1 @c Copyright (C) 1991, 1992, 1993, 1994, 1995, 2003
2 @c Free Software Foundation, Inc.
3 @c This is part of the GAS manual.
4 @c For copying conditions, see the file as.texinfo.
9 @chapter H8/300 Dependent Features
11 @cindex H8/300 support
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
23 @cindex H8/300 options
24 @cindex options, H8/300
25 The Renesas H8/300 version of @code{@value{AS}} has one
26 machine-dependent option:
30 Support H'00 style hex constants in addition to 0x00 style.
37 * H8/300-Chars:: Special Characters
38 * H8/300-Regs:: Register Names
39 * H8/300-Addressing:: Addressing Modes
43 @subsection Special Characters
45 @cindex line comment character, H8/300
46 @cindex H8/300 line comment character
47 @samp{;} is the line comment character.
49 @cindex line separator, H8/300
50 @cindex statement separator, H8/300
51 @cindex H8/300 line separator
52 @samp{$} can be used instead of a newline to separate statements.
53 Therefore @emph{you may not use @samp{$} in symbol names} on the H8/300.
56 @subsection Register Names
58 @cindex H8/300 registers
59 @cindex register names, H8/300
60 You can use predefined symbols of the form @samp{r@var{n}h} and
61 @samp{r@var{n}l} to refer to the H8/300 registers as sixteen 8-bit
62 general-purpose registers. @var{n} is a digit from @samp{0} to
63 @samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
66 You can also use the eight predefined symbols @samp{r@var{n}} to refer
67 to the H8/300 registers as 16-bit registers (you must use this form for
70 On the H8/300H, you can also use the eight predefined symbols
71 @samp{er@var{n}} (@samp{er0} @dots{} @samp{er7}) to refer to the 32-bit
72 general purpose registers.
74 The two control registers are called @code{pc} (program counter; a
75 16-bit register, except on the H8/300H where it is 24 bits) and
76 @code{ccr} (condition code register; an 8-bit register). @code{r7} is
77 used as the stack pointer, and can also be called @code{sp}.
79 @node H8/300-Addressing
80 @subsection Addressing Modes
82 @cindex addressing modes, H8/300
83 @cindex H8/300 addressing modes
84 @value{AS} understands the following addressing modes for the H8/300:
93 @item @@(@var{d}, r@var{n})
94 @itemx @@(@var{d}:16, r@var{n})
95 @itemx @@(@var{d}:24, r@var{n})
96 Register indirect: 16-bit or 24-bit displacement @var{d} from register
97 @var{n}. (24-bit displacements are only meaningful on the H8/300H.)
100 Register indirect with post-increment
103 Register indirect with pre-decrement
105 @item @code{@@}@var{aa}
106 @itemx @code{@@}@var{aa}:8
107 @itemx @code{@@}@var{aa}:16
108 @itemx @code{@@}@var{aa}:24
109 Absolute address @code{aa}. (The address size @samp{:24} only makes
110 sense on the H8/300H.)
116 Immediate data @var{xx}. You may specify the @samp{:8}, @samp{:16}, or
117 @samp{:32} for clarity, if you wish; but @code{@value{AS}} neither
118 requires this nor uses it---the data size required is taken from
121 @item @code{@@}@code{@@}@var{aa}
122 @itemx @code{@@}@code{@@}@var{aa}:8
123 Memory indirect. You may specify the @samp{:8} for clarity, if you
124 wish; but @code{@value{AS}} neither requires this nor uses it.
127 @node H8/300 Floating Point
128 @section Floating Point
130 @cindex floating point, H8/300 (@sc{ieee})
131 @cindex H8/300 floating point (@sc{ieee})
132 The H8/300 family has no hardware floating point, but the @code{.float}
133 directive generates @sc{ieee} floating-point numbers for compatibility
134 with other development tools.
137 @node H8/300 Directives
138 @section H8/300 Machine Directives
140 @cindex H8/300 machine directives (none)
141 @cindex machine directives, H8/300 (none)
142 @cindex @code{word} directive, H8/300
143 @cindex @code{int} directive, H8/300
144 @code{@value{AS}} has the following machine-dependent directives for
148 @cindex H8/300H, assembling for
150 Recognize and emit additional instructions for the H8/300H variant, and
151 also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
152 for the H8/300 family.
155 Recognize and emit additional instructions for the H8S variant, and
156 also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
157 for the H8/300 family.
160 Recognize and emit additional instructions for the H8/300H variant in
161 normal mode, and also make @code{.int} emit 32-bit numbers rather than
162 the usual (16-bit) for the H8/300 family.
165 Recognize and emit additional instructions for the H8S variant in
166 normal mode, and also make @code{.int} emit 32-bit numbers rather than
167 the usual (16-bit) for the H8/300 family.
