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7649aa50 | 1 | @c Copyright 1991, 1992, 1993, 1994, 1995, 1997, 2001 |
f7e42eb4 | 2 | @c Free Software Foundation, Inc. |
252b5132 RH |
3 | @c This is part of the GAS manual. |
4 | @c For copying conditions, see the file as.texinfo. | |
5 | @page | |
6 | @node SH-Dependent | |
7 | @chapter Hitachi SH Dependent Features | |
8 | ||
9 | @cindex SH support | |
10 | @menu | |
11 | * SH Options:: Options | |
12 | * SH Syntax:: Syntax | |
13 | * SH Floating Point:: Floating Point | |
14 | * SH Directives:: SH Machine Directives | |
15 | * SH Opcodes:: Opcodes | |
16 | @end menu | |
17 | ||
18 | @node SH Options | |
19 | @section Options | |
20 | ||
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21 | @cindex SH options |
22 | @cindex options, SH | |
23 | @code{@value{AS}} has following command-line options for the Hitachi | |
252b5132 RH |
24 | SH family. |
25 | ||
7649aa50 NC |
26 | @table @code |
27 | @kindex -little | |
28 | @kindex -big | |
29 | @kindex -relax | |
30 | @kindex -small | |
31 | @kindex -dsp | |
32 | ||
33 | @item -little | |
34 | Generate little endian code. | |
35 | ||
36 | @item -big | |
37 | Generate big endian code. | |
38 | ||
39 | @item -relax | |
40 | Alter jump instructions for long displacements. | |
41 | ||
42 | @item -small | |
43 | Align sections to 4 byte boundaries, not 16. | |
44 | ||
45 | @item -dsp | |
46 | Enable sh-dsp insns, and disable sh3e / sh4 insns. | |
47 | ||
48 | @end table | |
49 | ||
252b5132 RH |
50 | @node SH Syntax |
51 | @section Syntax | |
52 | ||
53 | @menu | |
54 | * SH-Chars:: Special Characters | |
55 | * SH-Regs:: Register Names | |
56 | * SH-Addressing:: Addressing Modes | |
57 | @end menu | |
58 | ||
59 | @node SH-Chars | |
60 | @subsection Special Characters | |
61 | ||
62 | @cindex line comment character, SH | |
63 | @cindex SH line comment character | |
64 | @samp{!} is the line comment character. | |
65 | ||
66 | @cindex line separator, SH | |
67 | @cindex statement separator, SH | |
68 | @cindex SH line separator | |
69 | You can use @samp{;} instead of a newline to separate statements. | |
70 | ||
71 | @cindex symbol names, @samp{$} in | |
72 | @cindex @code{$} in symbol names | |
73 | Since @samp{$} has no special meaning, you may use it in symbol names. | |
74 | ||
75 | @node SH-Regs | |
76 | @subsection Register Names | |
77 | ||
78 | @cindex SH registers | |
79 | @cindex registers, SH | |
80 | You can use the predefined symbols @samp{r0}, @samp{r1}, @samp{r2}, | |
81 | @samp{r3}, @samp{r4}, @samp{r5}, @samp{r6}, @samp{r7}, @samp{r8}, | |
82 | @samp{r9}, @samp{r10}, @samp{r11}, @samp{r12}, @samp{r13}, @samp{r14}, | |
83 | and @samp{r15} to refer to the SH registers. | |
84 | ||
85 | The SH also has these control registers: | |
86 | ||
87 | @table @code | |
88 | @item pr | |
89 | procedure register (holds return address) | |
90 | ||
91 | @item pc | |
92 | program counter | |
93 | ||
94 | @item mach | |
95 | @itemx macl | |
96 | high and low multiply accumulator registers | |
97 | ||
98 | @item sr | |
99 | status register | |
100 | ||
101 | @item gbr | |
102 | global base register | |
103 | ||
104 | @item vbr | |
105 | vector base register (for interrupt vectors) | |
106 | @end table | |
107 | ||
108 | @node SH-Addressing | |
