR", 1,"000000sssssgggggddddd00000100101",SPECIAL,OR, (NONE)}, | |
515 | {"ORI", 1,"001101ssssstttttzzzzzzzzzzzzzzzz",NORMAL, OR, (NONE)}, | |
516 | {"PREF", 4,"110011sssssnnnnnyyyyyyyyyyyyyyyy",NORMAL, PREFETCH, (NONE)}, | |
8bae0a0c | 517 | {"PREFX", 4,"010011sssssgggggvvvvv00000001111",COP1X, FPPREFX, (FP)}, |
8ad57737 JSC |
518 | {"RECIP", 4,"01000110mmm00000vvvvvrrrrr010101",COP1, FPRECIP, (FP)}, |
519 | {"ROUND.L", 3,"01000110mmm00000vvvvvrrrrr001000",COP1, FPROUND, (FP | FIXED | DOUBLEWORD)}, | |
520 | {"ROUND.W", 2,"01000110mmm00000vvvvvrrrrr001100",COP1, FPROUND, (FP | FIXED | WORD)}, | |
8bae0a0c | 521 | {"RSQRT", 4,"01000110mmm00000vvvvvrrrrr010110",COP1, FPSQRT, (FP | RECIP)}, |
8ad57737 JSC |
522 | {"SB", 1,"101000sssssgggggyyyyyyyyyyyyyyyy",NORMAL, STORE, (BYTE)}, |
523 | {"SC", 2,"111000sssssgggggwwwwwwwwwwwwwwww",NORMAL, STORE, (WORD | ATOMIC)}, | |
524 | {"SCD", 3,"111100sssssgggggeeeeeeeeeeeeeeee",NORMAL, STORE, (DOUBLEWORD | ATOMIC)}, | |
525 | {"SD", 3,"111111sssssgggggeeeeeeeeeeeeeeee",NORMAL, STORE, (DOUBLEWORD)}, | |
526 | {"SDC1", 2,"111101sssssttttteeeeeeeeeeeeeeee",NORMAL, STORE, (DOUBLEWORD | COPROC)}, | |
527 | {"SDC2", 2,"111110sssssttttteeeeeeeeeeeeeeee",NORMAL, STORE, (DOUBLEWORD | COPROC)}, | |
528 | {"SDL", 3,"101100sssssgggggyyyyyyyyyyyyyyyy",NORMAL, STORE, (DOUBLEWORD | LEFT)}, | |
529 | {"SDR", 3,"101101sssssgggggyyyyyyyyyyyyyyyy",NORMAL, STORE, (DOUBLEWORD | RIGHT)}, | |
8bae0a0c | 530 | {"SDXC1", 4,"010011sssssgggggvvvvv00000001001",COP1X, STORE, (FP | DOUBLEWORD | COPROC | REG)}, |
8ad57737 JSC |
531 | {"SH", 1,"101001sssssggggghhhhhhhhhhhhhhhh",NORMAL, STORE, (HALFWORD)}, |
532 | {"SLL", 1,"00000000000gggggdddddaaaaa000000",SPECIAL,SHIFT, (WORD | LEFT | LOGICAL)}, /* rd = rt << sa */ | |
533 | {"SLLV", 1,"000000ooooogggggddddd00000000100",SPECIAL,SHIFT, (WORD | LEFT | LOGICAL)}, /* rd = rt << rs - with "SLL" depends on "s" and "a" field values */ | |
534 | {"SLT", 1,"000000sssssgggggddddd00000101010",SPECIAL,SET, (LT)}, | |
535 | {"SLTI", 1,"001010ssssstttttiiiiiiiiiiiiiiii",NORMAL, SET, (LT)}, | |
536 | {"SLTU", 1,"000000sssssgggggddddd00000101011",SPECIAL,SET, (LT | UNSIGNED)}, | |
537 | {"SLTIU", 1,"001011ssssstttttiiiiiiiiiiiiiiii",NORMAL, SET, (LT | UNSIGNED)}, | |
538 | {"SQRT", 2,"01000110mmm00000vvvvvrrrrr000100",COP1, FPSQRT, (FP)}, | |
8bae0a0c JSC |
539 | {"SRA", 1,"00000000000gggggdddddaaaaa000011",SPECIAL,SHIFT, (WORD | WORD32 | RIGHT | ARITHMETIC)}, |
540 | {"SRAV", 1,"000000ooooogggggddddd00000000111",SPECIAL,SHIFT, (WORD | WORD32 | RIGHT | ARITHMETIC)}, | |
541 | {"SRL", 1,"00000000000gggggdddddaaaaa000010",SPECIAL,SHIFT, (WORD | WORD32 | RIGHT | LOGICAL)}, | |
542 | {"SRLV", 1,"000000ooooogggggddddd00000000110",SPECIAL,SHIFT, (WORD | WORD32 | RIGHT | LOGICAL)}, | |
8ad57737 JSC |
543 | {"SUB", 1,"000000sssssgggggddddd00000100010",SPECIAL,SUB, (WORD | WORD32 | OVERFLOW)}, |
544 | {"SUB", 1,"01000110mmmkkkkkvvvvvrrrrr000001",COP1, FPSUB, (FP)}, | |
545 | {"SUBU", 1,"000000sssssgggggddddd00000100011",SPECIAL,SUB, (WORD | WORD32)}, | |
546 | {"SW", 1,"101011sssssgggggwwwwwwwwwwwwwwww",NORMAL, STORE, (WORD)}, | |
547 | {"SWC1", 1,"111001ssssstttttwwwwwwwwwwwwwwww",NORMAL, STORE, (WORD | COPROC)}, | |
548 | {"SWC2", 1,"111010ssssstttttwwwwwwwwwwwwwwww",NORMAL, STORE, (WORD | COPROC)}, | |
549 | {"SWL", 1,"101010sssssgggggyyyyyyyyyyyyyyyy",NORMAL, STORE, (WORD | LEFT)}, | |
550 | {"SWR", 1,"101110sssssgggggyyyyyyyyyyyyyyyy",NORMAL, STORE, (WORD | RIGHT)}, | |
8bae0a0c | 551 | {"SWXC1", 4,"010011sssssgggggvvvvv00000001000",COP1X, STORE, (FP | WORD | COPROC | REG)}, |
8ad57737 JSC |
552 | {"SYNC", 2,"000000000000000000000aaaaa001111",SPECIAL,SYNC, (NONE)}, /* z = 5bit stype field */ |
553 | {"SYSCALL", 1,"000000????????????????????001100",SPECIAL,SYSCALL, (NOARG)}, | |
554 | {"TEQ", 2,"000000sssssggggg??????????110100",SPECIAL,TRAP, (EQ)}, | |
555 | {"TEQI", 2,"000001sssss01100iiiiiiiiiiiiiiii",REGIMM, TRAP, (EQ)}, | |
556 | {"TGE", 2,"000000sssssggggg??????????110000",SPECIAL,TRAP, (GT | EQ)}, | |
557 | {"TGEI", 2,"000001sssss01000iiiiiiiiiiiiiiii",REGIMM, TRAP, (GT | EQ)}, | |
558 | {"TGEIU", 2,"000001sssss01001iiiiiiiiiiiiiiii",REGIMM, TRAP, (GT | EQ | UNSIGNED)}, | |
559 | {"TGEU", 2,"000000sssssggggg??????????110001",SPECIAL,TRAP, (GT | EQ | UNSIGNED)}, | |
560 | {"TLT", 2,"000000sssssggggg??????????110010",SPECIAL,TRAP, (LT)}, | |
561 | {"TLTI", 2,"000001sssss01010iiiiiiiiiiiiiiii",REGIMM, TRAP, (LT)}, | |
562 | {"TLTIU", 2,"000001sssss01011iiiiiiiiiiiiiiii",REGIMM, TRAP, (LT | UNSIGNED)}, | |
563 | {"TLTU", 2,"000000sssssggggg??????????110011",SPECIAL,TRAP, (LT | UNSIGNED)}, | |
564 | {"TNE", 2,"000000sssssggggg??????????110110",SPECIAL,TRAP, (NOT | EQ)}, | |
565 | {"TNEI", 2,"000001sssss01110iiiiiiiiiiiiiiii",REGIMM, TRAP, (NOT | EQ)}, | |
566 | {"TRUNC.L", 3,"01000110mmm00000vvvvvrrrrr001001",COP1, FPTRUNC, (FP | FIXED | DOUBLEWORD)}, | |
567 | {"TRUNC.W", 2,"01000110mmm00000vvvvvrrrrr001101",COP1, FPTRUNC, (FP | FIXED | WORD)}, | |
568 | {"XOR", 1,"000000sssssgggggddddd00000100110",SPECIAL,XOR, (NONE)}, | |
569 | {"XORI", 1,"001110ssssstttttzzzzzzzzzzzzzzzz",NORMAL, XOR, (NONE)}, | |
570 | {"CACHE", 3,"101111sssssnnnnnyyyyyyyyyyyyyyyy",NORMAL, CACHE, (NONE)}, | |
571 | {"<INT>", 1,"111011sssssgggggyyyyyyyyyyyyyyyy",NORMAL, RSVD, (NONE)}, | |
572 | }; | |
573 | ||
574 | /*---------------------------------------------------------------------------*/ | |
575 | ||
576 | /* We use the letter ordinal as the bit-position in our flags field: */ | |
577 | #define fieldval(l) (1 << ((l) - 'a')) | |
578 | ||
579 | unsigned int | |
580 | convert_bitmap(bitmap,onemask,zeromask,dontmask) | |
581 | char *bitmap; | |
582 | unsigned int *onemask, *zeromask, *dontmask; | |
583 | { | |
584 | unsigned int flags = 0x00000000; | |
585 | int loop; /* current bitmap position */ | |
586 | int lastsp = -1; /* last bitmap field starting position */ | |
587 | int lastoe = -1; /* last bitmap field encoding */ | |
588 | ||
589 | *onemask = 0x00000000; | |
590 | *zeromask = 0x00000000; | |
591 | *dontmask = 0x00000000; | |
592 | ||
593 | if (strlen(bitmap) != 32) { | |
594 | fprintf(stderr,"Invalid bitmap string - not 32 characters long \"%s\"\n",bitmap); | |
595 | exit(3); | |
596 | } | |
597 | ||
598 | for (loop = 0; (loop < 32); loop++) { | |
599 | int oefield ; | |
600 | for (oefield = 0; (oefield < (sizeof(opfields) / sizeof(struct operand_encoding))); oefield++) | |
601 | if (bitmap[31 - loop] == opfields[oefield].id) | |
602 | break; | |
603 | if (oefield < (sizeof(opfields) / sizeof(struct operand_encoding))) { | |
604 | if ((lastoe != -1) && (lastoe != oefield)) | |
605 | if ((loop - lastsp) != (opfields[lastoe].flen)) { | |
8bae0a0c | 606 | fprintf(stderr,"Invalid field length %d for bitmap field '%c' (0x%02X) (should be %d) : bitmap = \"%s\"\n",(loop - lastsp),(((bitmap[31 - loop] < 0x20) || (bitmap[31 - loop] >= 0x7F)) ? '.' : bitmap[31 - loop]),bitmap[31 - loop],opfields[lastoe].flen,bitmap); |
8ad57737 JSC |
607 | exit(4); |
608 | } | |
609 | ||
610 | switch (bitmap[31 - loop]) { | |
611 | case '0' : /* fixed value */ | |
612 | *zeromask |= (1 << loop); | |
613 | lastsp = loop; | |
614 | lastoe = -1; | |
615 | break; | |
616 | ||
617 | case '1' : /* fixed value */ | |
618 | *onemask |= (1 << loop); | |
619 | lastsp = loop; | |
620 | lastoe = -1; | |
621 | break; | |
622 | ||
623 | case '?' : /* fixed value */ | |
624 | *dontmask |= (1 << loop); | |
625 | lastsp = loop; | |
626 | lastoe = -1; | |
627 | break; | |
628 | ||
629 | default : /* check character encoding */ | |
630 | { | |
631 | if (opfields[oefield].fpos != -1) { | |
632 | /* If flag not set, then check starting position: */ | |
633 | if (!(flags & fieldval(bitmap[31 - loop]))) { | |
634 | if (loop != opfields[oefield].fpos) { | |
635 | fprintf(stderr,"Bitmap field '%c' (0x%02X) at wrong offset %d in bitmap \"%s\"\n",(((bitmap[31 - loop] < 0x20) || (bitmap[31 - loop] >= 0x7F)) ? '.' : bitmap[31 - loop]),bitmap[31 - loop],loop,bitmap); | |
636 | exit(4); | |
637 | } | |
638 | flags |= fieldval(bitmap[31 - loop]); | |
639 | lastsp = loop; | |
640 | lastoe = oefield; | |
641 | } | |
642 | } | |
643 | *dontmask |= (1 << loop); | |
644 | } | |
645 | break; | |
646 | } | |
647 | } else { | |
648 | fprintf(stderr,"Unrecognised bitmap character '%c' (0x%02X) at offset %d in bitmap \"%s\"\n",(((bitmap[31 - loop] < 0x20) || (bitmap[31 - loop] >= 0x7F)) ? '.' : bitmap[31 - loop]),bitmap[31 - loop],loop,bitmap); | |
649 | exit(4); | |
650 | } | |
651 | } | |
652 | ||
653 | /* NOTE: Since we check for the position and size of fields when | |
654 | parsing the "bitmap" above, we do *NOT* need to check that invalid | |
655 | field combinations have been used. */ | |
656 | ||
657 | return(flags); | |
658 | } | |
659 | ||
660 | /*---------------------------------------------------------------------------*/ | |
661 | ||
662 | static void | |
663 | build_operands(flags) | |
664 | unsigned int flags; | |
665 | { | |
666 | int loop; | |
667 | for (loop = 0; (loop < (sizeof(opfields) / sizeof(operand_encoding))); loop++) | |
668 | if ((opfields[loop].fpos != -1) && (flags & fieldval(opfields[loop].id))) { | |
669 | printf(" %s %s = ",opfields[loop].type,opfields[loop].name); | |
670 | ||
671 | if (opfields[loop].flags & OP_SIGNX) | |
672 | printf("SIGNEXTEND((%s)",opfields[loop].type); | |
673 | ||
8bae0a0c JSC |
674 | if (opfields[loop].flags & OP_GPR) |
675 | printf("GPR["); | |
8ad57737 JSC |
676 | |
677 | if (opfields[loop].flags & OP_SHIFT2) | |
678 | printf("("); | |
679 | ||
680 | printf("((instruction >> %d) & 0x%08X)",opfields[loop].fpos,((1 << opfields[loop].flen) - 1)); | |
681 | ||
682 | if (opfields[loop].flags & OP_SHIFT2) | |
683 | printf(" << 2)"); | |
684 | ||
8bae0a0c | 685 | if (opfields[loop].flags & OP_GPR) |
8ad57737 JSC |
686 | printf("]"); |
687 | ||
688 | if (opfields[loop].flags & OP_BITS5) | |
689 | printf("&0x1F"); | |
690 | ||
691 | if (opfields[loop].flags & OP_SIGNX) | |
692 | printf(",%d)",(opfields[loop].flen + ((opfields[loop].flags & OP_SHIFT2) ? 2 : 0))); | |
693 | ||
694 | printf(";\n"); | |
695 | } | |
696 | ||
697 | return; | |
698 | } | |
699 | ||
e871dd18 JSC |
700 | /*---------------------------------------------------------------------------*/ |
701 | ||
702 | typedef enum { | |
703 | s_left, | |
704 | s_right | |
705 | } e_endshift; | |
706 | ||
707 | static void | |
708 | build_endian_shift(proc64,datalen,endbit,direction,shift) | |
709 | int proc64; | |
710 | int datalen; | |
711 | int endbit; | |
712 | e_endshift direction; | |
713 | int shift; | |
714 | { | |
715 | if (proc64 && (datalen == 4)) { | |