170 On the H8/300 family (including the H8/300H) @samp{.word} directives
171 generate 16-bit numbers.
176 @cindex H8/300 opcode summary
177 @cindex opcode summary, H8/300
178 @cindex mnemonics, H8/300
179 @cindex instruction summary, H8/300
180 For detailed information on the H8/300 machine instruction set, see
181 @cite{H8/300 Series Programming Manual}. For information specific to
182 the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
184 @code{@value{AS}} implements all the standard H8/300 opcodes. No additional
185 pseudo-instructions are needed on this family.
188 @c this table, due to the multi-col faking and hardcoded order, looks silly
189 @c except in smallbook. See comments below "@set SMALL" near top of this file.
191 The following table summarizes the H8/300 opcodes, and their arguments.
192 Entries marked @samp{*} are opcodes used only on the H8/300H.
195 @c Using @group seems to use the normal baselineskip, not the smallexample
196 @c baselineskip; looks approx doublespaced.
198 Rs @r{source register}
199 Rd @r{destination register}
200 abs @r{absolute address}
201 imm @r{immediate data}
202 disp:N @r{N-bit displacement from a register}
203 pcrel:N @r{N-bit displacement relative to program counter}
205 add.b #imm,rd * andc #imm,ccr
206 add.b rs,rd band #imm,rd
207 add.w rs,rd band #imm,@@rd
208 * add.w #imm,rd band #imm,@@abs:8
209 * add.l rs,rd bra pcrel:8
210 * add.l #imm,rd * bra pcrel:16
211 adds #imm,rd bt pcrel:8
212 addx #imm,rd * bt pcrel:16
213 addx rs,rd brn pcrel:8
214 and.b #imm,rd * brn pcrel:16
215 and.b rs,rd bf pcrel:8
216 * and.w rs,rd * bf pcrel:16
217 * and.w #imm,rd bhi pcrel:8
218 * and.l #imm,rd * bhi pcrel:16
219 * and.l rs,rd bls pcrel:8
221 * bls pcrel:16 bld #imm,rd
222 bcc pcrel:8 bld #imm,@@rd
223 * bcc pcrel:16 bld #imm,@@abs:8
224 bhs pcrel:8 bnot #imm,rd
225 * bhs pcrel:16 bnot #imm,@@rd
226 bcs pcrel:8 bnot #imm,@@abs:8
227 * bcs pcrel:16 bnot rs,rd
228 blo pcrel:8 bnot rs,@@rd
229 * blo pcrel:16 bnot rs,@@abs:8
230 bne pcrel:8 bor #imm,rd
231 * bne pcrel:16 bor #imm,@@rd
232 beq pcrel:8 bor #imm,@@abs:8
233 * beq pcrel:16 bset #imm,rd
234 bvc pcrel:8 bset #imm,@@rd
235 * bvc pcrel:16 bset #imm,@@abs:8
236 bvs pcrel:8 bset rs,rd
237 * bvs pcrel:16 bset rs,@@rd
238 bpl pcrel:8 bset rs,@@abs:8
239 * bpl pcrel:16 bsr pcrel:8
240 bmi pcrel:8 bsr pcrel:16
241 * bmi pcrel:16 bst #imm,rd
242 bge pcrel:8 bst #imm,@@rd
243 * bge pcrel:16 bst #imm,@@abs:8
244 blt pcrel:8 btst #imm,rd
245 * blt pcrel:16 btst #imm,@@rd
246 bgt pcrel:8 btst #imm,@@abs:8
247 * bgt pcrel:16 btst rs,rd
248 ble pcrel:8 btst rs,@@rd
249 * ble pcrel:16 btst rs,@@abs:8
250 bclr #imm,rd bxor #imm,rd
251 bclr #imm,@@rd bxor #imm,@@rd
252 bclr #imm,@@abs:8 bxor #imm,@@abs:8
253 bclr rs,rd cmp.b #imm,rd
254 bclr rs,@@rd cmp.b rs,rd
255 bclr rs,@@abs:8 cmp.w rs,rd
256 biand #imm,rd cmp.w rs,rd
257 biand #imm,@@rd * cmp.w #imm,rd
258 biand #imm,@@abs:8 * cmp.l #imm,rd
259 bild #imm,rd * cmp.l rs,rd
260 bild #imm,@@rd daa rs
261 bild #imm,@@abs:8 das rs
262 bior #imm,rd dec.b rs
263 bior #imm,@@rd * dec.w #imm,rd
264 bior #imm,@@abs:8 * dec.l #imm,rd
