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c2dcd04e | 1 | @c Copyright (C) 1991, 1992, 1993, 1994, 1995, 2003 Free Software Foundation, Inc. |
252b5132 RH |
2 | @c This is part of the GAS manual. |
3 | @c For copying conditions, see the file as.texinfo. | |
4 | @ifset GENERIC | |
5 | @page | |
6 | @end ifset | |
7 | @node H8/300-Dependent | |
8 | @chapter H8/300 Dependent Features | |
9 | ||
10 | @cindex H8/300 support | |
11 | @menu | |
12 | * H8/300 Options:: Options | |
13 | * H8/300 Syntax:: Syntax | |
14 | * H8/300 Floating Point:: Floating Point | |
15 | * H8/300 Directives:: H8/300 Machine Directives | |
16 | * H8/300 Opcodes:: Opcodes | |
17 | @end menu | |
18 | ||
19 | @node H8/300 Options | |
20 | @section Options | |
21 | ||
22 | @cindex H8/300 options (none) | |
23 | @cindex options, H8/300 (none) | |
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24 | @code{@value{AS}} has no additional command-line options for the |
25 | Renesas (formerly Hitachi) H8/300 family. | |
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26 | |
27 | @node H8/300 Syntax | |
28 | @section Syntax | |
29 | @menu | |
30 | * H8/300-Chars:: Special Characters | |
31 | * H8/300-Regs:: Register Names | |
32 | * H8/300-Addressing:: Addressing Modes | |
33 | @end menu | |
34 | ||
35 | @node H8/300-Chars | |
36 | @subsection Special Characters | |
37 | ||
38 | @cindex line comment character, H8/300 | |
39 | @cindex H8/300 line comment character | |
40 | @samp{;} is the line comment character. | |
41 | ||
42 | @cindex line separator, H8/300 | |
43 | @cindex statement separator, H8/300 | |
44 | @cindex H8/300 line separator | |
45 | @samp{$} can be used instead of a newline to separate statements. | |
46 | Therefore @emph{you may not use @samp{$} in symbol names} on the H8/300. | |
47 | ||
48 | @node H8/300-Regs | |
49 | @subsection Register Names | |
50 | ||
51 | @cindex H8/300 registers | |
52 | @cindex register names, H8/300 | |
53 | You can use predefined symbols of the form @samp{r@var{n}h} and | |
54 | @samp{r@var{n}l} to refer to the H8/300 registers as sixteen 8-bit | |
55 | general-purpose registers. @var{n} is a digit from @samp{0} to | |
56 | @samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid | |
57 | register names. | |
58 | ||
59 | You can also use the eight predefined symbols @samp{r@var{n}} to refer | |
60 | to the H8/300 registers as 16-bit registers (you must use this form for | |
61 | addressing). | |
62 | ||
63 | On the H8/300H, you can also use the eight predefined symbols | |
64 | @samp{er@var{n}} (@samp{er0} @dots{} @samp{er7}) to refer to the 32-bit | |
65 | general purpose registers. | |
66 | ||
67 | The two control registers are called @code{pc} (program counter; a | |
68 | 16-bit register, except on the H8/300H where it is 24 bits) and | |
69 | @code{ccr} (condition code register; an 8-bit register). @code{r7} is | |
70 | used as the stack pointer, and can also be called @code{sp}. | |
71 | ||
72 | @node H8/300-Addressing | |
73 | @subsection Addressing Modes | |
74 | ||
75 | @cindex addressing modes, H8/300 | |
76 | @cindex H8/300 addressing modes | |
77 | @value{AS} understands the following addressing modes for the H8/300: | |
78 | @table @code | |
79 | @item r@var{n} | |
80 | Register direct | |
81 | ||
82 | @item @@r@var{n} | |
83 | Register indirect | |
84 | ||
85 | @need 1200 | |
86 | @item @@(@var{d}, r@var{n}) | |
87 | @itemx @@(@var{d}:16, r@var{n}) | |
88 | @itemx @@(@var{d}:24, r@var{n}) | |
89 | Register indirect: 16-bit or 24-bit displacement @var{d} from register | |
90 | @var{n}. (24-bit displacements are only meaningful on the H8/300H.) | |