716 | printf(" if ((vaddr & (1 << %d)) ^ (BigEndianCPU << %d)) {\n",endbit,endbit); | |
717 | printf(" memval %s= %d;\n",direction == s_left ? "<<" : ">>",shift); | |
718 | printf(" }\n"); | |
719 | } | |
720 | ||
721 | return; | |
722 | } | |
723 | ||
8ad57737 JSC |
724 | /*---------------------------------------------------------------------------*/ |
725 | /* doisa = number of MIPS ISA simulator table is being constructed for. | |
726 | * proc64 = TRUE if constructing 64bit processor world. | |
727 | * dofp = boolean, TRUE if FP instructions are to be included. | |
728 | * fpsingle = boolean, TRUE if only single precision FP instructions to be included. | |
729 | */ | |
730 | ||
731 | void | |
732 | process_instructions(doarch,features) | |
733 | unsigned int doarch; | |
734 | unsigned int features; | |
735 | { | |
736 | int doisa = (doarch & MASK_ISA); | |
737 | int limit = (sizeof(MIPS_DECODE) / sizeof(instruction)); | |
738 | int gprlen=((features & FEATURE_GP64) ? 64 : 32); | |
8ad57737 JSC |
739 | int proc64 = ((features & FEATURE_PROC32) ? 0 : -1); |
740 | int dofp = (features & FEATURE_HASFPU); | |
741 | int fpsingle = (features & FEATURE_FPSINGLE); | |
8bae0a0c | 742 | int maxisa; |
8ad57737 JSC |
743 | int loop; |
744 | ||
745 | if (limit < 1) { | |
746 | fprintf(stderr,"process_instructions: invalid structure length\n"); | |
747 | exit(1); | |
748 | } | |
749 | ||
750 | if (proc64 && (gprlen != 64)) { | |
751 | fprintf(stderr,"Error: 64bit processor build specified, with MIPS ISA I or II\n"); | |
752 | exit(3); | |
753 | } | |
754 | ||
8ad57737 JSC |
755 | /* NOTE: "proc64" also differentiates between 32- and 64-bit wide memory */ |
756 | ||
8bae0a0c JSC |
757 | maxisa = 0; |
758 | for (loop = 0; (loop < limit); loop++) | |
759 | if ((MIPS_DECODE[loop].isa & MASK_ISA) > maxisa) | |
760 | maxisa = (MIPS_DECODE[loop].isa & MASK_ISA); | |
761 | ||
762 | if (doisa == 0) | |
763 | doisa = maxisa; | |
764 | ||
8ad57737 | 765 | printf("#if defined(SIM_MANIFESTS)\n"); |
8bae0a0c | 766 | printf("#define MIPSISA (%d)\n",doisa); |
8ad57737 JSC |
767 | if (proc64) |
768 | printf("#define PROCESSOR_64BIT (1 == 1)\n"); | |
c98ec95d JSC |
769 | else |
770 | printf("#define PROCESSOR_64BIT (1 == 0)\n"); | |
771 | #if 1 /* cheat: We only have a 64bit LoadMemory and StoreMemory routines at the moment */ | |
772 | printf("#define LOADDRMASK (0x%08X)\n",0x7); | |
773 | #else | |
8ad57737 | 774 | printf("#define LOADDRMASK (0x%08X)\n",(proc64 ? 0x7 : 0x3)); |
c98ec95d | 775 | #endif |
8bae0a0c | 776 | /* The FP registers are the same width as the CPU registers: */ |
8ad57737 | 777 | printf("#define GPRLEN (%d)\n",gprlen); |
8ad57737 JSC |
778 | printf("typedef %s t_reg;\n",((gprlen == 64) ? "word64" : "int")); |
779 | printf("typedef %s ut_reg;\n",((gprlen == 64) ? "uword64" : "unsigned int")); | |
8bae0a0c | 780 | printf("typedef %s t_fpreg;\n",((gprlen == 64) ? "word64" : "int")); |
8ad57737 JSC |
781 | if (dofp) |
782 | printf("#define HASFPU (1 == 1)\n"); | |
783 | if (features & FEATURE_FAST) | |
784 | printf("#define FASTSIM (1 == 1)\n"); | |
785 | if (features & FEATURE_WARN_STALL) | |
786 | printf("#define WARN_STALL (1 == 1)\n"); | |
787 | if (features & FEATURE_WARN_LOHI) | |
788 | printf("#define WARN_LOHI (1 == 1)\n"); | |
789 | if (features & FEATURE_WARN_ZERO) | |
790 | printf("#define WARN_ZERO (1 == 1)\n"); | |
791 | if (features & FEATURE_WARN_MEM) | |
792 | printf("#define WARN_MEM (1 == 1)\n"); | |
793 | if (features & FEATURE_WARN_R31) | |
794 | printf("#define WARN_R31 (1 == 1)\n"); | |
795 | if (features & FEATURE_WARN_RESULT) | |
796 | printf("#define WARN_RESULT (1 == 1)\n"); | |
797 | ||
798 | printf("#else /* simulator engine */\n"); | |
799 | ||
800 | printf("/* Engine generated by \"%s\" at %s */\n","<SHOW PROGRAM ARGS>","<SHOW CURRENT DATE AND TIME>"); | |
801 | printf("/* Main instruction decode for %d-bit MIPS ISA %d (Table entry limit = %d) */\n",(proc64 ? 64 : 32),doisa,limit); | |
802 | if (dofp) | |
803 | printf("/* %sFP instructions included */\n",(fpsingle ? "Single precision " : "")); | |
804 | printf("/* NOTE: \"DSPC\" is the delay slot PC address */\n"); | |
805 | ||
806 | if (proc64) { | |
807 | printf("#if !defined(PROCESSOR_64BIT)\n"); | |
808 | printf("#error \"Automatically constructed decoder has been built for a 64bit processor\"\n"); | |
809 | printf("#endif\n"); | |
810 | } | |
811 | ||
812 | printf("/* Actual instruction decoding block */\n"); | |
813 | printf("{\n"); | |
8bae0a0c JSC |
814 | { |
815 | int limit; | |
816 | printf("int num = ((instruction >> %d) & 0x%08X);\n",OP_SH_OP,OP_MASK_OP); | |
817 | limit = (OP_MASK_OP + 1); | |
818 | printf("if (num == 0x00) num = (%d + ((instruction >> %d) & 0x%08X));\n",limit,OP_SH_SPEC,OP_MASK_SPEC); | |
819 | limit += (OP_MASK_SPEC + 1); | |
820 | printf("else if (num == 0x01) num = (%d + ((instruction >> %d) & 0x%08X));\n",limit,OP_SH_RT,OP_MASK_RT); | |
821 | limit += (OP_MASK_RT + 1); | |
822 | printf("else if (num == 0x11) {\n"); | |
823 | printf(" if ((instruction & (0x%08X << %d)) == 0x%08X)\n",OP_MASK_COP1NORM,OP_SH_COP1NORM,(OP_MASK_COP1NORM << OP_SH_COP1NORM)); | |
824 | printf(" if ((instruction & (0x%08X << %d)) == 0x%08X)\n",OP_MASK_COP1CMP,OP_SH_COP1CMP,(OP_MASK_COP1CMP << OP_SH_COP1CMP)); | |
825 | printf(" num = (%d + ((instruction >> %d) & 0x%08X));\n",limit,OP_SH_SPEC,(OP_MASK_SPEC & (OP_MASK_COP1CMP << OP_SH_COP1CMP))); | |
826 | printf(" else\n"); | |
827 | printf(" num = (%d + ((instruction >> %d) & 0x%08X));\n",limit,OP_SH_SPEC,OP_MASK_SPEC); | |
828 | limit += (OP_MASK_SPEC + 1); | |
829 | printf(" else\n"); | |
830 | /* To keep this code quick, we just clear out the "to" bit | |
831 | here. The proper (though slower) code would be to have another | |
832 | conditional, checking whether this instruction is a branch or | |
833 | not, before limiting the range to the bottom two bits of the | |
834 | move operation. */ | |
835 | printf(" num = (%d + (((instruction >> %d) & 0x%08X) & ~0x%08X));\n",limit,OP_SH_COP1SPEC,OP_MASK_COP1SPEC,OP_MASK_COP1SCLR); | |
836 | limit += (OP_MASK_COP1SPEC + 1); | |
837 | printf("} else if (num == 0x13) num = (%d + ((instruction >> %d) & 0x%08X));\n",limit,OP_SH_SPEC,OP_MASK_SPEC); | |
838 | limit += (OP_MASK_SPEC + 1); | |
839 | printf("/* Total possible switch entries: %d */\n",limit) ; | |
840 | } | |
8ad57737 JSC |
841 | printf("switch (num)\n") ; |
842 | printf("{\n"); | |
843 | ||
a9f7253f | 844 | for (loop = 0; (loop < limit); loop++) { |
8ad57737 JSC |
845 | /* First check that the ISA number we are constructing for is |
846 | valid, before checking if the instruction matches any of the | |
847 | architecture specific flags. NOTE: We allow a selected ISA of | |
848 | zero to be used to match all standard instructions. */ | |
8bae0a0c | 849 | if ((((MIPS_DECODE[loop].isa & MASK_ISA) <= doisa) && (((MIPS_DECODE[loop].isa & ~MASK_ISA) == 0) || ((MIPS_DECODE[loop].isa & ~MASK_ISA) & doarch) != 0)) && (!(MIPS_DECODE[loop].flags & FP) || ((MIPS_DECODE[loop].flags & FP) && dofp))) { |
8ad57737 JSC |
850 | unsigned int onemask; |
851 | unsigned int zeromask; | |
852 | unsigned int dontmask; | |
853 | unsigned int mask; | |
854 | unsigned int number; | |
855 | unsigned int flags = convert_bitmap(MIPS_DECODE[loop].bitmap,&onemask,&zeromask,&dontmask); | |
856 | char *regtype = ((gprlen == 64) ? "uword64" : "unsigned int"); | |
857 | ||
c98ec95d | 858 | if (!(MIPS_DECODE[loop].flags & COPROC) && ((GETDATASIZE() == DOUBLEWORD) && !proc64)) { |
8ad57737 JSC |
859 | fprintf(stderr,"DOUBLEWORD width specified for non 64-bit processor for instruction \"%s\"\n",MIPS_DECODE[loop].name); |
860 | exit(4); | |
861 | } | |
862 | ||
863 | #if defined(DEBUG) | |
864 | printf("/* DEBUG: onemask 0x%08X */\n",onemask) ; | |
865 | printf("/* DEBUG: zeromask 0x%08X */\n",zeromask) ; | |
866 | printf("/* DEBUG: dontmask 0x%08X */\n",dontmask) ; | |
867 | #endif | |
868 | ||
869 | switch (MIPS_DECODE[loop].mark) { | |
870 | case NORMAL : | |
871 | mask = (OP_MASK_OP << OP_SH_OP) ; | |
872 | number = ((onemask >> OP_SH_OP) & OP_MASK_OP) ; | |
873 | break ; | |
874 | ||
875 | case SPECIAL : | |
876 | mask = ((OP_MASK_OP << OP_SH_OP) | (OP_MASK_SPEC << OP_SH_SPEC)) ; | |
877 | number = ((OP_MASK_OP + 1) + ((onemask >> OP_SH_SPEC) & OP_MASK_SPEC)) ; | |
878 | break ; | |
879 | ||
880 | case REGIMM : | |
881 | mask = ((OP_MASK_OP << OP_SH_OP) | (OP_MASK_RT << OP_SH_RT)) ; | |
882 | number = (((OP_MASK_OP + 1) + (OP_MASK_SPEC + 1)) + ((onemask >> OP_SH_RT) & OP_MASK_RT)) ; | |
883 | break ; | |
884 | ||
885 | case COP1 : | |
886 | mask = ((OP_MASK_OP << OP_SH_OP) | (OP_MASK_SPEC << OP_SH_SPEC)) ; | |
887 | number = (((OP_MASK_OP + 1) + (OP_MASK_SPEC + 1) + (OP_MASK_RT + 1)) + ((onemask >> OP_SH_SPEC) & OP_MASK_SPEC)) ; | |
888 | break ; | |
889 | ||
8bae0a0c JSC |
890 | case COP1S : |
891 | mask = ((OP_MASK_OP << OP_SH_OP) | (OP_MASK_COP1SPEC << OP_SH_COP1SPEC)) ; | |
892 | number = (((OP_MASK_OP + 1) + (OP_MASK_SPEC + 1) + (OP_MASK_RT + 1) + (OP_MASK_SPEC + 1)) + ((onemask >> OP_SH_COP1SPEC) & OP_MASK_COP1SPEC)) ; | |
893 | break; | |
894 | ||
8ad57737 JSC |
895 | case COP1X : |
896 | mask = ((OP_MASK_OP << OP_SH_OP) | (OP_MASK_SPEC << OP_SH_SPEC)) ; | |
8bae0a0c | 897 | number = (((OP_MASK_OP + 1) + (OP_MASK_SPEC + 1) + (OP_MASK_RT + 1) + (OP_MASK_COP1SPEC + 1) + (OP_MASK_SPEC + 1)) + ((onemask >> OP_SH_SPEC) & OP_MASK_SPEC)) ; |
8ad57737 JSC |
898 | break ; |
899 | ||
900 | default : | |
901 | fprintf(stderr,"Unrecognised opcode mark %d in table slot %d \"%s\"\n",MIPS_DECODE[loop].mark,loop,MIPS_DECODE[loop].name) ; | |
902 | exit(5) ; | |
903 | } | |
904 | ||
905 | printf("case %d : /* \"%s\" %s */\n",number,MIPS_DECODE[loop].name,MIPS_DECODE[loop].bitmap) ; | |
906 | ||
907 | #if defined(DEBUG) | |
908 | printf("/* DEBUG: mask 0x%08X */\n",mask) ; | |
909 | printf(" printf(\"\\\"%s\\\"\\n\");\n",MIPS_DECODE[loop].name); | |
910 | #endif | |
911 | ||
912 | /* Check if there are any other explicit bits in the instruction: */ | |
913 | if ((~mask & (onemask | zeromask)) != 0x00000000) { | |
914 | printf(" if ((instruction & 0x%08X) != 0x%08X)\n",(onemask | zeromask),onemask) ; | |
915 | printf(" {\n") ; | |
916 | printf(" SignalException(ReservedInstruction,instruction);\n") ; | |
917 | printf(" }\n") ; | |
918 | printf(" else\n") ; | |
919 | } | |
920 | ||
921 | if ((flags == 0) && !(MIPS_DECODE[loop].flags & NOARG)) { | |
922 | fprintf(stderr,"Bitmap error: Instruction with no operand fields \"%s\"\n",MIPS_DECODE[loop].name) ; | |
923 | exit(5) ; | |
924 | } | |
925 | ||
926 | printf(" {\n") ; | |
927 | ||
928 | /* Get hold of the operands */ | |
