1 @c Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
2 @c This is part of the GAS manual.
3 @c For copying conditions, see the file as.texinfo.
6 @chapter H8/500 Dependent Features
10 * H8/500 Options:: Options
11 * H8/500 Syntax:: Syntax
12 * H8/500 Floating Point:: Floating Point
13 * H8/500 Directives:: H8/500 Machine Directives
14 * H8/500 Opcodes:: Opcodes
20 @cindex H8/500 options (none)
21 @cindex options, H8/500 (none)
22 @code{@value{AS}} has no additional command-line options for the Hitachi
29 * H8/500-Chars:: Special Characters
30 * H8/500-Regs:: Register Names
31 * H8/500-Addressing:: Addressing Modes
35 @subsection Special Characters
37 @cindex line comment character, H8/500
38 @cindex H8/500 line comment character
39 @samp{!} is the line comment character.
41 @cindex line separator, H8/500
42 @cindex statement separator, H8/500
43 @cindex H8/500 line separator
44 @samp{;} can be used instead of a newline to separate statements.
46 @cindex symbol names, @samp{$} in
47 @cindex @code{$} in symbol names
48 Since @samp{$} has no special meaning, you may use it in symbol names.
51 @subsection Register Names
53 @cindex H8/500 registers
54 @cindex registers, H8/500
55 You can use the predefined symbols @samp{r0}, @samp{r1}, @samp{r2},
56 @samp{r3}, @samp{r4}, @samp{r5}, @samp{r6}, and @samp{r7} to refer to
59 The H8/500 also has these control registers:
81 condition code register
84 All registers are 16 bits long. To represent 32 bit numbers, use two
85 adjacent registers; for distant memory addresses, use one of the segment
86 pointers (@code{cp} for the program counter; @code{dp} for
87 @code{r0}--@code{r3}; @code{ep} for @code{r4} and @code{r5}; and
88 @code{tp} for @code{r6} and @code{r7}.
90 @node H8/500-Addressing
91 @subsection Addressing Modes
93 @cindex addressing modes, H8/500
94 @cindex H8/500 addressing modes
95 @value{AS} understands the following addressing modes for the H8/500:
103 @item @@(d:8, R@var{n})
104 Register indirect with 8 bit signed displacement
106 @item @@(d:16, R@var{n})
107 Register indirect with 16 bit signed displacement
110 Register indirect with pre-decrement
113 Register indirect with post-increment
116 8 bit absolute address
119 16 bit absolute address
128 @node H8/500 Floating Point
129 @section Floating Point
131 @cindex floating point, H8/500 (@sc{ieee})
132 @cindex H8/500 floating point (@sc{ieee})
133 The H8/500 family has no hardware floating point, but the @code{.float}
134 directive generates @sc{ieee} floating-point numbers for compatibility
135 with other development tools.
137 @node H8/500 Directives
138 @section H8/500 Machine Directives
140 @cindex H8/500 machine directives (none)
141 @cindex machine directives, H8/500 (none)
142 @cindex @code{word} directive, H8/500
143 @cindex @code{int} directive, H8/500
144 @code{@value{AS}} has no machine-dependent directives for the H8/500.
145 However, on this platform the @samp{.int} and @samp{.word} directives
146 generate 16-bit numbers.
151 @cindex H8/500 opcode summary
152 @cindex opcode summary, H8/500
153 @cindex mnemonics, H8/500
154 @cindex instruction summary, H8/500
155 For detailed information on the H8/500 machine instruction set, see
156 @cite{H8/500 Series Programming Manual} (Hitachi M21T001).
158 @code{@value{AS}} implements all the standard H8/500 opcodes. No additional
159 pseudo-instructions are needed on this family.
162 @c this table, due to the multi-col faking and hardcoded order, looks silly
163 @c except in smallbook. See comments below "@set SMALL" near top of this file.