91 | ||
92 | @item @@r@var{n}+ | |
93 | Register indirect with post-increment | |
94 | ||
95 | @item @@-r@var{n} | |
96 | Register indirect with pre-decrement | |
97 | ||
98 | @item @code{@@}@var{aa} | |
99 | @itemx @code{@@}@var{aa}:8 | |
100 | @itemx @code{@@}@var{aa}:16 | |
101 | @itemx @code{@@}@var{aa}:24 | |
102 | Absolute address @code{aa}. (The address size @samp{:24} only makes | |
103 | sense on the H8/300H.) | |
104 | ||
105 | @item #@var{xx} | |
106 | @itemx #@var{xx}:8 | |
107 | @itemx #@var{xx}:16 | |
108 | @itemx #@var{xx}:32 | |
109 | Immediate data @var{xx}. You may specify the @samp{:8}, @samp{:16}, or | |
110 | @samp{:32} for clarity, if you wish; but @code{@value{AS}} neither | |
111 | requires this nor uses it---the data size required is taken from | |
112 | context. | |
113 | ||
114 | @item @code{@@}@code{@@}@var{aa} | |
115 | @itemx @code{@@}@code{@@}@var{aa}:8 | |
116 | Memory indirect. You may specify the @samp{:8} for clarity, if you | |
117 | wish; but @code{@value{AS}} neither requires this nor uses it. | |
118 | @end table | |
119 | ||
120 | @node H8/300 Floating Point | |
121 | @section Floating Point | |
122 | ||
123 | @cindex floating point, H8/300 (@sc{ieee}) | |
124 | @cindex H8/300 floating point (@sc{ieee}) | |
125 | The H8/300 family has no hardware floating point, but the @code{.float} | |
126 | directive generates @sc{ieee} floating-point numbers for compatibility | |
127 | with other development tools. | |
128 | ||
129 | @page | |
130 | @node H8/300 Directives | |
131 | @section H8/300 Machine Directives | |
132 | ||
133 | @cindex H8/300 machine directives (none) | |
134 | @cindex machine directives, H8/300 (none) | |
135 | @cindex @code{word} directive, H8/300 | |
136 | @cindex @code{int} directive, H8/300 | |
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137 | @code{@value{AS}} has the following machine-dependent directives for |
138 | the H8/300: | |
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139 | |
140 | @table @code | |
141 | @cindex H8/300H, assembling for | |
142 | @item .h8300h | |
143 | Recognize and emit additional instructions for the H8/300H variant, and | |
144 | also make @code{.int} emit 32-bit numbers rather than the usual (16-bit) | |
145 | for the H8/300 family. | |
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146 | |
147 | @item .h8300s | |
148 | Recognize and emit additional instructions for the H8S variant, and | |
149 | also make @code{.int} emit 32-bit numbers rather than the usual (16-bit) | |
150 | for the H8/300 family. | |
151 | ||
152 | @item .h8300hn | |
153 | Recognize and emit additional instructions for the H8/300H variant in | |
154 | normal mode, and also make @code{.int} emit 32-bit numbers rather than | |
155 | the usual (16-bit) for the H8/300 family. | |
156 | ||
157 | @item .h8300sn | |
158 | Recognize and emit additional instructions for the H8S variant in | |
159 | normal mode, and also make @code{.int} emit 32-bit numbers rather than | |
160 | the usual (16-bit) for the H8/300 family. | |
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161 | @end table |
162 | ||
163 | On the H8/300 family (including the H8/300H) @samp{.word} directives | |
164 | generate 16-bit numbers. | |
165 | ||
166 | @node H8/300 Opcodes | |
167 | @section Opcodes | |
168 | ||
169 | @cindex H8/300 opcode summary | |
170 | @cindex opcode summary, H8/300 | |
171 | @cindex mnemonics, H8/300 | |
172 | @cindex instruction summary, H8/300 | |
173 | For detailed information on the H8/300 machine instruction set, see | |
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174 | @cite{H8/300 Series Programming Manual}. For information specific to |