929 | /* NOTE: If we wanted to make the simulator code smaller, we | |
930 | * could pull these into a common sequence before we perform | |
931 | * the instruction decoding. However, this would affect the | |
932 | * performance since unnecessary field extraction would be | |
933 | * occurring for certain instructions. | |
934 | * | |
935 | * Also we do not perform checking for multiple definitions of a | |
936 | * particular operand here, since they are caught by the | |
937 | * compilation of the produced code. | |
938 | */ | |
939 | build_operands(flags); | |
940 | ||
941 | /* Finish constructing the jump address if required: */ | |
942 | if (flags & fieldval('j')) | |
943 | printf(" op1 |= (PC & ~0x0FFFFFFF); /* address of instruction in delay slot for the jump */\n"); | |
944 | ||
945 | /* Now perform required operand checks: */ | |
946 | ||
947 | /* The following code has been removed, since it seems perfectly | |
948 | reasonable to have a non-aligned offset that is added to another | |
949 | non-aligned base to create an aligned address. Some more | |
950 | information on exactly what the MIPS IV specification requires is | |
951 | needed before deciding on the best strategy. Experimentation with a | |
952 | VR4300 suggests that we do not need to raise the warning. */ | |
953 | #if 0 | |
954 | /* For MIPS IV (and onwards), certain instruction operand values | |
955 | will give undefined results. For the simulator we could | |
956 | generate explicit exceptions (i.e. ReservedInstruction) to | |
957 | make it easier to spot invalid use. However, for the moment we | |
958 | just raise a warning. NOTE: This is a different check to the | |
959 | later decoding, which checks for the final address being | |
960 | valid. */ | |
8bae0a0c | 961 | if ((flags & (fieldval('e') | fieldval('w') | fieldval('h'))) && (doisa >= 4)) { |
8ad57737 JSC |
962 | printf(" if (instruction & 0x%1X)\n",((flags & fieldval('e')) ? 0x7 : ((flags & fieldval('w')) ? 0x3 : 0x1))); |
963 | printf(" {\n"); | |
964 | /* NOTE: If we change this to a SignalException(), we must | |
965 | ensure that the following opcode processing is not | |
966 | executed. i.e. the code falls straight out to the simulator | |
967 | control loop. */ | |
968 | printf(" WARNING(\"Instruction has lo-order offset bits set in instruction\");\n"); | |
969 | printf(" }\n"); | |
970 | } | |
971 | #endif | |
972 | ||
973 | /* The extended condition codes only appeared in ISA IV */ | |
8bae0a0c | 974 | if ((flags & fieldval('p')) && (doisa < 4)) { |
8ad57737 JSC |
975 | printf(" if (condition_code != 0)\n"); |
976 | printf(" {\n"); | |
977 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
978 | printf(" }\n"); | |
979 | printf(" else\n"); | |
980 | } | |
981 | ||
982 | if ((MIPS_DECODE[loop].flags & WORD32) && (GETDATASIZE() != WORD)) { | |
983 | fprintf(stderr,"Error in opcode table: WORD32 set for non-WORD opcode\n"); | |
984 | exit(1); | |
985 | } | |
986 | ||
8bae0a0c JSC |
987 | #if 1 |
988 | /* The R4000 book differs slightly from the MIPS IV ISA | |
989 | manual. An example is the sign-extension of a 64-bit processor | |
990 | SUBU operation, and what is meant by an Undefined Result. This | |
991 | is now provided purely as a warning. After examining a HW | |
992 | implementation, this is now purely a warning... and the actual | |
993 | operation is performed, with possibly undefined results. */ | |
994 | if (((MIPS_DECODE[loop].flags & WORD32) && proc64) && (features & FEATURE_WARN_RESULT)) { | |
995 | /* The compiler should optimise out an OR with zero */ | |
996 | printf(" if (%s | %s)\n",((flags & fieldval('s')) ? "NOTWORDVALUE(op1)" : "0"),((flags & fieldval('g')) ? "NOTWORDVALUE(op2)" : "0")); | |
997 | printf(" UndefinedResult();\n") ; | |
998 | } | |
999 | #else | |
8ad57737 JSC |
1000 | /* Check that the source is a 32bit value */ |
1001 | if ((MIPS_DECODE[loop].flags & WORD32) && proc64) { | |
8bae0a0c | 1002 | /* The compiler should optimise out an OR with zero */ |
8ad57737 JSC |
1003 | printf(" if (%s | %s)\n",((flags & fieldval('s')) ? "NOTWORDVALUE(op1)" : "0"),((flags & fieldval('g')) ? "NOTWORDVALUE(op2)" : "0")); |
1004 | printf(" UndefinedResult();\n") ; | |
1005 | printf(" else\n") ; | |
1006 | } | |
8bae0a0c | 1007 | #endif |
8ad57737 JSC |
1008 | |
1009 | printf(" {\n") ; | |
1010 | ||
1011 | switch (MIPS_DECODE[loop].type) { | |
1012 | /* TODO: To make these easier to edit and maintain, they should | |
1013 | actually be provided as source macros (or inline functions) | |
8bae0a0c JSC |
1014 | OUTSIDE this main switch statement. The PPC simulator has a |
1015 | neater scheme for describing the instruction sequences. */ | |
8ad57737 JSC |
1016 | |
1017 | case ADD: | |
8bae0a0c | 1018 | case SUB: |
8ad57737 | 1019 | { |
4fa14cf7 SG |
1020 | char *signed_basetype = "unknown"; |
1021 | char *unsigned_basetype = "unknown"; | |
1022 | ||
8ad57737 JSC |
1023 | switch (GETDATASIZE()) { |
1024 | case WORD : | |
4fa14cf7 SG |
1025 | signed_basetype = "signed int"; |
1026 | unsigned_basetype = "unsigned int"; | |
8ad57737 JSC |
1027 | break; |
1028 | case DOUBLEWORD : | |
4fa14cf7 SG |
1029 | signed_basetype = "word64"; |
1030 | unsigned_basetype = "uword64"; | |
8ad57737 JSC |
1031 | break; |
1032 | default : | |
8bae0a0c | 1033 | fprintf(stderr,"Opcode table error: size of ADD/SUB operands not known (%d)\n",GETDATASIZE()); |
8ad57737 JSC |
1034 | exit(1); |
1035 | } | |
1036 | ||
1037 | if ((MIPS_DECODE[loop].type) == ADD) { | |
4fa14cf7 SG |
1038 | printf(" %s temp = (%s)(op1 + op2);\n", unsigned_basetype, unsigned_basetype); |
1039 | printf(" %s tempS = (%s)temp;\n", signed_basetype, signed_basetype); | |
8bae0a0c JSC |
1040 | if (MIPS_DECODE[loop].flags & OVERFLOW) { |
1041 | printf(" if (((op1 < 0) == (op2 < 0)) && ((tempS < 0) != (op1 < 0)))\n"); | |
1042 | printf(" SignalException(IntegerOverflow);\n"); | |
1043 | printf(" else\n"); | |
1044 | } | |
8ad57737 JSC |
1045 | if (!proc64 || (MIPS_DECODE[loop].flags & UNSIGNED) || (GETDATASIZE() == DOUBLEWORD)) |
1046 | printf(" GPR[destreg] = (%s)temp;\n",regtype); | |
1047 | else /* only sign-extend when placing 32bit result in 64bit processor */ | |
1048 | printf(" GPR[destreg] = SIGNEXTEND(((%s)temp),32);\n",regtype); | |
1049 | } else { /* SUB */ | |
4fa14cf7 SG |
1050 | printf(" %s temp = (%s)(op1 - op2);\n", unsigned_basetype, unsigned_basetype); |
1051 | printf(" %s tempS = (%s)temp;\n", signed_basetype, signed_basetype); | |
8ad57737 JSC |
1052 | if (MIPS_DECODE[loop].flags & OVERFLOW) { /* different signs => overflow if result_sign != arg_sign */ |
1053 | printf(" if (((op1 < 0) != (op2 < 0)) && ((tempS < 0) == (op1 < 0)))\n"); | |
1054 | printf(" SignalException(IntegerOverflow);\n"); | |
1055 | printf(" else\n"); | |
1056 | } | |
1057 | /* UNSIGNED 32bit operations on a 64bit processor should | |
1058 | *STILL* be sign-extended. We have cheated in the | |
1059 | data-structure, by not marking it with UNSIGNED, and not | |
1060 | setting OVERFLOW. */ | |
1061 | if (!proc64 || (MIPS_DECODE[loop].flags & UNSIGNED) || (GETDATASIZE() == DOUBLEWORD)) | |
1062 | printf(" GPR[destreg] = (%s)temp;\n",regtype); | |
1063 | else /* only sign-extend when placing 32bit result in 64bit processor */ | |
1064 | printf(" GPR[destreg] = SIGNEXTEND(((%s)temp),32);\n",regtype); | |
1065 | } | |
1066 | } | |
1067 | break ; | |
1068 | ||
8bae0a0c | 1069 | case MUL: |
8ad57737 JSC |
1070 | if (features & FEATURE_WARN_LOHI) { |
1071 | printf(" CHECKHILO(\"Multiplication\");\n"); | |
1072 | } | |
1073 | printf(" {\n"); | |
1074 | if (GETDATASIZE() == DOUBLEWORD) { | |
1075 | printf(" uword64 mid;\n"); | |
1076 | printf(" uword64 temp;\n"); | |
a647a859 JSC |
1077 | printf(" LO = ((uword64)WORD64LO(op1) * WORD64LO(op2));\n"); |
1078 | printf(" HI = ((uword64)WORD64HI(op1) * WORD64HI(op2));\n"); | |
1079 | printf(" mid = ((uword64)WORD64HI(op1) * WORD64LO(op2));\n"); | |
1080 | printf(" temp = (LO + SET64HI(WORD64LO(mid)));\n"); | |
8ad57737 JSC |
1081 | printf(" if ((temp == mid) ? (LO != 0) : (temp < mid))\n"); |
1082 | printf(" HI += 1;\n"); | |
a647a859 JSC |
1083 | printf(" HI += WORD64HI(mid);\n"); |
1084 | printf(" mid = ((uword64)WORD64LO(op1) * WORD64HI(op2));\n"); | |
1085 | printf(" LO = (temp + SET64HI(WORD64LO(mid)));\n"); | |
8ad57737 JSC |
1086 | printf(" if ((LO == mid) ? (temp != 0) : (LO < mid))\n"); |
1087 | printf(" HI += 1;\n"); | |
a647a859 | 1088 | printf(" HI += WORD64HI(mid);\n"); |
8ad57737 JSC |
1089 | } else { |
1090 | printf(" uword64 temp = (op1 * op2);\n"); | |
a647a859 JSC |
1091 | printf(" LO = SIGNEXTEND((%s)WORD64LO(temp),32);\n",regtype); |
1092 | printf(" HI = SIGNEXTEND((%s)WORD64HI(temp),32);\n",regtype); | |
8ad57737 JSC |
1093 | } |
1094 | printf(" }\n"); | |
1095 | break ; | |
1096 | ||
8bae0a0c | 1097 | case DIV: |
8ad57737 JSC |
1098 | { |
1099 | int boolU = (MIPS_DECODE[loop].flags & UNSIGNED); | |
1100 | ||
1101 | if (features & FEATURE_WARN_LOHI) { | |
1102 | printf(" CHECKHILO(\"Division\");\n"); | |
1103 | } | |
1104 | printf(" {\n"); | |
1105 | if (GETDATASIZE() == DOUBLEWORD) { | |
e871dd18 JSC |
1106 | printf(" LO = ((%sword64)op1 / (%sword64)op2);\n",(boolU ? "u" : ""),(boolU ? "u" : "")); |
1107 | printf(" HI = ((%sword64)op1 %c (%sword64)op2);\n",(boolU ? "u" : ""),'%',(boolU ? "u" : "")); | |
8ad57737 JSC |
1108 | } else { |
1109 | printf(" LO = SIGNEXTEND(((%sint)op1 / (%sint)op2),32);\n",(boolU ? "unsigned " : ""),(boolU ? "unsigned " : "")); | |
1110 | printf(" HI = SIGNEXTEND(((%sint)op1 %c (%sint)op2),32);\n",(boolU ? "unsigned " : ""),'%',(boolU ? "unsigned " : "")); | |
1111 | } | |
1112 | printf(" }\n"); | |
1113 | } | |
1114 | break ; | |
1115 | ||
8bae0a0c | 1116 | case SHIFT: |
8ad57737 JSC |
1117 | { |
1118 | int datalen = GETDATASIZE(); | |
1119 | int bits = ((datalen == WORD) ? 32 : 64); | |
1120 | char *ltype = ((datalen == WORD) ? "unsigned int" : "uword64"); | |
1121 | ||
1122 | /* Check that the specified SHIFT is valid: */ | |
1123 | if ((datalen == BYTE) || (datalen == HALFWORD)) { | |
1124 | fprintf(stderr,"Shift \"%s\" specified with BYTE or HALFWORD\n",MIPS_DECODE[loop].name); | |
1125 | exit(9); | |
1126 | } | |
1127 | if ((MIPS_DECODE[loop].flags & LEFT) && (MIPS_DECODE[loop].flags & RIGHT)) { | |
1128 | fprintf(stderr,"Shift \"%s\" specified with both LEFT and RIGHT\n",MIPS_DECODE[loop].name); | |
1129 | exit(9); | |
1130 | } | |
1131 | if (!(MIPS_DECODE[loop].flags & LEFT) && !(MIPS_DECODE[loop].flags & RIGHT)) { | |
1132 | fprintf(stderr,"Shift \"%s\" specified with neither LEFT or RIGHT\n",MIPS_DECODE[loop].name); | |
1133 | exit(9); | |
1134 | } | |
1135 | if ((MIPS_DECODE[loop].flags & LOGICAL) && (MIPS_DECODE[loop].flags & ARITHMETIC)) { | |