109 | @subsection Addressing Modes | |
110 | ||
111 | @cindex addressing modes, SH | |
112 | @cindex SH addressing modes | |
113 | @code{@value{AS}} understands the following addressing modes for the SH. | |
114 | @code{R@var{n}} in the following refers to any of the numbered | |
115 | registers, but @emph{not} the control registers. | |
116 | ||
117 | @table @code | |
118 | @item R@var{n} | |
119 | Register direct | |
120 | ||
121 | @item @@R@var{n} | |
122 | Register indirect | |
123 | ||
124 | @item @@-R@var{n} | |
125 | Register indirect with pre-decrement | |
126 | ||
127 | @item @@R@var{n}+ | |
128 | Register indirect with post-increment | |
129 | ||
130 | @item @@(@var{disp}, R@var{n}) | |
131 | Register indirect with displacement | |
132 | ||
133 | @item @@(R0, R@var{n}) | |
134 | Register indexed | |
135 | ||
136 | @item @@(@var{disp}, GBR) | |
137 | @code{GBR} offset | |
138 | ||
139 | @item @@(R0, GBR) | |
140 | GBR indexed | |
141 | ||
142 | @item @var{addr} | |
143 | @itemx @@(@var{disp}, PC) | |
144 | PC relative address (for branch or for addressing memory). The | |
145 | @code{@value{AS}} implementation allows you to use the simpler form | |
146 | @var{addr} anywhere a PC relative address is called for; the alternate | |
147 | form is supported for compatibility with other assemblers. | |
148 | ||
149 | @item #@var{imm} | |
150 | Immediate data | |
151 | @end table | |
152 | ||
153 | @node SH Floating Point | |
154 | @section Floating Point | |
155 | ||
156 | @cindex floating point, SH (@sc{ieee}) | |
157 | @cindex SH floating point (@sc{ieee}) | |
158 | The SH family has no hardware floating point, but the @code{.float} | |
159 | directive generates @sc{ieee} floating-point numbers for compatibility | |
160 | with other development tools. | |
161 | ||
162 | @node SH Directives | |
163 | @section SH Machine Directives | |
164 | ||
165 | @cindex SH machine directives | |
166 | @cindex machine directives, SH | |
167 | @cindex @code{uaword} directive, SH | |
168 | @cindex @code{ualong} directive, SH | |
169 | ||
170 | @table @code | |
171 | @item uaword | |
172 | @itemx ualong | |
173 | @code{@value{AS}} will issue a warning when a misaligned @code{.word} or | |
174 | @code{.long} directive is used. You may use @code{.uaword} or | |
175 | @code{.ualong} to indicate that the value is intentionally misaligned. | |
176 | @end table | |
177 | ||
178 | @node SH Opcodes | |
179 | @section Opcodes | |
180 | ||
181 | @cindex SH opcode summary | |
182 | @cindex opcode summary, SH | |
183 | @cindex mnemonics, SH | |
184 | @cindex instruction summary, SH | |
185 | For detailed information on the SH machine instruction set, see | |
186 | @cite{SH-Microcomputer User's Manual} (Hitachi Micro Systems, Inc.). | |
187 | ||
188 | @code{@value{AS}} implements all the standard SH opcodes. No additional | |
189 | pseudo-instructions are needed on this family. Note, however, that | |
190 | because @code{@value{AS}} supports a simpler form of PC-relative | |
191 | addressing, you may simply write (for example) | |
192 | ||
193 | @example | |
194 | mov.l bar,r0 | |
195 | @end example | |
196 | ||
197 | @noindent | |
198 | where other assemblers might require an explicit displacement to | |
199 | @code{bar} from the program counter: | |