175 | the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas). | |
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176 | |
177 | @code{@value{AS}} implements all the standard H8/300 opcodes. No additional | |
178 | pseudo-instructions are needed on this family. | |
179 | ||
180 | @ifset SMALL | |
181 | @c this table, due to the multi-col faking and hardcoded order, looks silly | |
182 | @c except in smallbook. See comments below "@set SMALL" near top of this file. | |
183 | ||
184 | The following table summarizes the H8/300 opcodes, and their arguments. | |
185 | Entries marked @samp{*} are opcodes used only on the H8/300H. | |
186 | ||
187 | @smallexample | |
188 | @c Using @group seems to use the normal baselineskip, not the smallexample | |
189 | @c baselineskip; looks approx doublespaced. | |
190 | @i{Legend:} | |
191 | Rs @r{source register} | |
192 | Rd @r{destination register} | |
193 | abs @r{absolute address} | |
194 | imm @r{immediate data} | |
195 | disp:N @r{N-bit displacement from a register} | |
196 | pcrel:N @r{N-bit displacement relative to program counter} | |
197 | ||
198 | add.b #imm,rd * andc #imm,ccr | |
199 | add.b rs,rd band #imm,rd | |
200 | add.w rs,rd band #imm,@@rd | |
201 | * add.w #imm,rd band #imm,@@abs:8 | |
202 | * add.l rs,rd bra pcrel:8 | |
203 | * add.l #imm,rd * bra pcrel:16 | |
204 | adds #imm,rd bt pcrel:8 | |
205 | addx #imm,rd * bt pcrel:16 | |
206 | addx rs,rd brn pcrel:8 | |
207 | and.b #imm,rd * brn pcrel:16 | |
208 | and.b rs,rd bf pcrel:8 | |
209 | * and.w rs,rd * bf pcrel:16 | |
210 | * and.w #imm,rd bhi pcrel:8 | |
211 | * and.l #imm,rd * bhi pcrel:16 | |
212 | * and.l rs,rd bls pcrel:8 | |
213 | @page | |
214 | * bls pcrel:16 bld #imm,rd | |
215 | bcc pcrel:8 bld #imm,@@rd | |
216 | * bcc pcrel:16 bld #imm,@@abs:8 | |
217 | bhs pcrel:8 bnot #imm,rd | |
218 | * bhs pcrel:16 bnot #imm,@@rd | |
219 | bcs pcrel:8 bnot #imm,@@abs:8 | |
220 | * bcs pcrel:16 bnot rs,rd | |
221 | blo pcrel:8 bnot rs,@@rd | |
222 | * blo pcrel:16 bnot rs,@@abs:8 | |
223 | bne pcrel:8 bor #imm,rd | |
224 | * bne pcrel:16 bor #imm,@@rd | |
225 | beq pcrel:8 bor #imm,@@abs:8 | |
226 | * beq pcrel:16 bset #imm,rd | |
227 | bvc pcrel:8 bset #imm,@@rd | |
228 | * bvc pcrel:16 bset #imm,@@abs:8 | |
229 | bvs pcrel:8 bset rs,rd | |
230 | * bvs pcrel:16 bset rs,@@rd | |
231 | bpl pcrel:8 bset rs,@@abs:8 | |
232 | * bpl pcrel:16 bsr pcrel:8 | |
233 | bmi pcrel:8 bsr pcrel:16 | |
234 | * bmi pcrel:16 bst #imm,rd | |
235 | bge pcrel:8 bst #imm,@@rd | |
236 | * bge pcrel:16 bst #imm,@@abs:8 | |
237 | blt pcrel:8 btst #imm,rd | |
238 | * blt pcrel:16 btst #imm,@@rd | |
239 | bgt pcrel:8 btst #imm,@@abs:8 | |
240 | * bgt pcrel:16 btst rs,rd | |
241 | ble pcrel:8 btst rs,@@rd | |
242 | * ble pcrel:16 btst rs,@@abs:8 | |
243 | bclr #imm,rd bxor #imm,rd | |
244 | bclr #imm,@@rd bxor #imm,@@rd | |
245 | bclr #imm,@@abs:8 bxor #imm,@@abs:8 | |
246 | bclr rs,rd cmp.b #imm,rd | |
247 | bclr rs,@@rd cmp.b rs,rd | |
248 | bclr rs,@@abs:8 cmp.w rs,rd | |
249 | biand #imm,rd cmp.w rs,rd | |
250 | biand #imm,@@rd * cmp.w #imm,rd | |
251 | biand #imm,@@abs:8 * cmp.l #imm,rd | |
252 | bild #imm,rd * cmp.l rs,rd | |
253 | bild #imm,@@rd daa rs | |
254 | bild #imm,@@abs:8 das rs | |
255 | bior #imm,rd dec.b rs | |
256 | bior #imm,@@rd * dec.w #imm,rd | |
257 | bior #imm,@@abs:8 * dec.l #imm,rd | |
258 | bist #imm,rd divxu.b rs,rd | |
259 | bist #imm,@@rd * divxu.w rs,rd | |
260 | bist #imm,@@abs:8 * divxs.b rs,rd | |
261 | bixor #imm,rd * divxs.w rs,rd | |
262 | bixor #imm,@@rd eepmov | |
263 | bixor #imm,@@abs:8 * eepmovw | |
264 | @page | |