1136 | fprintf(stderr,"Shift \"%s\" specified with both LOGICAL and ARITHMETIC\n",MIPS_DECODE[loop].name); | |
1137 | exit(9); | |
1138 | } | |
1139 | if (!(MIPS_DECODE[loop].flags & LOGICAL) && !(MIPS_DECODE[loop].flags & ARITHMETIC)) { | |
1140 | fprintf(stderr,"Shift \"%s\" specified with neither LOGICAL or ARITHMETIC\n",MIPS_DECODE[loop].name); | |
1141 | exit(9); | |
1142 | } | |
1143 | if ((MIPS_DECODE[loop].flags & LEFT) && (MIPS_DECODE[loop].flags & ARITHMETIC)) { | |
1144 | fprintf(stderr,"Arithmetic LEFT shift \"%s\" specified\n",MIPS_DECODE[loop].name); | |
1145 | exit(9); | |
1146 | } | |
1147 | ||
1148 | /* If register specified shift, then extract the relevant shift amount: */ | |
1149 | if (flags & fieldval('s')) | |
1150 | printf(" op1 &= 0x%02X;\n",(bits - 1)); | |
1151 | ||
1152 | /* If HI32 specified, then shift range is 32..63 */ | |
1153 | if (MIPS_DECODE[loop].flags & HI32) | |
1154 | printf(" op1 |= (1 << 6);\n"); | |
1155 | ||
8bae0a0c JSC |
1156 | /* We do not need to perform pre-masking with 0xFFFFFFFF when |
1157 | dealing with 32bit shift lefts, since the sign-extension | |
1158 | code will replace any remaining hi-bits: */ | |
1159 | if (MIPS_DECODE[loop].flags & LEFT) | |
e871dd18 | 1160 | printf(" GPR[destreg] = ((uword64)op2 << op1);\n"); |
8bae0a0c | 1161 | else |
e871dd18 | 1162 | printf(" GPR[destreg] = ((uword64)(op2%s) >> op1);\n",((bits == 32) ? " & 0xFFFFFFFF" : "")); |
8ad57737 JSC |
1163 | |
1164 | /* For ARITHMETIC shifts, we must duplicate the sign-bit */ | |
1165 | if (MIPS_DECODE[loop].flags & ARITHMETIC) | |
1166 | printf(" GPR[destreg] |= ((op2 & ((%s)1 << %d)) ? ((((%s)1 << (op1 + 1)) - 1) << (%d - op1)) : 0);\n",ltype,(bits - 1),ltype,(bits - 1)); | |
1167 | ||
1168 | /* Ensure WORD values are sign-extended into 64bit registers */ | |
1169 | if ((bits == 32) && (gprlen == 64)) | |
1170 | printf(" GPR[destreg] = SIGNEXTEND(GPR[destreg],%d);\n",bits); | |
1171 | } | |
1172 | break ; | |
1173 | ||
8bae0a0c | 1174 | case MOVE: |
8ad57737 JSC |
1175 | if (MIPS_DECODE[loop].flags & (HI | LO)) { |
1176 | char *regname = ((MIPS_DECODE[loop].flags & LO) ? "LO" : "HI"); | |
1177 | if (flags & fieldval('d')) | |
1178 | printf(" GPR[destreg] = %s;\n",regname); | |
1179 | else { | |
1180 | if (features & FEATURE_WARN_LOHI) { | |
1181 | printf(" if (%sACCESS != 0)\n",regname); | |
1182 | printf(" WARNING(\"MT (move-to) over-writing %s register value\");\n",regname); | |
1183 | } | |
1184 | printf(" %s = op1;\n",regname); | |
1185 | } | |
1186 | if (features & FEATURE_WARN_LOHI) | |
1187 | printf(" %sACCESS = 3; /* 3rd instruction will be safe */\n",regname); | |
1188 | } else | |
1189 | if (MIPS_DECODE[loop].flags & SHIFT16) | |
1190 | printf(" GPR[destreg] = (op2 << 16);\n"); | |
1191 | else { | |
1192 | /* perform conditional move */ | |
1193 | if (!(MIPS_DECODE[loop].flags & EQ)) { | |
1194 | fprintf(stderr,"Standard conditional %s does not have the equality flag\n",MIPS_DECODE[loop].name); | |
1195 | exit(8); | |
1196 | } | |
1197 | printf(" if (op2 %c= 0)\n",((MIPS_DECODE[loop].flags & NOT) ? '!' : '=')); | |
1198 | printf(" GPR[destreg] = op1;\n"); | |
1199 | } | |
1200 | break ; | |
1201 | ||
8bae0a0c | 1202 | case SYNC: |
8ad57737 JSC |
1203 | printf(" SyncOperation(op1);\n"); |
1204 | break ; | |
1205 | ||
8bae0a0c | 1206 | case SYSCALL: |
8ad57737 JSC |
1207 | printf(" SignalException(SystemCall);\n"); |
1208 | break ; | |
1209 | ||
8bae0a0c | 1210 | case BREAK: |
8ad57737 JSC |
1211 | printf(" SignalException(BreakPoint);\n"); |
1212 | break ; | |
1213 | ||
8bae0a0c | 1214 | case TRAP: |
8ad57737 JSC |
1215 | { |
1216 | int boolNOT = (MIPS_DECODE[loop].flags & NOT); | |
1217 | int boolEQ = (MIPS_DECODE[loop].flags & EQ); | |
1218 | int boolGT = (MIPS_DECODE[loop].flags & GT); | |
1219 | int boolLT = (MIPS_DECODE[loop].flags & LT); | |
1220 | int boolU = (MIPS_DECODE[loop].flags & UNSIGNED); | |
1221 | ||
1222 | if (boolGT && boolLT) { | |
1223 | fprintf(stderr,"GT and LT specified for \"%s\"\n",MIPS_DECODE[loop].name); | |
1224 | exit(8); | |
1225 | } | |
1226 | ||
1227 | if (boolNOT && (boolGT || boolLT)) { | |
1228 | fprintf(stderr,"NOT specified with GT or LT specified for \"%s\"\n",MIPS_DECODE[loop].name); | |
1229 | exit(8); | |
1230 | } | |
1231 | ||
e871dd18 | 1232 | printf(" if ((%sword64)op1 ",(boolU ? "u" : "")); |
8ad57737 | 1233 | printf("%c%s",(boolNOT ? '!' : (boolLT ? '<' : (boolGT ? '>' : '='))),(boolEQ ? "=" : "")); |
e871dd18 | 1234 | printf(" (%sword64)op2)\n",(boolU ? "u" : "")); |
8ad57737 JSC |
1235 | printf(" SignalException(Trap);\n"); |
1236 | } | |
1237 | break ; | |
1238 | ||
8bae0a0c | 1239 | case SET: |
8ad57737 JSC |
1240 | { |
1241 | int boolU = (MIPS_DECODE[loop].flags & UNSIGNED); | |
1242 | ||
1243 | if (!(MIPS_DECODE[loop].flags & LT)) { | |
1244 | fprintf(stderr,"Set instruction without LT specified \"%s\"\n",MIPS_DECODE[loop].name); | |
1245 | exit(8); | |
1246 | } | |
1247 | ||
e871dd18 | 1248 | printf(" if ((%sword64)op1 < (%sword64)op2)\n",(boolU ? "u" : ""),(boolU ? "u" : "")); |
8ad57737 JSC |
1249 | printf(" GPR[destreg] = 1;\n"); |
1250 | printf(" else\n"); | |
1251 | printf(" GPR[destreg] = 0;\n"); | |
1252 | } | |
1253 | break ; | |
1254 | ||
8bae0a0c | 1255 | case AND: |
8ad57737 JSC |
1256 | printf(" GPR[destreg] = (op1 & op2);\n"); |
1257 | break ; | |
1258 | ||
8bae0a0c | 1259 | case OR: |
8ad57737 JSC |
1260 | printf(" GPR[destreg] = (%sop1 | op2);\n",((MIPS_DECODE[loop].flags & NOT) ? "~" : "")); |
1261 | break ; | |
1262 | ||
8bae0a0c | 1263 | case XOR: |
8ad57737 JSC |
1264 | printf(" GPR[destreg] = (op1 ^ op2);\n"); |
1265 | break ; | |
1266 | ||
8bae0a0c | 1267 | case DECODE: |
8ad57737 JSC |
1268 | printf(" decode_coproc(instruction);\n"); |
1269 | break ; | |
1270 | ||
8bae0a0c | 1271 | case CACHE: |
8ad57737 JSC |
1272 | /* 16-bit offset is sign-extended and added to the base register to make a virtual address */ |
1273 | /* The virtual address is translated to a physical address using the TLB */ | |
1274 | /* The hint specifies a cache operation for that address */ | |
1275 | printf(" uword64 vaddr = (op1 + offset);\n"); | |
1276 | printf(" uword64 paddr;\n"); | |
1277 | printf(" int uncached;\n"); | |
1278 | /* NOTE: We are assuming that the AddressTranslation is a load: */ | |
1279 | printf(" if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))\n"); | |
1280 | printf(" CacheOp(hint,vaddr,paddr,instruction);\n"); | |
1281 | break; | |
1282 | ||
8bae0a0c | 1283 | case MADD16: /* VR4100 specific multiply-add instructions */ |
8ad57737 JSC |
1284 | /* Some of this code is shared with the standard multiply |
1285 | routines, so an effort should be made to merge where | |
1286 | possible. */ | |
1287 | if (features & FEATURE_WARN_LOHI) { | |
1288 | printf(" CHECKHILO(\"Multiply-Add\");\n"); | |
1289 | } | |
1290 | if (features & FEATURE_WARN_RESULT) { | |
1291 | /* Give user a warning if either op1 or op2 are not 16bit signed integers */ | |
1292 | printf(" if (NOTHALFWORDVALUE(op1) || NOTHALFWORDVALUE(op2))\n"); | |
1293 | printf(" WARNING(\"MADD16 operation with non-16bit operands\");\n"); | |
1294 | } | |
1295 | printf(" {\n"); | |
1296 | printf(" uword64 temp = (op1 * op2);\n"); /* 16x16 multiply */ | |
1297 | if (GETDATASIZE() == DOUBLEWORD) { | |
1298 | printf(" LO = LO + temp;\n"); | |
1299 | } else { /* WORD */ | |
a647a859 JSC |
1300 | printf(" temp += (SET64HI(WORD64LO(HI)) | WORD64LO(LO));\n"); |
1301 | printf(" LO = SIGNEXTEND((%s)WORD64LO(temp),32);\n",regtype); | |
1302 | printf(" HI = SIGNEXTEND((%s)WORD64HI(temp),32);\n",regtype); | |
8ad57737 JSC |
1303 | } |
1304 | printf(" }\n"); | |
1305 | break; | |
1306 | ||
8bae0a0c JSC |
1307 | case RSVD: /* "Reserved Instruction" on MIPS IV, or if co-proc 3 absent. Otherwise "CoProcessorUnusable" */ |
1308 | if (doisa < 4) { | |
8ad57737 JSC |
1309 | printf(" if (CoProcPresent(3))\n"); |
1310 | printf(" SignalException(CoProcessorUnusable);\n"); | |
1311 | printf(" else\n"); | |
1312 | } | |
1313 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1314 | break ; | |
1315 | ||
8bae0a0c | 1316 | case JUMP: |
8ad57737 JSC |
1317 | if (MIPS_DECODE[loop].flags & LINK) { |
1318 | if (!(MIPS_DECODE[loop].flags & REG)) | |
1319 | printf(" int destreg = 31;\n"); | |
1320 | printf(" GPR[destreg] = (PC + 4); /* NOTE: The PC is already 4 ahead within the simulator */\n"); | |
1321 | } | |
1322 | ||
1323 | printf(" /* NOTE: The jump occurs AFTER the next instruction has been executed */\n"); | |
1324 | printf(" DSPC = op1;\n"); | |
1325 | printf(" DELAYSLOT();\n"); | |
1326 | break ; | |
1327 | ||
8bae0a0c JSC |
1328 | case BRANCH: /* execute delay slot instruction before branch unless (LIKELY && branch_not_taken) */ |
1329 | if (MIPS_DECODE[loop].flags & FP) { | |
1330 | if (doisa < 4) { | |
1331 | printf(" if (condition_code != 0)\n"); | |
1332 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1333 | printf(" else {\n"); | |
1334 | } | |
1335 | /* "PREVCOC1()" should be the COC1 value at the start of the preceding instruction */ | |
1336 | printf(" int condition = (%s == boolean);\n",((doisa < 4) ? "PREVCOC1()" : "GETFCC(condition_code)")); | |
1337 | } else { | |
1338 | if ((MIPS_DECODE[loop].flags & NOT) && !(MIPS_DECODE[loop].flags & EQ)) { | |
1339 | fprintf(stderr,"NOT specified when not EQ in \"%s\"\n",MIPS_DECODE[loop].name); | |
1340 | exit(7); | |
1341 | } | |
1342 | if ((MIPS_DECODE[loop].flags & NOT) && (MIPS_DECODE[loop].flags & (GT | LT))) { | |
1343 | fprintf(stderr,"NOT specified with GT or LT in \"%s\"\n",MIPS_DECODE[loop].name); | |
1344 | exit(7); | |
1345 | } | |
1346 | /* GT LT */ | |
1347 | if (MIPS_DECODE[loop].flags & GT) | |
1348 | printf(" int condition = (op1 >%s 0);\n",((MIPS_DECODE[loop].flags & EQ) ? "=" : "")); | |
1349 | else | |
1350 | if (MIPS_DECODE[loop].flags & LT) | |
1351 | printf(" int condition = (op1 <%s 0);\n",((MIPS_DECODE[loop].flags & EQ) ? "=" : "")); | |
1352 | else | |
1353 | if (MIPS_DECODE[loop].flags & EQ) | |
1354 | printf(" int condition = (op1 %c= op2);\n",((MIPS_DECODE[loop].flags & NOT) ? '!' : '=')); | |
8ad57737 | 1355 | } |
8ad57737 JSC |
1356 | |
1357 | if (MIPS_DECODE[loop].flags & LINK) { | |
1358 | if (features & FEATURE_WARN_R31) { | |
1359 | printf(" if (((instruction >> %d) & 0x%08X) == 31)\n",OP_SH_RS,OP_MASK_RS); | |
1360 | printf(" WARNING(\"Branch with link using r31 as source operand\");\n"); | |
1361 | } | |
1362 | printf(" GPR[31] = (PC + 4); /* NOTE: PC is already 8 ahead */\n"); | |
1363 | } | |
1364 | ||
1365 | printf(" /* NOTE: The branch occurs AFTER the next instruction has been executed */\n"); | |