200 | ||
201 | @example | |
202 | mov.l @@(@var{disp}, PC) | |
203 | @end example | |
204 | ||
205 | @ifset SMALL | |
206 | @c this table, due to the multi-col faking and hardcoded order, looks silly | |
207 | @c except in smallbook. See comments below "@set SMALL" near top of this file. | |
208 | ||
209 | Here is a summary of SH opcodes: | |
210 | ||
211 | @page | |
212 | @smallexample | |
213 | @i{Legend:} | |
214 | Rn @r{a numbered register} | |
215 | Rm @r{another numbered register} | |
216 | #imm @r{immediate data} | |
217 | disp @r{displacement} | |
218 | disp8 @r{8-bit displacement} | |
219 | disp12 @r{12-bit displacement} | |
220 | ||
221 | add #imm,Rn lds.l @@Rn+,PR | |
222 | add Rm,Rn mac.w @@Rm+,@@Rn+ | |
223 | addc Rm,Rn mov #imm,Rn | |
224 | addv Rm,Rn mov Rm,Rn | |
225 | and #imm,R0 mov.b Rm,@@(R0,Rn) | |
226 | and Rm,Rn mov.b Rm,@@-Rn | |
227 | and.b #imm,@@(R0,GBR) mov.b Rm,@@Rn | |
228 | bf disp8 mov.b @@(disp,Rm),R0 | |
229 | bra disp12 mov.b @@(disp,GBR),R0 | |
230 | bsr disp12 mov.b @@(R0,Rm),Rn | |
231 | bt disp8 mov.b @@Rm+,Rn | |
232 | clrmac mov.b @@Rm,Rn | |
233 | clrt mov.b R0,@@(disp,Rm) | |
234 | cmp/eq #imm,R0 mov.b R0,@@(disp,GBR) | |
235 | cmp/eq Rm,Rn mov.l Rm,@@(disp,Rn) | |
236 | cmp/ge Rm,Rn mov.l Rm,@@(R0,Rn) | |
237 | cmp/gt Rm,Rn mov.l Rm,@@-Rn | |
238 | cmp/hi Rm,Rn mov.l Rm,@@Rn | |
239 | cmp/hs Rm,Rn mov.l @@(disp,Rn),Rm | |
240 | cmp/pl Rn mov.l @@(disp,GBR),R0 | |
241 | cmp/pz Rn mov.l @@(disp,PC),Rn | |
242 | cmp/str Rm,Rn mov.l @@(R0,Rm),Rn | |
243 | div0s Rm,Rn mov.l @@Rm+,Rn | |
244 | div0u mov.l @@Rm,Rn | |
245 | div1 Rm,Rn mov.l R0,@@(disp,GBR) | |
246 | exts.b Rm,Rn mov.w Rm,@@(R0,Rn) | |
247 | exts.w Rm,Rn mov.w Rm,@@-Rn | |
248 | extu.b Rm,Rn mov.w Rm,@@Rn | |
249 | extu.w Rm,Rn mov.w @@(disp,Rm),R0 | |
250 | jmp @@Rn mov.w @@(disp,GBR),R0 | |
251 | jsr @@Rn mov.w @@(disp,PC),Rn | |
252 | ldc Rn,GBR mov.w @@(R0,Rm),Rn | |
253 | ldc Rn,SR mov.w @@Rm+,Rn | |
254 | ldc Rn,VBR mov.w @@Rm,Rn | |
255 | ldc.l @@Rn+,GBR mov.w R0,@@(disp,Rm) | |
256 | ldc.l @@Rn+,SR mov.w R0,@@(disp,GBR) | |
257 | ldc.l @@Rn+,VBR mova @@(disp,PC),R0 | |
258 | lds Rn,MACH movt Rn | |
259 | lds Rn,MACL muls Rm,Rn | |
260 | lds Rn,PR mulu Rm,Rn | |
261 | lds.l @@Rn+,MACH neg Rm,Rn | |
262 | lds.l @@Rn+,MACL negc Rm,Rn | |
263 | @page | |
264 | nop stc VBR,Rn | |
265 | not Rm,Rn stc.l GBR,@@-Rn | |
266 | or #imm,R0 stc.l SR,@@-Rn | |
267 | or Rm,Rn stc.l VBR,@@-Rn | |
268 | or.b #imm,@@(R0,GBR) sts MACH,Rn | |
269 | rotcl Rn sts MACL,Rn | |
270 | rotcr Rn sts PR,Rn | |
271 | rotl Rn sts.l MACH,@@-Rn | |
272 | rotr Rn sts.l MACL,@@-Rn | |
273 | rte sts.l PR,@@-Rn | |
274 | rts sub Rm,Rn | |
275 | sett subc Rm,Rn | |
276 | shal Rn subv Rm,Rn | |
277 | shar Rn swap.b Rm,Rn | |
278 | shll Rn swap.w Rm,Rn | |
279 | shll16 Rn tas.b @@Rn | |
280 | shll2 Rn trapa #imm | |
281 | shll8 Rn tst #imm,R0 | |
282 | shlr Rn tst Rm,Rn | |
283 | shlr16 Rn tst.b #imm,@@(R0,GBR) | |
284 | shlr2 Rn xor #imm,R0 | |
285 | shlr8 Rn xor Rm,Rn | |
286 | sleep xor.b #imm,@@(R0,GBR) | |
287 | stc GBR,Rn xtrct Rm,Rn | |
288 | stc SR,Rn | |
289 | @end smallexample | |
290 | @end ifset | |
291 | ||
292 | @ifset Hitachi-all | |
293 | @ifclear GENERIC | |
294 | @raisesections | |
295 | @end ifclear | |
296 | @end ifset | |
297 |