265 | * exts.w rd mov.w rs,@@abs:16 | |
266 | * exts.l rd * mov.l #imm,rd | |
267 | * extu.w rd * mov.l rs,rd | |
268 | * extu.l rd * mov.l @@rs,rd | |
269 | inc rs * mov.l @@(disp:16,rs),rd | |
270 | * inc.w #imm,rd * mov.l @@(disp:24,rs),rd | |
271 | * inc.l #imm,rd * mov.l @@rs+,rd | |
272 | jmp @@rs * mov.l @@abs:16,rd | |
273 | jmp abs * mov.l @@abs:24,rd | |
274 | jmp @@@@abs:8 * mov.l rs,@@rd | |
275 | jsr @@rs * mov.l rs,@@(disp:16,rd) | |
276 | jsr abs * mov.l rs,@@(disp:24,rd) | |
277 | jsr @@@@abs:8 * mov.l rs,@@-rd | |
278 | ldc #imm,ccr * mov.l rs,@@abs:16 | |
279 | ldc rs,ccr * mov.l rs,@@abs:24 | |
280 | * ldc @@abs:16,ccr movfpe @@abs:16,rd | |
281 | * ldc @@abs:24,ccr movtpe rs,@@abs:16 | |
282 | * ldc @@(disp:16,rs),ccr mulxu.b rs,rd | |
283 | * ldc @@(disp:24,rs),ccr * mulxu.w rs,rd | |
284 | * ldc @@rs+,ccr * mulxs.b rs,rd | |
285 | * ldc @@rs,ccr * mulxs.w rs,rd | |
286 | * mov.b @@(disp:24,rs),rd neg.b rs | |
287 | * mov.b rs,@@(disp:24,rd) * neg.w rs | |
288 | mov.b @@abs:16,rd * neg.l rs | |
289 | mov.b rs,rd nop | |
290 | mov.b @@abs:8,rd not.b rs | |
291 | mov.b rs,@@abs:8 * not.w rs | |
292 | mov.b rs,rd * not.l rs | |
293 | mov.b #imm,rd or.b #imm,rd | |
294 | mov.b @@rs,rd or.b rs,rd | |
295 | mov.b @@(disp:16,rs),rd * or.w #imm,rd | |
296 | mov.b @@rs+,rd * or.w rs,rd | |
297 | mov.b @@abs:8,rd * or.l #imm,rd | |
298 | mov.b rs,@@rd * or.l rs,rd | |
299 | mov.b rs,@@(disp:16,rd) orc #imm,ccr | |
300 | mov.b rs,@@-rd pop.w rs | |
301 | mov.b rs,@@abs:8 * pop.l rs | |
302 | mov.w rs,@@rd push.w rs | |
303 | * mov.w @@(disp:24,rs),rd * push.l rs | |
304 | * mov.w rs,@@(disp:24,rd) rotl.b rs | |
305 | * mov.w @@abs:24,rd * rotl.w rs | |
306 | * mov.w rs,@@abs:24 * rotl.l rs | |
307 | mov.w rs,rd rotr.b rs | |
308 | mov.w #imm,rd * rotr.w rs | |
309 | mov.w @@rs,rd * rotr.l rs | |
310 | mov.w @@(disp:16,rs),rd rotxl.b rs | |
311 | mov.w @@rs+,rd * rotxl.w rs | |
312 | mov.w @@abs:16,rd * rotxl.l rs | |
313 | mov.w rs,@@(disp:16,rd) rotxr.b rs | |
314 | mov.w rs,@@-rd * rotxr.w rs | |
315 | @page | |
316 | * rotxr.l rs * stc ccr,@@(disp:24,rd) | |
317 | bpt * stc ccr,@@-rd | |
318 | rte * stc ccr,@@abs:16 | |
319 | rts * stc ccr,@@abs:24 | |
320 | shal.b rs sub.b rs,rd | |
321 | * shal.w rs sub.w rs,rd | |
322 | * shal.l rs * sub.w #imm,rd | |
323 | shar.b rs * sub.l rs,rd | |
324 | * shar.w rs * sub.l #imm,rd | |
325 | * shar.l rs subs #imm,rd | |
326 | shll.b rs subx #imm,rd | |
327 | * shll.w rs subx rs,rd | |
328 | * shll.l rs * trapa #imm | |
329 | shlr.b rs xor #imm,rd | |
330 | * shlr.w rs xor rs,rd | |
331 | * shlr.l rs * xor.w #imm,rd | |
332 | sleep * xor.w rs,rd | |
333 | stc ccr,rd * xor.l #imm,rd | |
334 | * stc ccr,@@rs * xor.l rs,rd | |
335 | * stc ccr,@@(disp:16,rd) xorc #imm,ccr | |
336 | @end smallexample | |
337 | @end ifset | |
338 | ||
339 | @cindex size suffixes, H8/300 | |
340 | @cindex H8/300 size suffixes | |
341 | Four H8/300 instructions (@code{add}, @code{cmp}, @code{mov}, | |
342 | @code{sub}) are defined with variants using the suffixes @samp{.b}, | |
343 | @samp{.w}, and @samp{.l} to specify the size of a memory operand. | |
344 | @code{@value{AS}} supports these suffixes, but does not require them; | |
345 | since one of the operands is always a register, @code{@value{AS}} can | |
346 | deduce the correct size. | |
347 | ||
348 | For example, since @code{r0} refers to a 16-bit register, | |
349 | @example | |
350 | mov r0,@@foo | |
351 | @exdent is equivalent to | |
352 | mov.w r0,@@foo | |
353 | @end example | |
354 | ||
355 | If you use the size suffixes, @code{@value{AS}} issues a warning when | |
356 | the suffix and the register size do not match. |