1366 | printf(" if (condition) {\n"); | |
1367 | printf(" DSPC = (PC + offset);\n"); | |
1368 | printf(" DELAYSLOT();\n"); | |
1369 | printf(" }\n"); | |
8bae0a0c JSC |
1370 | if ((MIPS_DECODE[loop].flags & FP) && (doisa != 1)) { |
1371 | printf(" else if (likely) {\n"); | |
1372 | printf(" NULLIFY();\n"); | |
1373 | printf(" }\n"); | |
1374 | } else if (MIPS_DECODE[loop].flags & LIKELY) { | |
8ad57737 JSC |
1375 | printf(" else\n"); |
1376 | printf(" NULLIFY();\n"); | |
1377 | } | |
8bae0a0c JSC |
1378 | if ((MIPS_DECODE[loop].flags & FP) && (doisa < 4)) |
1379 | printf(" }\n"); | |
8ad57737 JSC |
1380 | break ; |
1381 | ||
8bae0a0c JSC |
1382 | case PREFETCH: /* The beginning is shared with normal load operations */ |
1383 | case LOAD: | |
1384 | case STORE: | |
8ad57737 JSC |
1385 | { |
1386 | int isload = ((MIPS_DECODE[loop].type == LOAD) || (MIPS_DECODE[loop].type == PREFETCH)); | |
1387 | int datalen; | |
1388 | char *accesslength = "<UNKNOWN>"; | |
1389 | ||
1390 | switch (GETDATASIZE()) { | |
1391 | case BYTE : | |
1392 | datalen = 1; | |
1393 | accesslength = "AccessLength_BYTE"; | |
1394 | break ; | |
1395 | ||
1396 | case HALFWORD : | |
1397 | datalen = 2; | |
1398 | accesslength = "AccessLength_HALFWORD"; | |
1399 | break ; | |
1400 | ||
1401 | case WORD : | |
1402 | datalen = 4; | |
1403 | accesslength = "AccessLength_WORD"; | |
1404 | break ; | |
1405 | ||
1406 | case DOUBLEWORD : | |
1407 | datalen = 8; | |
1408 | accesslength = "AccessLength_DOUBLEWORD"; | |
1409 | break ; | |
1410 | } | |
1411 | ||
8bae0a0c | 1412 | if (MIPS_DECODE[loop].flags & REG) |
e871dd18 | 1413 | printf(" uword64 vaddr = ((uword64)op1 + op2);\n"); |
8bae0a0c | 1414 | else |
e871dd18 | 1415 | printf(" uword64 vaddr = ((uword64)op1 + offset);\n"); |
8ad57737 JSC |
1416 | printf(" uword64 paddr;\n"); |
1417 | printf(" int uncached;\n"); | |
1418 | ||
1419 | /* The following check should only occur on normal (non-shifted) memory loads */ | |
1420 | if ((datalen != 1) && !(MIPS_DECODE[loop].flags & (LEFT | RIGHT))) { | |
1421 | printf(" if ((vaddr & %d) != 0)\n",(datalen - 1)); | |
1422 | printf(" SignalException(%s);\n",(isload ? "AddressLoad" : "AddressStore")); | |
1423 | printf(" else\n") ; | |
1424 | } | |
1425 | ||
1426 | printf(" {\n"); | |
1427 | printf(" if (AddressTranslation(vaddr,isDATA,%s,&paddr,&uncached,isTARGET,isREAL))\n",(isload ? "isLOAD" : "isSTORE")); | |
1428 | ||
1429 | if (MIPS_DECODE[loop].type == PREFETCH) | |
1430 | printf(" Prefetch(uncached,paddr,vaddr,isDATA,hint);\n"); | |
1431 | else { | |
1432 | printf(" {\n"); | |
1433 | printf(" %s memval;\n",(proc64 ? "uword64" : "unsigned int")); | |
1434 | ||
8bae0a0c JSC |
1435 | if ((MIPS_DECODE[loop].flags & COPROC) && ((datalen != 4) && (datalen != 8))) { |
1436 | fprintf(stderr,"Co-processor transfer operation not WORD or DOUBLEWORD in length \"%s\"\n",MIPS_DECODE[loop].name); | |
1437 | exit(6); | |
1438 | } | |
8ad57737 | 1439 | |
8bae0a0c JSC |
1440 | if (MIPS_DECODE[loop].flags & (LEFT | RIGHT)) { |
1441 | if ((MIPS_DECODE[loop].flags & LEFT) && (MIPS_DECODE[loop].flags & RIGHT)) { | |
1442 | fprintf(stderr,"Memory transfer with both LEFT and RIGHT specified \"%s\"\n",MIPS_DECODE[loop].name); | |
1443 | exit(4); | |
8ad57737 | 1444 | } |
8ad57737 | 1445 | |
8bae0a0c JSC |
1446 | switch (datalen) { |
1447 | case 8: | |
1448 | if (!proc64) { | |
1449 | fprintf(stderr,"DOUBLEWORD shifted memory transfers only valid for 64-bit processors \"%s\"\n",MIPS_DECODE[loop].name); | |
1450 | exit(4); | |
1451 | } | |
1452 | /* fall through to... */ | |
1453 | case 4: | |
1454 | { | |
1455 | char *maskstr = ((datalen == 8) ? "((uword64)-1)" : "0xFFFFFFFF"); | |
1456 | ||
1457 | printf(" uword64 mask = %d;\n",((datalen == 8) ? 0x7 : 0x3)); | |
1458 | printf(" unsigned int reverse = (ReverseEndian ? mask : 0);\n"); | |
1459 | printf(" unsigned int bigend = (BigEndianCPU ? mask : 0);\n"); | |
1460 | printf(" int byte;\n"); | |
1461 | printf(" paddr = ((paddr & ~mask) | ((paddr & mask) ^ reverse));\n"); | |
1462 | printf(" byte = ((vaddr & mask) ^ bigend);\n"); | |
1463 | printf(" if (%sBigEndianMem)\n",((MIPS_DECODE[loop].flags & LEFT) ? "!" : "")); | |
1464 | printf(" paddr &= ~mask;\n"); | |
1465 | ||
1466 | if (isload) { | |
1467 | if (MIPS_DECODE[loop].flags & LEFT) | |
1468 | printf(" memval = LoadMemory(uncached,byte,paddr,vaddr,isDATA,isREAL);\n"); | |
1469 | else | |
1470 | printf(" memval = LoadMemory(uncached,(%d - byte),paddr,vaddr,isDATA,isREAL);\n",(datalen - 1)); | |
8ad57737 | 1471 | } |
8ad57737 | 1472 | |
8bae0a0c | 1473 | if (MIPS_DECODE[loop].flags & LEFT) { |
8ad57737 | 1474 | if (isload) { |
8bae0a0c JSC |
1475 | /* For WORD transfers work out if the value will |
1476 | be in the top or bottom of the DOUBLEWORD | |
1477 | returned: */ | |
e871dd18 JSC |
1478 | #if 1 |
1479 | build_endian_shift(proc64,datalen,2,s_right,32); | |
1480 | #else | |
8bae0a0c JSC |
1481 | if (proc64 && (datalen == 4)) { |
1482 | printf(" if ((vaddr & (1 << 2)) ^ (BigEndianCPU << 2)) {\n"); | |
1483 | printf(" memval >>= 32;\n"); | |
1484 | printf(" }\n"); | |
8ad57737 | 1485 | } |
e871dd18 | 1486 | #endif |
8bae0a0c JSC |
1487 | printf(" GPR[destreg] = ((memval << ((%d - byte) * 8)) | (GPR[destreg] & (((uword64)1 << ((%d - byte) * 8)) - 1)));\n",(datalen - 1),(datalen - 1)); |
1488 | if (proc64 && (datalen == 4)) | |
1489 | printf(" GPR[destreg] = SIGNEXTEND(GPR[destreg],32);\n"); | |
1490 | } else { /* store */ | |
1491 | printf(" memval = (op2 >> (8 * (%d - byte)));\n",(datalen - 1)); | |
e871dd18 JSC |
1492 | #if 1 |
1493 | build_endian_shift(proc64,datalen,2,s_left,32); | |
1494 | #else | |
8bae0a0c JSC |
1495 | /* TODO: This is duplicated in the LOAD code |
1496 | above - and the RIGHT LOAD and STORE code | |
1497 | below. It should be merged if possible. */ | |
1498 | if (proc64 && (datalen == 4)) { | |
1499 | printf(" if ((vaddr & (1 << 2)) ^ (BigEndianCPU << 2)) {\n"); | |
1500 | printf(" memval <<= 32;\n"); | |
1501 | printf(" }\n"); | |
8ad57737 | 1502 | } |
e871dd18 | 1503 | #endif |
8bae0a0c JSC |
1504 | printf(" StoreMemory(uncached,byte,memval,paddr,vaddr,isREAL);\n"); |
1505 | } | |
1506 | } else { /* RIGHT */ | |
1507 | if (isload) { | |
e871dd18 JSC |
1508 | #if 1 |
1509 | build_endian_shift(proc64,datalen,2,s_right,32); | |
1510 | #else | |
8bae0a0c JSC |
1511 | if (proc64 && (datalen == 4)) { |
1512 | printf(" if ((vaddr & (1 << 2)) ^ (BigEndianCPU << 2)) {\n"); | |
1513 | printf(" memval >>= 32;\n"); | |
1514 | printf(" }\n"); | |
1515 | } | |
e871dd18 | 1516 | #endif |
8bae0a0c JSC |
1517 | printf(" {\n"); |
1518 | printf(" uword64 srcmask;\n"); | |
1519 | /* All of this extra code is just a bodge | |
1520 | required because some hosts don't allow | |
1521 | ((v) << 64). The SPARC just leaves the (v) | |
1522 | value un-touched. */ | |
1523 | printf(" if (byte == 0)\n"); | |
1524 | printf(" srcmask = 0;\n"); | |
1525 | printf(" else\n"); | |
1526 | printf(" srcmask = ((uword64)-1 << (8 * (%d - byte)));\n",datalen); | |
1527 | printf(" GPR[destreg] = ((GPR[destreg] & srcmask) | (memval >> (8 * byte)));\n",datalen); | |
1528 | printf(" }\n"); | |
1529 | if (proc64 && (datalen == 4)) | |
1530 | printf(" GPR[destreg] = SIGNEXTEND(GPR[destreg],32);\n"); | |
1531 | } else { /* store */ | |
1532 | printf(" memval = (op2 << (byte * 8));\n"); | |
1533 | printf(" StoreMemory(uncached,(%s - byte),memval,paddr,vaddr,isREAL);\n",accesslength); | |
8ad57737 JSC |
1534 | } |
1535 | } | |
8ad57737 | 1536 | } |
8bae0a0c | 1537 | break; |
8ad57737 | 1538 | |
8bae0a0c JSC |
1539 | default: |
1540 | fprintf(stderr,"Shifted memory transfer not WORD or DOUBLEWORD in length \"%s\"\n",MIPS_DECODE[loop].name); | |
1541 | exit(6); | |
1542 | } | |
1543 | } else { /* normal memory transfer */ | |
c98ec95d | 1544 | if (!(MIPS_DECODE[loop].flags & COPROC) && ((datalen == 8) || ((datalen == 4) & (MIPS_DECODE[loop].flags & UNSIGNED))) && !proc64) { |
8bae0a0c JSC |
1545 | fprintf(stderr,"Operation not available with 32bit wide memory access \"%s\"\n",MIPS_DECODE[loop].name); |
1546 | exit(4); | |
1547 | /* TODO: The R4000 documentation states that a LWU | |
1548 | instruction executed when in a 32bit processor mode | |
1549 | should cause a ReservedInstruction exception. This | |
1550 | will mean adding a run-time check into the code | |
1551 | sequence. */ | |
1552 | } | |
8ad57737 | 1553 | |
8bae0a0c | 1554 | if (isload) { |
c98ec95d JSC |
1555 | #if 1 /* see the comments attached to LOADDRMASK above */ |
1556 | printf(" uword64 mask = 0x7;\n"); | |
1557 | #else | |
8bae0a0c | 1558 | printf(" uword64 mask = %d;\n",(proc64 ? 0x7 : 0x3)); |
c98ec95d | 1559 | #endif |
8bae0a0c JSC |
1560 | printf(" unsigned int shift = %d;\n",(datalen >> 1)); |
1561 | printf(" unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);\n"); | |
1562 | printf(" unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);\n"); | |
1563 | printf(" unsigned int byte;\n"); | |
8ad57737 | 1564 | |
c98ec95d | 1565 | /* TODO: This should really also check for 32bit world performing 32bit access */ |
8bae0a0c JSC |
1566 | if (datalen != 8) /* not for DOUBLEWORD */ |
1567 | printf(" paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));\n"); | |
8ad57737 | 1568 | |
8bae0a0c | 1569 | printf(" memval = LoadMemory(uncached,%s,paddr,vaddr,isDATA,isREAL);\n",accesslength); |
8ad57737 | 1570 | |
8bae0a0c JSC |
1571 | /* The following will only make sense if the |
1572 | "LoadMemory" above returns a DOUBLEWORD entity */ | |
1573 | if (datalen != 8) { /* not for DOUBLEWORD */ | |
1574 | int valmask; | |
1575 | switch (datalen) { | |
1576 | case 1: | |
1577 | valmask = 0xFF; | |
1578 | break; | |
1579 | ||
1580 | case 2: | |
1581 | valmask = 0xFFFF; | |
1582 | break; | |
1583 | ||
1584 | case 4: | |
1585 | valmask = 0xFFFFFFFF; | |
1586 | break; | |
1587 | ||
1588 | default: | |
1589 | fprintf(stderr,"Unrecognised datalen (%d) when processing \"%s\"\n",datalen,MIPS_DECODE[loop].name); | |
1590 | exit(4); | |
1591 | } | |
1592 | printf(" byte = ((vaddr & mask) ^ (bigend << shift));\n"); | |
1593 | /* NOTE: The R4000 user manual has the COP_LW | |
1594 | occuring in the same cycle as the rest of the | |
1595 | instruction, yet the MIPS IV shows the operation | |
1596 | happening on the next cycle. To keep the simulator | |
1597 | simple, this code follows the R4000 | |
1598 | manual. Experimentation with a silicon | |
1599 | implementation will be needed to ascertain the | |
1600 | correct operation. */ | |
1601 | if (MIPS_DECODE[loop].flags & COPROC) | |
1602 | printf(" COP_LW(((instruction >> 26) & 0x3),destreg,(unsigned int)"); | |