165 The following table summarizes H8/500 opcodes and their operands:
167 @c Use @group if it ever works, instead of @page
171 abs8 @r{8-bit absolute address}
172 abs16 @r{16-bit absolute address}
173 abs24 @r{24-bit absolute address}
174 crb @r{@code{ccr}, @code{br}, @code{ep}, @code{dp}, @code{tp}, @code{dp}}
175 disp8 @r{8-bit displacement}
176 ea @r{@code{rn}, @code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},}
177 @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16},}
178 @r{@code{#xx:8}, @code{#xx:16}}
179 ea_mem @r{@code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},}
180 @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16}}
181 ea_noimm @r{@code{rn}, @code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},}
182 @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16}}
184 imm4 @r{4-bit immediate data}
185 imm8 @r{8-bit immediate data}
186 imm16 @r{16-bit immediate data}
187 pcrel8 @r{8-bit offset from program counter}
188 pcrel16 @r{16-bit offset from program counter}
189 qim @r{@code{-2}, @code{-1}, @code{1}, @code{2}}
191 rs @r{a register distinct from rd}
192 rlist @r{comma-separated list of registers in parentheses;}
193 @r{register ranges @code{rd-rs} are allowed}
194 sp @r{stack pointer (@code{r7})}
195 sr @r{status register}
196 sz @r{size; @samp{.b} or @samp{.w}. If omitted, default @samp{.w}}
198 ldc[.b] ea,crb bcc[.w] pcrel16
199 ldc[.w] ea,sr bcc[.b] pcrel8
200 add[:q] sz qim,ea_noimm bhs[.w] pcrel16
201 add[:g] sz ea,rd bhs[.b] pcrel8
202 adds sz ea,rd bcs[.w] pcrel16
203 addx sz ea,rd bcs[.b] pcrel8
204 and sz ea,rd blo[.w] pcrel16
205 andc[.b] imm8,crb blo[.b] pcrel8
206 andc[.w] imm16,sr bne[.w] pcrel16
208 bra[.w] pcrel16 beq[.w] pcrel16
209 bra[.b] pcrel8 beq[.b] pcrel8
210 bt[.w] pcrel16 bvc[.w] pcrel16
211 bt[.b] pcrel8 bvc[.b] pcrel8
212 brn[.w] pcrel16 bvs[.w] pcrel16
213 brn[.b] pcrel8 bvs[.b] pcrel8
214 bf[.w] pcrel16 bpl[.w] pcrel16
215 bf[.b] pcrel8 bpl[.b] pcrel8
216 bhi[.w] pcrel16 bmi[.w] pcrel16
217 bhi[.b] pcrel8 bmi[.b] pcrel8
218 bls[.w] pcrel16 bge[.w] pcrel16
219 bls[.b] pcrel8 bge[.b] pcrel8
221 blt[.w] pcrel16 mov[:g][.b] imm8,ea_mem
222 blt[.b] pcrel8 mov[:g][.w] imm16,ea_mem
223 bgt[.w] pcrel16 movfpe[.b] ea,rd
224 bgt[.b] pcrel8 movtpe[.b] rs,ea_noimm
225 ble[.w] pcrel16 mulxu sz ea,rd
226 ble[.b] pcrel8 neg sz ea
227 bclr sz imm4,ea_noimm nop
228 bclr sz rs,ea_noimm not sz ea
229 bnot sz imm4,ea_noimm or sz ea,rd
230 bnot sz rs,ea_noimm orc[.b] imm8,crb
231 bset sz imm4,ea_noimm orc[.w] imm16,sr
232 bset sz rs,ea_noimm pjmp abs24
233 bsr[.b] pcrel8 pjmp @@rd
234 bsr[.w] pcrel16 pjsr abs24
235 btst sz imm4,ea_noimm pjsr @@rd
236 btst sz rs,ea_noimm prtd imm8
238 cmp[:e][.b] imm8,rd prts
239 cmp[:i][.w] imm16,rd rotl sz ea
240 cmp[:g].b imm8,ea_noimm rotr sz ea
241 cmp[:g][.w] imm16,ea_noimm rotxl sz ea
242 Cmp[:g] sz ea,rd rotxr sz ea
244 divxu sz ea,rd rtd imm16
246 exts[.b] rd scb/f rs,pcrel8
247 extu[.b] rd scb/ne rs,pcrel8
248 jmp @@rd scb/eq rs,pcrel8
249 jmp @@(imm8,rd) shal sz ea
250 jmp @@(imm16,rd) shar sz ea
253 jsr @@(imm8,rd) sleep
254 jsr @@(imm16,rd) stc[.b] crb,ea_noimm
255 jsr abs16 stc[.w] sr,ea_noimm
256 ldm @@sp+,(rlist) stm (rlist),@@-sp
257 link fp,imm8 sub sz ea,rd
258 link fp,imm16 subs sz ea,rd
259 mov[:e][.b] imm8,rd subx sz ea,rd
260 mov[:i][.w] imm16,rd swap[.b] rd
261 mov[:l][.w] abs8,rd tas[.b] ea
262 mov[:l].b abs8,rd trapa imm4
263 mov[:s][.w] rs,abs8 trap/vs
264 mov[:s].b rs,abs8 tst sz ea
265 mov[:f][.w] @@(disp8,fp),rd unlk fp
266 mov[:f][.w] rs,@@(disp8,fp) xch[.w] rs,rd
267 mov[:f].b @@(disp8,fp),rd xor sz ea,rd
268 mov[:f].b rs,@@(disp8,fp) xorc.b imm8,crb
269 mov[:g] sz rs,ea_mem xorc.w imm16,sr