265 bist #imm,rd divxu.b rs,rd
266 bist #imm,@@rd * divxu.w rs,rd
267 bist #imm,@@abs:8 * divxs.b rs,rd
268 bixor #imm,rd * divxs.w rs,rd
269 bixor #imm,@@rd eepmov
270 bixor #imm,@@abs:8 * eepmovw
272 * exts.w rd mov.w rs,@@abs:16
273 * exts.l rd * mov.l #imm,rd
274 * extu.w rd * mov.l rs,rd
275 * extu.l rd * mov.l @@rs,rd
276 inc rs * mov.l @@(disp:16,rs),rd
277 * inc.w #imm,rd * mov.l @@(disp:24,rs),rd
278 * inc.l #imm,rd * mov.l @@rs+,rd
279 jmp @@rs * mov.l @@abs:16,rd
280 jmp abs * mov.l @@abs:24,rd
281 jmp @@@@abs:8 * mov.l rs,@@rd
282 jsr @@rs * mov.l rs,@@(disp:16,rd)
283 jsr abs * mov.l rs,@@(disp:24,rd)
284 jsr @@@@abs:8 * mov.l rs,@@-rd
285 ldc #imm,ccr * mov.l rs,@@abs:16
286 ldc rs,ccr * mov.l rs,@@abs:24
287 * ldc @@abs:16,ccr movfpe @@abs:16,rd
288 * ldc @@abs:24,ccr movtpe rs,@@abs:16
289 * ldc @@(disp:16,rs),ccr mulxu.b rs,rd
290 * ldc @@(disp:24,rs),ccr * mulxu.w rs,rd
291 * ldc @@rs+,ccr * mulxs.b rs,rd
292 * ldc @@rs,ccr * mulxs.w rs,rd
293 * mov.b @@(disp:24,rs),rd neg.b rs
294 * mov.b rs,@@(disp:24,rd) * neg.w rs
295 mov.b @@abs:16,rd * neg.l rs
297 mov.b @@abs:8,rd not.b rs
298 mov.b rs,@@abs:8 * not.w rs
299 mov.b rs,rd * not.l rs
300 mov.b #imm,rd or.b #imm,rd
301 mov.b @@rs,rd or.b rs,rd
302 mov.b @@(disp:16,rs),rd * or.w #imm,rd
303 mov.b @@rs+,rd * or.w rs,rd
304 mov.b @@abs:8,rd * or.l #imm,rd
305 mov.b rs,@@rd * or.l rs,rd
306 mov.b rs,@@(disp:16,rd) orc #imm,ccr
307 mov.b rs,@@-rd pop.w rs
308 mov.b rs,@@abs:8 * pop.l rs
309 mov.w rs,@@rd push.w rs
310 * mov.w @@(disp:24,rs),rd * push.l rs
311 * mov.w rs,@@(disp:24,rd) rotl.b rs
312 * mov.w @@abs:24,rd * rotl.w rs
313 * mov.w rs,@@abs:24 * rotl.l rs
314 mov.w rs,rd rotr.b rs
315 mov.w #imm,rd * rotr.w rs
316 mov.w @@rs,rd * rotr.l rs
317 mov.w @@(disp:16,rs),rd rotxl.b rs
318 mov.w @@rs+,rd * rotxl.w rs
319 mov.w @@abs:16,rd * rotxl.l rs
320 mov.w rs,@@(disp:16,rd) rotxr.b rs
321 mov.w rs,@@-rd * rotxr.w rs
323 * rotxr.l rs * stc ccr,@@(disp:24,rd)
325 rte * stc ccr,@@abs:16
326 rts * stc ccr,@@abs:24
327 shal.b rs sub.b rs,rd
328 * shal.w rs sub.w rs,rd
329 * shal.l rs * sub.w #imm,rd
330 shar.b rs * sub.l rs,rd
331 * shar.w rs * sub.l #imm,rd
332 * shar.l rs subs #imm,rd
333 shll.b rs subx #imm,rd
334 * shll.w rs subx rs,rd
335 * shll.l rs * trapa #imm
336 shlr.b rs xor #imm,rd
337 * shlr.w rs xor rs,rd
338 * shlr.l rs * xor.w #imm,rd
340 stc ccr,rd * xor.l #imm,rd
341 * stc ccr,@@rs * xor.l rs,rd
342 * stc ccr,@@(disp:16,rd) xorc #imm,ccr
346 @cindex size suffixes, H8/300
347 @cindex H8/300 size suffixes
348 Four H8/300 instructions (@code{add}, @code{cmp}, @code{mov},
349 @code{sub}) are defined with variants using the suffixes @samp{.b},
350 @samp{.w}, and @samp{.l} to specify the size of a memory operand.
351 @code{@value{AS}} supports these suffixes, but does not require them;
352 since one of the operands is always a register, @code{@value{AS}} can
353 deduce the correct size.
355 For example, since @code{r0} refers to a 16-bit register,
358 @exdent is equivalent to
362 If you use the size suffixes, @code{@value{AS}} issues a warning when
363 the suffix and the register size do not match.