1603 | else | |
1604 | printf(" GPR[destreg] = ("); | |
1605 | ||
1606 | if (MIPS_DECODE[loop].flags & SIGNEXTEND) | |
1607 | printf("SIGNEXTEND("); | |
1608 | printf("((memval >> (8 * byte)) & 0x%08X)",valmask); | |
1609 | if (MIPS_DECODE[loop].flags & SIGNEXTEND) | |
1610 | printf(",%d)",(datalen * 8)); | |
1611 | printf(");\n"); | |
1612 | } else { | |
1613 | if (MIPS_DECODE[loop].flags & COPROC) | |
1614 | printf(" COP_LD(((instruction >> 26) & 0x3),destreg,memval);;\n"); | |
1615 | else | |
1616 | printf(" GPR[destreg] = memval;\n"); | |
1617 | } | |
1618 | } else { /* store operation */ | |
1619 | if ((datalen == 1) || (datalen == 2)) { | |
1620 | /* SH and SB */ | |
c98ec95d JSC |
1621 | #if 1 /* see the comments attached to LOADDRMASK above */ |
1622 | printf(" uword64 mask = 0x7;\n"); | |
1623 | #else | |
8bae0a0c | 1624 | printf(" uword64 mask = %d;\n",(proc64 ? 0x7 : 0x3)); |
c98ec95d | 1625 | #endif |
8bae0a0c JSC |
1626 | printf(" unsigned int shift = %d;\n",(datalen >> 1)); |
1627 | printf(" unsigned int reverse = (ReverseEndian ? (mask >> shift) : 0);\n"); | |
1628 | printf(" unsigned int bigend = (BigEndianCPU ? (mask >> shift) : 0);\n"); | |
1629 | printf(" unsigned int byte;\n"); | |
8ad57737 | 1630 | |
8bae0a0c JSC |
1631 | printf(" paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));\n"); |
1632 | printf(" byte = ((vaddr & mask) ^ (bigend << shift));\n"); | |
1633 | printf(" memval = (op2 << (8 * byte));\n"); | |
1634 | } else | |
1635 | if (proc64 && (datalen == 4)) { /* proc64 SC and SW */ | |
c98ec95d JSC |
1636 | #if 1 /* see the comments attached to LOADDRMASK above */ |
1637 | printf(" uword64 mask = 0x7;\n"); | |
1638 | #else | |
1639 | printf(" uword64 mask = %d;\n",(proc64 ? 0x7 : 0x3)); | |
1640 | #endif | |
8bae0a0c | 1641 | printf(" unsigned int byte;\n"); |
c98ec95d JSC |
1642 | printf(" paddr = ((paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)));\n"); |
1643 | printf(" byte = ((vaddr & mask) ^ (BigEndianCPU << 2));\n"); | |
8bae0a0c | 1644 | if (MIPS_DECODE[loop].flags & COPROC) |
e871dd18 | 1645 | printf(" memval = (((uword64)COP_SW(((instruction >> 26) & 0x3),%s)) << (8 * byte));\n",((MIPS_DECODE[loop].flags & FP) ? "fs" : "destreg")); |
8bae0a0c JSC |
1646 | else |
1647 | printf(" memval = (op2 << (8 * byte));\n"); | |
1648 | } else { /* !proc64 SC and SW, plus proc64 SD and SCD */ | |
1649 | if (MIPS_DECODE[loop].flags & COPROC) | |
e871dd18 | 1650 | printf(" memval = (uword64)COP_S%c(((instruction >> 26) & 0x3),%s);\n",((datalen == 8) ? 'D' : 'W'),((MIPS_DECODE[loop].flags & FP) ? "fs" : "destreg")); |
8bae0a0c JSC |
1651 | else |
1652 | printf(" memval = op2;\n"); | |
1653 | } | |
1654 | ||
1655 | if (MIPS_DECODE[loop].flags & ATOMIC) | |
1656 | printf(" if (LLBIT)\n"); | |
1657 | ||
1658 | printf(" {\n"); | |
1659 | printf(" StoreMemory(uncached,%s,memval,paddr,vaddr,isREAL);\n",accesslength); | |
1660 | printf(" }\n"); | |
1661 | } | |
8ad57737 | 1662 | |
8bae0a0c JSC |
1663 | if (MIPS_DECODE[loop].flags & ATOMIC) { |
1664 | if ((datalen != 4) && (datalen != 8)) { | |
1665 | fprintf(stderr,"ATOMIC can only be applied to WORD and DOUBLEWORD instructions \"%s\"\n",MIPS_DECODE[loop].name); | |
1666 | exit(4); | |
1667 | } else | |
1668 | if (isload) | |
1669 | printf(" LLBIT = 1;\n"); | |
1670 | else { | |
1671 | /* The documentation states that: | |
1672 | ||
1673 | SC *WILL* fail if coherent store into the same | |
1674 | block occurs, or if an exception occurs between | |
1675 | the LL and SC instructions. | |
1676 | ||
1677 | SC *MAY* fail if a load, store or prefetch is | |
1678 | executed on the processor (VR4300 doesn't seem | |
1679 | to), or if the instructions between the LL and | |
1680 | SC are not in a 2048byte contiguous VM range. | |
1681 | ||
1682 | SC *MUST* have been preceded by an LL | |
1683 | (i.e. LLBIT will be set), and it must use the | |
1684 | same Vaddr, Paddr and cache-coherence algorithm | |
1685 | as the LL (which means we should store this | |
1686 | information from the load-conditional). | |
1687 | */ | |
1688 | printf(" GPR[(instruction >> %d) & 0x%08X] = LLBIT;\n",OP_SH_RT,OP_MASK_RT); | |
1689 | } | |
1690 | } | |
1691 | } | |
8ad57737 JSC |
1692 | printf(" }\n"); |
1693 | } | |
1694 | printf(" }\n"); | |
1695 | } | |
1696 | break ; | |
1697 | ||
8bae0a0c JSC |
1698 | case FPPREFX: |
1699 | /* This code could be merged with the PREFIX generation above: */ | |
e871dd18 | 1700 | printf(" uword64 vaddr = ((uword64)op1 + (uword64)op2);\n"); |
8bae0a0c JSC |
1701 | printf(" uword64 paddr;\n"); |
1702 | printf(" int uncached;\n"); | |
1703 | printf(" if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))\n"); | |
1704 | printf(" Prefetch(uncached,paddr,vaddr,isDATA,fs);\n"); | |
8ad57737 JSC |
1705 | break ; |
1706 | ||
8bae0a0c JSC |
1707 | case FPMOVEC: |
1708 | if (MIPS_DECODE[loop].flags & CONTROL) { | |
1709 | /* The following "magic" of interpreting the FP | |
1710 | control-register number would not be needed if we were not | |
1711 | trying to match our internal register numbers with those | |
1712 | used by GDB. */ | |
1713 | printf(" if (to) {\n"); | |
1714 | if (doisa < 4) { | |
1715 | printf(" if (fs == 0) {\n"); | |
a647a859 | 1716 | printf(" PENDING_FILL((fs + FCR0IDX),WORD64LO(GPR[ft]));\n"); |
8bae0a0c | 1717 | printf(" } else if (fs == 31) {\n"); |
a647a859 | 1718 | printf(" PENDING_FILL((fs + FCR31IDX),WORD64LO(GPR[ft]));\n"); |
8bae0a0c JSC |
1719 | printf(" } /* else NOP */\n"); |
1720 | printf(" PENDING_FILL(COCIDX,0); /* special case */\n"); | |
1721 | } else { | |
1722 | printf(" if (fs == 0) {\n"); | |
a647a859 | 1723 | printf(" FCR0 = WORD64LO(GPR[ft]);\n"); |
8bae0a0c | 1724 | printf(" } else if (fs == 31) {\n"); |
a647a859 | 1725 | printf(" FCR31 = WORD64LO(GPR[ft]);\n"); |
8bae0a0c JSC |
1726 | printf(" } /* else NOP */\n"); |
1727 | printf(" SETFCC(0,((FCR31 & (1 << 23)) ? 1 : 0)); /* COC[1] */\n"); | |
1728 | } | |
1729 | printf(" } else { /* control from */\n"); | |
1730 | if (doisa < 4) { | |
1731 | printf(" if (fs == 0) {\n"); | |
1732 | printf(" PENDING_FILL(ft,SIGNEXTEND(FCR0,32));\n"); | |
1733 | printf(" } else if (fs == 31) {\n"); | |
1734 | printf(" PENDING_FILL(ft,SIGNEXTEND(FCR31,32));\n"); | |
1735 | printf(" } /* else NOP */\n"); | |
1736 | } else { | |
1737 | printf(" if (fs == 0) {\n"); | |
1738 | printf(" GPR[ft] = SIGNEXTEND(FCR0,32);\n"); | |
1739 | printf(" } else if (fs == 31) {\n"); | |
1740 | printf(" GPR[ft] = SIGNEXTEND(FCR31,32);\n"); | |
1741 | printf(" } /* else NOP */\n"); | |
1742 | } | |
1743 | printf(" }\n"); | |
1744 | } else { | |
1745 | printf(" if (to) {\n"); | |
1746 | if (GETDATASIZE() == WORD) { | |
1747 | if (doisa < 4) { | |
1748 | printf(" if (SizeFGR() == 64) {\n"); | |
a647a859 | 1749 | printf(" PENDING_FILL((fs + FGRIDX),(SET64HI(0xDEADC0DE) | WORD64LO(GPR[ft])));\n"); |
8bae0a0c | 1750 | printf(" } else { \n"); |
a647a859 | 1751 | printf(" PENDING_FILL((fs + FGRIDX),WORD64LO(GPR[ft]));\n"); |
8bae0a0c JSC |
1752 | printf(" }\n"); |
1753 | } else { | |
1754 | printf(" if (SizeFGR() == 64)\n"); | |
a647a859 | 1755 | printf(" FGR[fs] = (SET64HI(0xDEADC0DE) | WORD64LO(GPR[ft]));\n"); |
8bae0a0c | 1756 | printf(" else\n"); |
a647a859 | 1757 | printf(" FGR[fs] = WORD64LO(GPR[ft]);\n"); |
8bae0a0c JSC |
1758 | printf(" fpr_state[fs] = fmt_uninterpreted;\n"); |
1759 | } | |
1760 | } else if (GETDATASIZE() == DOUBLEWORD) { | |
1761 | if (doisa < 4) { | |
1762 | printf(" if (SizeFGR() == 64) {\n"); | |
1763 | printf(" PENDING_FILL((fs + FGRIDX),GPR[ft]);\n"); | |
1764 | printf(" } else\n"); | |
1765 | printf(" if ((fs & 0x1) == 0)\n"); | |
1766 | printf(" {\n"); | |
a647a859 JSC |
1767 | printf(" PENDING_FILL(((fs + 1) + FGRIDX),WORD64HI(GPR[ft]));\n"); |
1768 | printf(" PENDING_FILL((fs + FGRIDX),WORD64LO(GPR[ft]));\n"); | |
8bae0a0c JSC |
1769 | printf(" }\n"); |
1770 | if (features & FEATURE_WARN_RESULT) { | |
1771 | printf(" else\n"); | |
1772 | printf(" UndefinedResult();\n"); | |
1773 | } | |
1774 | } else { | |
1775 | printf(" if (SizeFGR() == 64) {\n"); | |
1776 | printf(" FGR[fs] = GPR[ft];\n"); | |
1777 | printf(" fpr_state[fs] = fmt_uninterpreted;\n"); | |
1778 | printf(" } else\n"); | |
1779 | printf(" if ((fs & 0x1) == 0)\n"); | |
1780 | printf(" {\n"); | |
a647a859 JSC |
1781 | printf(" FGR[fs + 1] = WORD64HI(GPR[ft]);\n"); |
1782 | printf(" FGR[fs] = WORD64LO(GPR[ft]);\n"); | |
8bae0a0c JSC |
1783 | printf(" fpr_state[fs + 1] = fmt_uninterpreted;\n"); |
1784 | printf(" fpr_state[fs] = fmt_uninterpreted;\n"); | |
1785 | printf(" }\n"); | |
1786 | if (features & FEATURE_WARN_RESULT) { | |
1787 | printf(" else\n"); | |
1788 | printf(" UndefinedResult();\n"); | |
1789 | } | |
1790 | } | |
1791 | } else { | |
1792 | fprintf(stderr,"Invalid data width specified in FPU Move operation\n"); | |
1793 | exit(1); | |
1794 | } | |
1795 | printf(" } else {\n"); | |
1796 | if (GETDATASIZE() == WORD) { | |
1797 | if (doisa < 4) /* write-back occurs in next cycle */ | |
1798 | printf(" PENDING_FILL(ft,SIGNEXTEND(FGR[fs],32));\n"); | |
1799 | else /* in this cycle */ | |
1800 | printf(" GPR[ft] = SIGNEXTEND(FGR[fs],32);\n"); | |
1801 | } else if (GETDATASIZE() == DOUBLEWORD) { | |
1802 | if (doisa < 4) { | |
1803 | printf(" if (SizeFGR() == 64) {\n"); | |
1804 | printf(" PENDING_FILL(ft,FGR[fs]);\n"); | |
1805 | printf(" } else\n"); | |
1806 | printf(" if ((fs & 0x1) == 0) {\n"); | |
a647a859 | 1807 | printf(" PENDING_FILL(ft,(SET64HI(FGR[fs+1]) | FGR[fs]));\n"); |
8bae0a0c | 1808 | printf(" } else {\n"); |
a647a859 | 1809 | printf(" PENDING_FILL(ft,SET64HI(0xDEADC0DE) | 0xBAD0BAD0);\n"); |
8bae0a0c JSC |
1810 | if (features & FEATURE_WARN_RESULT) |
1811 | printf(" UndefinedResult();\n"); | |
1812 | printf(" }\n"); | |
1813 | } else { | |
1814 | printf(" if (SizeFGR() == 64)\n"); | |
1815 | printf(" GPR[ft] = FGR[fs];\n"); | |
1816 | printf(" else\n"); | |
1817 | printf(" if ((fs & 0x1) == 0)\n"); | |
a647a859 | 1818 | printf(" GPR[ft] = (SET64HI(FGR[fs + 1]) | FGR[fs]);\n"); |
8bae0a0c | 1819 | printf(" else {\n"); |
a647a859 | 1820 | printf(" GPR[ft] = (SET64HI(0xDEADC0DE) | 0xBAD0BAD0);\n"); |
8bae0a0c JSC |
1821 | if (features & FEATURE_WARN_RESULT) |
1822 | printf(" UndefinedResult();\n"); | |
1823 | printf(" }\n"); | |
1824 | } | |
1825 | } else { | |
1826 | fprintf(stderr,"Invalid data width specified in FPU Move operation\n"); | |
1827 | exit(1); | |
1828 | } | |
1829 | printf(" }\n"); | |
1830 | } | |
8ad57737 JSC |
1831 | break ; |
1832 | ||
8bae0a0c JSC |
1833 | case FPMOVE: |
1834 | if (MIPS_DECODE[loop].flags & CONDITIONAL) { | |
1835 | if (MIPS_DECODE[loop].flags & INTEGER) { /* moving GPR - testing FGR */ | |
