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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. | |
4 | @page | |
5 | @node H8/500-Dependent | |
6 | @chapter H8/500 Dependent Features | |
7 | ||
8 | @cindex H8/500 support | |
9 | @menu | |
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 | |
15 | @end menu | |
16 | ||
17 | @node H8/500 Options | |
18 | @section Options | |
19 | ||
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 | |
23 | H8/500 family. | |
24 | ||
25 | @node H8/500 Syntax | |
26 | @section Syntax | |
27 | ||
28 | @menu | |
29 | * H8/500-Chars:: Special Characters | |
30 | * H8/500-Regs:: Register Names | |
31 | * H8/500-Addressing:: Addressing Modes | |
32 | @end menu | |
33 | ||
34 | @node H8/500-Chars | |
35 | @subsection Special Characters | |
36 | ||
37 | @cindex line comment character, H8/500 | |
38 | @cindex H8/500 line comment character | |
39 | @samp{!} is the line comment character. | |
40 | ||
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. | |
45 | ||
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. | |
49 | ||
50 | @node H8/500-Regs | |
51 | @subsection Register Names | |
52 | ||
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 | |
57 | the H8/500 registers. | |
58 | ||
59 | The H8/500 also has these control registers: | |
60 | ||
61 | @table @code | |
62 | @item cp | |
63 | code pointer | |
64 | ||
65 | @item dp | |
66 | data pointer | |
67 | ||
68 | @item bp | |
69 | base pointer | |
70 | ||
71 | @item tp | |
72 | stack top pointer | |
73 | ||
74 | @item ep | |
75 | extra pointer | |
76 | ||
77 | @item sr | |
78 | status register | |
79 | ||
80 | @item ccr | |
81 | condition code register | |
82 | @end table | |
83 | ||
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}. | |
89 | ||
90 | @node H8/500-Addressing | |
91 | @subsection Addressing Modes | |
92 | ||
93 | @cindex addressing modes, H8/500 | |
94 | @cindex H8/500 addressing modes | |
95 | @value{AS} understands the following addressing modes for the H8/500: | |
96 | @table @code | |
97 | @item R@var{n} | |
98 | Register direct | |
99 | ||
100 | @item @@R@var{n} | |
101 | Register indirect | |
102 | ||
103 | @item @@(d:8, R@var{n}) | |
104 | Register indirect with 8 bit signed displacement | |
105 | ||
106 | @item @@(d:16, R@var{n}) | |
107 | Register indirect with 16 bit signed displacement | |
108 | ||
109 | @item @@-R@var{n} | |
110 | Register indirect with pre-decrement | |
111 | ||
112 | @item @@R@var{n}+ | |
113 | Register indirect with post-increment | |
114 | ||
115 | @item @@@var{aa}:8 | |
116 | 8 bit absolute address | |
117 | ||
118 | @item @@@var{aa}:16 | |
119 | 16 bit absolute address | |
120 | ||
121 | @item #@var{xx}:8 | |
122 | 8 bit immediate | |
123 | ||
124 | @item #@var{xx}:16 | |
125 | 16 bit immediate | |
126 | @end table | |
127 | ||
128 | @node H8/500 Floating Point | |
129 | @section Floating Point | |
130 | ||
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. | |
136 | ||
137 | @node H8/500 Directives | |
138 | @section H8/500 Machine Directives | |
139 | ||
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. | |
147 | ||
148 | @node H8/500 Opcodes | |
149 | @section Opcodes | |
150 | ||
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). | |
157 | ||
158 | @code{@value{AS}} implements all the standard H8/500 opcodes. No additional | |
159 | pseudo-instructions are needed on this family. | |
160 | ||
161 | @ifset SMALL | |
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. | |
164 | ||
165 | The following table summarizes H8/500 opcodes and their operands: | |
166 | ||
167 | @c Use @group if it ever works, instead of @page | |
168 | @page | |
169 | @smallexample | |
170 | @i{Legend:} | |
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}} | |
183 | fp r6 | |
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}} | |
190 | rd @r{any register} | |
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}} | |
197 | ||
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 | |
207 | bpt bne[.b] pcrel8 | |
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 | |
220 | @page | |
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 | |
237 | clr sz ea prtd imm16 | |
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 | |
243 | dadd rs,rd rtd imm8 | |
244 | divxu sz ea,rd rtd imm16 | |
245 | dsub rs,rd rts | |
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 | |
251 | jmp abs16 shll sz ea | |
252 | jsr @@rd shlr 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 | |
270 | mov[:g] sz ea,rd | |
271 | @end smallexample | |
272 | @end ifset |