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