1836 | printf(" if (GETFCC(condition_code) == boolean)\n"); | |
1837 | printf(" GPR[destreg] = op1;\n"); | |
1838 | } else { | |
1839 | if (MIPS_DECODE[loop].flags & EQ) /* moving FGR - testing GPR */ | |
1840 | printf(" if (op2 %c= 0)\n",((MIPS_DECODE[loop].flags & NOT) ? '!' : '=')); | |
1841 | else | |
1842 | printf(" if (GETFCC(condition_code) == boolean)\n"); | |
1843 | printf(" StoreFPR(destreg,format,ValueFPR(fs,format));\n"); | |
1844 | printf(" else\n"); | |
1845 | printf(" StoreFPR(destreg,format,ValueFPR(destreg,format));\n"); | |
1846 | } | |
1847 | } else { /* simple MOVE */ | |
1848 | printf(" StoreFPR(destreg,format,ValueFPR(fs,format));\n"); | |
1849 | } | |
8ad57737 JSC |
1850 | break ; |
1851 | ||
8bae0a0c JSC |
1852 | case FPNEG: |
1853 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1854 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1855 | printf(" else\n"); | |
1856 | printf(" StoreFPR(destreg,format,Negate(ValueFPR(fs,format),format));\n"); | |
8ad57737 JSC |
1857 | break ; |
1858 | ||
8bae0a0c JSC |
1859 | case FPABS: |
1860 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1861 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1862 | printf(" else\n"); | |
1863 | printf(" StoreFPR(destreg,format,AbsoluteValue(ValueFPR(fs,format),format));\n"); | |
8ad57737 JSC |
1864 | break ; |
1865 | ||
8bae0a0c JSC |
1866 | case FPDIV: |
1867 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1868 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1869 | printf(" else\n"); | |
1870 | printf(" StoreFPR(destreg,format,Divide(ValueFPR(fs,format),ValueFPR(ft,format),format));\n"); | |
8ad57737 JSC |
1871 | break ; |
1872 | ||
8bae0a0c JSC |
1873 | case FPMUL: |
1874 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1875 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1876 | printf(" else\n"); | |
1877 | printf(" StoreFPR(destreg,format,Multiply(ValueFPR(fs,format),ValueFPR(ft,format),format));\n"); | |
8ad57737 JSC |
1878 | break ; |
1879 | ||
8bae0a0c JSC |
1880 | case FPRECIP: |
1881 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1882 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1883 | printf(" else\n"); | |
1884 | printf(" StoreFPR(destreg,format,Recip(ValueFPR(fs,format),format));\n"); | |
8ad57737 JSC |
1885 | break ; |
1886 | ||
8bae0a0c JSC |
1887 | case FPSQRT: |
1888 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1889 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1890 | printf(" else\n"); | |
1891 | printf(" StoreFPR(destreg,format,%s(SquareRoot(ValueFPR(fs,format),format)));\n",((MIPS_DECODE[loop].flags & RECIP) ? "Recip" : "")); | |
8ad57737 JSC |
1892 | break ; |
1893 | ||
8bae0a0c JSC |
1894 | case FPCEIL: |
1895 | case FPFLOOR: | |
1896 | case FPTRUNC: | |
1897 | case FPROUND: | |
1898 | { | |
1899 | char *op = ""; | |
1900 | char *type = ""; | |
8ad57737 | 1901 | |
8bae0a0c JSC |
1902 | switch (MIPS_DECODE[loop].type) { |
1903 | case FPCEIL: | |
1904 | op = "FP_RM_TOPINF"; | |
1905 | break; | |
1906 | case FPFLOOR: | |
1907 | op = "FP_RM_TOMINF"; | |
1908 | break; | |
1909 | case FPTRUNC: | |
1910 | op = "FP_RM_TOZERO"; | |
1911 | break; | |
1912 | case FPROUND: | |
1913 | op = "FP_RM_NEAREST"; | |
1914 | break; | |
1915 | default: | |
1916 | fprintf(stderr,"Error: Handled missing for FP reason code %d\n",MIPS_DECODE[loop].type); | |
1917 | exit(1); | |
1918 | } | |
8ad57737 | 1919 | |
8bae0a0c JSC |
1920 | switch (GETDATASIZE()) { |
1921 | case WORD : | |
1922 | type = "fmt_word"; | |
1923 | break; | |
1924 | case DOUBLEWORD : | |
1925 | type = "fmt_long"; | |
1926 | break; | |
1927 | default: | |
1928 | fprintf(stderr,"Error in instruction encoding table for FP %s operation (not WORD or DOUBLEWORD)\n",op); | |
1929 | exit(1); | |
1930 | } | |
1931 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1932 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1933 | printf(" else\n"); | |
1934 | printf(" StoreFPR(destreg,%s,Convert(%s,ValueFPR(fs,format),format,%s));\n",type,op,type); | |
1935 | } | |
8ad57737 JSC |
1936 | break ; |
1937 | ||
8bae0a0c JSC |
1938 | case FPCONVERT: |
1939 | { | |
1940 | char *type = ""; | |
1941 | switch (GETDATASIZE()) { | |
1942 | case SINGLE: | |
1943 | type = "fmt_single"; | |
1944 | break; | |
1945 | case DOUBLE: | |
1946 | type = "fmt_double"; | |
1947 | break; | |
1948 | case WORD: | |
1949 | type = "fmt_word"; | |
1950 | break; | |
1951 | case DOUBLEWORD: | |
1952 | type = "fmt_long"; | |
1953 | break; | |
1954 | default : | |
1955 | fprintf(stderr,"Error: Unknown data size %d in FPCONVERT instruction\n",GETDATASIZE()); | |
1956 | exit(1); | |
1957 | } | |
8ad57737 | 1958 | |
8bae0a0c JSC |
1959 | /* Not all combinations of conversion are valid at the |
1960 | moment: When converting to a fixed-point format, only | |
1961 | floating-point sources are allowed. */ | |
1962 | printf(" if ((format == %s) | %s)\n",type,((MIPS_DECODE[loop].flags & FIXED) ? "((format == fmt_long) || (format == fmt_word))": "0")); | |
1963 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1964 | printf(" else\n"); | |
1965 | printf(" StoreFPR(destreg,%s,Convert(GETRM(),ValueFPR(fs,format),format,%s));\n",type,type); | |
1966 | } | |
8ad57737 JSC |
1967 | break ; |
1968 | ||
8bae0a0c JSC |
1969 | case FPSUB: |
1970 | if (MIPS_DECODE[loop].flags & MULTIPLY) { | |
1971 | char *type = ""; | |
1972 | switch (GETDATASIZE()) { | |
1973 | case SINGLE: | |
1974 | type = "fmt_single"; | |
1975 | break; | |
1976 | case DOUBLE: | |
1977 | type = "fmt_double"; | |
1978 | break; | |
1979 | default: | |
1980 | fprintf(stderr,"Error: Invalid data size %d for FPSUB operation\n",GETDATASIZE()); | |
1981 | exit(1); | |
1982 | } | |
1983 | printf(" StoreFPR(destreg,%s,%s(Sub(Multiply(ValueFPR(fs,%s),ValueFPR(ft,%s),%s),ValueFPR(fr,%s),%s),%s));\n",type,((MIPS_DECODE[loop].flags & NOT) ? "Negate" : ""),type,type,type,type,type,type); | |
1984 | } else { | |
1985 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
1986 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
1987 | printf(" else\n"); | |
1988 | printf(" StoreFPR(destreg,format,Sub(ValueFPR(fs,format),ValueFPR(ft,format),format));\n"); | |
1989 | } | |
8ad57737 JSC |
1990 | break ; |
1991 | ||
8bae0a0c JSC |
1992 | case FPADD: |
1993 | if (MIPS_DECODE[loop].flags & MULTIPLY) { | |
1994 | char *type = ""; | |
1995 | switch (GETDATASIZE()) { | |
1996 | case SINGLE: | |
1997 | type = "fmt_single"; | |
1998 | break; | |
1999 | case DOUBLE: | |
2000 | type = "fmt_double"; | |
2001 | break; | |
2002 | default: | |
2003 | fprintf(stderr,"Error: Invalid data size %d for FPADD operation in instruction table\n",GETDATASIZE()); | |
2004 | exit(1); | |
2005 | } | |
2006 | printf(" StoreFPR(destreg,%s,%s(Add(Multiply(ValueFPR(fs,%s),ValueFPR(ft,%s),%s),ValueFPR(fr,%s),%s),%s));\n",type,((MIPS_DECODE[loop].flags & NOT) ? "Negate" : ""),type,type,type,type,type,type); | |
2007 | } else { | |
2008 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
2009 | printf(" SignalException(ReservedInstruction,instruction);\n"); | |
2010 | printf(" else\n"); | |
2011 | printf(" StoreFPR(destreg,format,Add(ValueFPR(fs,format),ValueFPR(ft,format),format));\n"); | |
2012 | } | |
8ad57737 JSC |
2013 | break ; |
2014 | ||
8bae0a0c | 2015 | case FPCOMPARE: |
8ad57737 JSC |
2016 | /* For the MIPS I,II or III there *MUST* be at least one |
2017 | instruction between the compare that sets a condition code | |
8bae0a0c JSC |
2018 | and the branch that tests it. NOTE: However the hardware |
2019 | does not detect this condition. */ | |
2020 | /* Explicitly limit the operation to S and D formats: */ | |
2021 | printf(" if ((format != fmt_single) && (format != fmt_double))\n"); | |
2022 | printf(" SignalException(ReservedInstruction,instruction);\n") ; | |
2023 | printf(" else {\n"); | |
2024 | if (doisa < 4) { | |
2025 | printf(" if ((cmpflags & (1 << 3)) || (condition_code != 0))\n"); | |
2026 | printf(" SignalException(ReservedInstruction,instruction);\n") ; | |
2027 | printf(" else\n"); | |
2028 | } | |
2029 | printf(" {\n"); | |
2030 | printf(" int ignore = 0;\n"); | |
2031 | printf(" int less = 0;\n"); | |
2032 | printf(" int equal = 0;\n"); | |
2033 | printf(" int unordered = 1;\n"); | |
e871dd18 JSC |
2034 | printf(" uword64 ofs = ValueFPR(fs,format);\n"); |
2035 | printf(" uword64 oft = ValueFPR(ft,format);\n"); | |
8bae0a0c JSC |
2036 | printf(" if (NaN(ofs,format) || NaN(oft,format)) {\n"); |
2037 | printf(" if (FCSR & FP_ENABLE(IO)) {\n"); | |
2038 | printf(" FCSR |= FP_CAUSE(IO);\n"); | |
2039 | printf(" SignalException(FPE);\n"); | |
2040 | printf(" ignore = 1;\n"); | |
2041 | printf(" }\n"); | |
2042 | printf(" } else {\n"); | |
2043 | printf(" less = Less(ofs,oft,format);\n"); | |
2044 | printf(" equal = Equal(ofs,oft,format);\n"); | |
2045 | printf(" unordered = 0;\n"); | |
2046 | printf(" }\n"); | |
2047 | printf(" if (!ignore) {\n"); | |
2048 | printf(" int condition = (((cmpflags & (1 << 2)) && less) || ((cmpflags & (1 << 1)) && equal) || ((cmpflags & (1 << 0)) && unordered));\n"); | |
2049 | printf(" SETFCC(condition_code,condition);\n"); | |
2050 | printf(" }\n"); | |
2051 | printf(" }\n"); | |
2052 | printf(" }\n"); | |
8ad57737 JSC |
2053 | break ; |
2054 | ||
8bae0a0c | 2055 | default: |
8ad57737 JSC |
2056 | fprintf(stderr,"Unrecognised opcode type %d\n",MIPS_DECODE[loop].type) ; |
2057 | exit(6) ; | |
2058 | } | |
2059 | printf(" }\n") ; | |
2060 | printf(" }\n") ; | |
2061 | printf(" break ;\n") ; | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | printf("default : /* Unrecognised instruction */\n") ; | |
2066 | printf(" SignalException(ReservedInstruction,instruction);\n") ; | |
2067 | printf(" break ;\n") ; | |
2068 | printf("}\n}\n") ; | |
2069 | printf("#endif /* simulator engine */\n"); | |
2070 | ||
2071 | return ; | |
2072 | } | |
2073 | ||
2074 | /*---------------------------------------------------------------------------*/ | |
2075 | ||
2076 | /* The command-line feature controls are presented in a similar style | |
2077 | to those offered by GCC, in the aim of providing a consistent | |
2078 | interface to the user. */ | |
2079 | typedef enum { | |
2080 | T_NONE, /* no argument - mask and value fields control "feature" definition */ | |
2081 | T_NUM, /* numeric argument - optionally preceded by '=' - mask field defines maximum value */ | |
2082 | T_STRING /* string argument - optionally prcededed by '=' */ | |
2083 | } mactypes; | |
2084 | ||
2085 | struct { | |
2086 | char *name; | |
2087 | mactypes type; | |
2088 | unsigned int mask; | |
2089 | unsigned int value; | |
2090 | char *desc; | |
2091 | } machine_options[] = { | |
2092 | {"ips", T_NUM, MASK_ISA,0,"\tSelect MIPS ISA version"}, | |
2093 | {"cpu", T_STRING,0,0,"\t\tSelect particular MIPS architecture"}, | |
2094 | {"gp64", T_NONE, FEATURE_GP64,FEATURE_GP64,"\t\t\tSelect 64bit GP registers"}, | |
2095 | {"gp32", T_NONE, FEATURE_GP64,0,"\t\t\tSelect 32bit GP registers"}, | |
2096 | {"no-fp", T_NONE, FEATURE_HASFPU,0,"\t\tDisable FP simulation"}, | |
8ad57737 JSC |
2097 | {"single-float",T_NONE, (FEATURE_FPSINGLE | FEATURE_HASFPU),(FEATURE_FPSINGLE | FEATURE_HASFPU),"\t\tSelect single precision only FPU"}, |
2098 | {"double-float",T_NONE, (FEATURE_FPSINGLE | FEATURE_HASFPU),FEATURE_HASFPU,"\t\tSelect double precision FPU"}, | |
2099 | {0, T_NONE, 0,0} | |
2100 | }; | |
2101 | ||
2102 | /* The following architecture identies are those accepted by the "-mcpu" option: */ | |
2103 | struct architectures { | |
2104 | const char *name; /* ASCII string identifier for command-line, no white-space allowed */ | |
2105 | unsigned int idflag; /* or-ed into "isa" value */ | |
2106 | }; | |
2107 | ||
2108 | static const struct architectures available_architectures[] = { | |
2109 | {"4100",ARCH_VR4100}, /* NEC MIPS VR4100 */ | |
2110 | {0, 0} /* terminator */ | |
2111 | }; | |
2112 | ||
2113 | /*---------------------------------------------------------------------------*/ | |
2114 | ||
2115 | static void | |
2116 | usage(name) | |
2117 | char *name; | |
2118 | { | |
2119 | int loop; | |
2120 | ||
2121 | fprintf(stderr,"%s: Construct a MIPS simulator engine.\n",name); | |
2122 | ||
2123 | fprintf(stderr,"\ | |
2124 | The output of this program is a block of 'C' code designed to be\n\ | |
2125 | included into the main simulation control loop of a device specific\n\ | |
2126 | simulator.\n"); | |
2127 | ||
2128 | fprintf(stderr,"\nOptions:\n"); | |
2129 | fprintf(stderr," -h --help\t\tProvide this help text\n"); | |
2130 | fprintf(stderr," -f --fast\t\tProvide the fastest possible engine (i.e. no statistics)\n"); | |
2131 | fprintf(stderr," -w --warnings\t\tEnable all the simulator engine warnings\n"); | |
2132 | ||
2133 | for (loop = 0; (machine_options[loop].name != 0); loop++) { | |
2134 | fprintf(stderr," -m%s",machine_options[loop].name); | |
2135 | switch (machine_options[loop].type) { | |
2136 | case T_NUM : | |
2137 | fprintf(stderr,"N (range 0..%d)",machine_options[loop].mask); | |
2138 | case T_NONE : | |
2139 | break; | |
2140 | ||
2141 | case T_STRING : | |
2142 | fprintf(stderr,"=name"); | |
2143 | break; | |
2144 | ||
2145 | default : | |
2146 | fprintf(stderr,"%s: FATAL error: unrecognised machine option type ID %d\n",machine_options[loop].type); | |
2147 | exit(1); | |
2148 | } | |
2149 | fprintf(stderr,"%s\n",machine_options[loop].desc); | |
2150 | } | |
2151 | ||
2152 | fprintf(stderr,"\nAvailable \"-mcpu\" architectures: "); | |
2153 | for (loop = 0; (available_architectures[loop].name != 0); loop++) | |
2154 | fprintf(stderr,"%s ",available_architectures[loop].name); | |
2155 | fprintf(stderr,"\n\n"); | |
2156 | ||
2157 | fprintf(stderr,"\ | |
2158 | The \"trace\" and \"warnings\" options do not define the output stream.\n\ | |
2159 | They only inform the code that includes the constructed engine to provide\n\ | |
2160 | the required features.\n\n\ | |
2161 | The \"-mips0\" option forces the construction of a simulator supporting\n\ | |
2162 | the highest available MIPS ISA supported.\n"); | |
2163 | ||
2164 | return; | |
2165 | } | |
2166 | ||
2167 | /*---------------------------------------------------------------------------*/ | |
2168 | ||
2169 | int | |
2170 | main(argc,argv) | |
2171 | int argc; | |
2172 | char **argv; | |
2173 | { | |
2174 | int c; | |
2175 | char *progname = argv[0]; | |
2176 | unsigned int doarch = DEF_ISA; | |
2177 | unsigned int features = 0; /* default state */ | |
2178 | ||
2179 | if (DEF_FP) | |
2180 | features |= FEATURE_HASFPU; | |
2181 | if (!DEF_PROC64) | |
2182 | features |= FEATURE_PROC32; | |
2183 | if (DEF_FPSINGLE) | |
2184 | features |= FEATURE_FPSINGLE; | |
2185 | ||
2186 | if (features & FEATURE_PROC32) | |
8bae0a0c | 2187 | features &= ~FEATURE_GP64; |
8ad57737 | 2188 | else |
8bae0a0c | 2189 | features |= FEATURE_GP64; |
8ad57737 JSC |
2190 | |
2191 | while (1) { | |
2192 | int this_option_optind = (optind ? optind : 1); | |
2193 | int option_index = 0; | |
2194 | static struct option cmdline[] = { | |
2195 | {"fast", 0,0,'f'}, | |
2196 | {"help", 0,0,'h'}, | |
2197 | {"warnings",0,0,'w'}, | |
2198 | {0, 0,0,0} | |
2199 | }; | |
2200 | ||
2201 | c = getopt_long(argc,argv,"hm:tw",cmdline,&option_index); | |
2202 | if (c == -1) | |
2203 | break ; /* out of the while loop */ | |
2204 | ||
2205 | switch (c) { | |
2206 | case 'h' : /* help */ | |
2207 | usage(progname); | |
2208 | exit(0); | |
2209 | ||
2210 | case 'f' : /* fast */ | |
2211 | features |= FEATURE_FAST; | |
2212 | break; | |
2213 | ||
2214 | case 'w' : /* warnings */ | |
2215 | features |= FEATURE_WARNINGS; | |
2216 | /* TODO: Future extension: Allow better control over the warnings generated: | |
2217 | disable warnings -wnone ~FEATURE_WARNINGS | |
2218 | all possible warnings -wall FEATURE_WARNINGS | |
2219 | pipeline stall occuring -wstall FEATURE_WARN_STALL | |
2220 | LO/HI corruption -wlo or -whi or -wlohi or -whilo FEATURE_WARN_HILO | |
2221 | write to zero -wzero FEATURE_WARN_ZERO actually performed in external code - though we should set a manifest | |
2222 | bad r31 use -wr31 FEATURE_WARN_R31 | |
2223 | undefined results -wresult FEATURE_WARN_RESULT | |
2224 | */ | |
2225 | break; | |
2226 | ||
2227 | case 'm' : /* machine options */ | |
2228 | { | |
2229 | int loop; | |
2230 | ||
2231 | for (loop = 0; (machine_options[loop].name != 0); loop++) | |
2232 | if (strncmp(machine_options[loop].name,optarg,strlen(machine_options[loop].name)) == 0) { | |
2233 | char *loptarg = (optarg + strlen(machine_options[loop].name)); | |
2234 | switch (machine_options[loop].type) { | |
2235 | case T_NONE : | |
2236 | if (*loptarg) { | |
2237 | fprintf(stderr,"%s: Spurious characters \"%s\" at end of -m%s option\n",progname,loptarg,machine_options[loop].name); | |
2238 | exit(1); | |
2239 | } | |
2240 | features &= ~(machine_options[loop].mask); | |
2241 | features |= machine_options[loop].value; | |
2242 | break; | |
2243 | ||
2244 | case T_NUM : | |
2245 | if (*loptarg && *loptarg == '=') | |
2246 | loptarg++; | |
2247 | ||
2248 | if (strcmp(machine_options[loop].name,"ips") == 0) { | |
2249 | unsigned int num; | |
2250 | ||
2251 | if (!*loptarg) { | |
2252 | fprintf(stderr,"%s: ISA number expected after -mips\n",progname); | |
2253 | exit(1); | |
2254 | } | |
2255 | ||
2256 | num = strtoul(loptarg,&loptarg,10); | |
2257 | ||
2258 | if ((num == ULONG_MAX) && (errno = ERANGE)) { | |
2259 | fprintf(stderr,"%s: Invalid number given to -mips option\n",progname); | |
2260 | exit(1); | |
2261 | } | |
2262 | ||
2263 | if (*loptarg) { | |
2264 | fprintf(stderr,"%s: Spurious trailing characters after ISA number \"%s\"\n",progname,loptarg); | |
2265 | exit(1); | |
2266 | } | |
2267 | ||
2268 | if (num > MASK_ISA) { | |
2269 | fprintf(stderr,"%s: ISA number %d outside acceptable range (0..%d)\n",progname,num,MASK_ISA); | |
2270 | exit(1); | |
2271 | } | |
2272 | ||
2273 | doarch = ((doarch & ~MASK_ISA) | num); | |
2274 | if ((num == 0) || (num > 2)) { | |
8bae0a0c JSC |
2275 | if ((features & FEATURE_PROC32) || !(features & FEATURE_GP64)) |
2276 | fprintf(stderr,"%s: Warning: -mips%d forcing -mgp64\n",progname,num); | |
2277 | features |= FEATURE_GP64; | |
8ad57737 JSC |
2278 | features &= ~FEATURE_PROC32; |
2279 | } else { | |
8bae0a0c JSC |
2280 | if (!(features & FEATURE_PROC32) || (features & FEATURE_GP64)) |
2281 | fprintf(stderr,"%s: Warning: -mips%d forcing -mgp32\n",progname,num); | |
2282 | features &= ~FEATURE_GP64; | |
8ad57737 JSC |
2283 | features |= FEATURE_PROC32; |
2284 | } | |
2285 | } else { | |
2286 | fprintf(stderr,"%s: FATAL: Unrecognised (numeric) machine option -m%s\n",progname,optarg); | |
2287 | exit(1); | |
2288 | } | |
2289 | break; | |
2290 | ||
2291 | case T_STRING : | |
2292 | if (*loptarg && *loptarg == '=') | |
2293 | loptarg++; | |
2294 | ||
2295 | if (strcmp(machine_options[loop].name,"cpu") == 0) { | |
2296 | int archloop; | |
2297 | ||
2298 | if (!*loptarg) { | |
2299 | fprintf(stderr,"%s: Architecture identifier expected after -mcpu\n",progname); | |
2300 | exit(1); | |
2301 | } | |
2302 | ||
2303 | for (archloop = 0; (available_architectures[archloop].name != 0); archloop++) { | |
2304 | if ((*loptarg == 'v') || (*loptarg == 'V')) | |
2305 | *loptarg++; | |
2306 | ||
2307 | if (*loptarg && (*loptarg == 'r') || (*loptarg == 'R')) | |
2308 | *loptarg++; | |
2309 | ||
2310 | if (strcmp(available_architectures[archloop].name,loptarg) == 0) { | |
2311 | doarch |= available_architectures[archloop].idflag; | |
2312 | break; | |
2313 | } | |
2314 | } | |
2315 | ||
2316 | if (available_architectures[archloop].name == 0) { | |
2317 | fprintf(stderr,"%s: Unrecognised MIPS architecture \"%s\"\n",progname,loptarg); | |
2318 | exit(1); | |
2319 | } | |
2320 | } else { | |
2321 | fprintf(stderr,"%s: FATAL: Unrecognised (string) machine option -m%s\n",progname,optarg); | |
2322 | exit(1); | |
2323 | } | |
2324 | break; | |
2325 | ||
2326 | default : | |
2327 | fprintf(stderr,"%s: FATAL error: unrecognised machine option type ID %d\n",progname,machine_options[loop].type); | |
2328 | exit(1); | |
2329 | } | |
2330 | break; | |
2331 | } | |
2332 | ||
2333 | if (machine_options[loop].name == 0) { | |
2334 | fprintf(stderr,"%s: Unrecognised option: -m%s\n",progname,optarg); | |
2335 | exit(1); | |
2336 | } | |
2337 | } | |
2338 | break; | |
2339 | ||
2340 | case '?' : | |
2341 | /* An error message should already have been displayed */ | |
2342 | exit(1); | |
2343 | ||
2344 | default : | |
2345 | fprintf(stderr,"%s: FATAL: getopt returned unrecognised code 0x%08X\n",progname,c); | |
2346 | exit(1); | |
2347 | } | |
2348 | } | |
2349 | ||
2350 | if (optind < argc) { | |
2351 | fprintf(stderr,"%s: Spurios non-option arguments ",progname); | |
2352 | while (optind < argc) | |
2353 | fprintf(stderr,"\"%s\" ",argv[optind++]); | |
2354 | fprintf(stderr,"\n"); | |
2355 | exit(1); | |
2356 | } | |
2357 | ||
2358 | if ((features & FEATURE_FAST) && (features & FEATURE_WARNINGS)) | |
2359 | fprintf(stderr,"Warning: Fast model generation selected, along with trace or warnings.\n"); | |
2360 | ||
2361 | process_instructions(doarch,features) ; | |
2362 | return(0) ; | |
2363 | } | |
2364 | ||
2365 | /*---------------------------------------------------------------------------*/ | |
2366 | /*> EOF gencode.c <*/ |