1@c Copyright (C) 1991, 1992, 1993, 1994, 1995, 2003 Free Software Foundation, Inc.
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)
24@code{@value{AS}} has no additional command-line options for the
25Renesas (formerly Hitachi) H8/300 family.
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{$} can be used instead of a newline to separate statements.
46Therefore @emph{you may not use @samp{$} 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
53You 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
55general-purpose registers.  @var{n} is a digit from @samp{0} to
56@samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
57register names.
58
59You can also use the eight predefined symbols @samp{r@var{n}} to refer
60to the H8/300 registers as 16-bit registers (you must use this form for
61addressing).
62
63On 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
65general purpose registers.
66
67The two control registers are called @code{pc} (program counter; a
6816-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
70used 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}
80Register direct
81
82@item @@r@var{n}
83Register 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})
89Register 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}+
93Register indirect with post-increment
94
95@item @@-r@var{n}
96Register 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
102Absolute address @code{aa}.  (The address size @samp{:24} only makes
103sense on the H8/300H.)
104
105@item #@var{xx}
106@itemx #@var{xx}:8
107@itemx #@var{xx}:16
108@itemx #@var{xx}:32
109Immediate 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
111requires this nor uses it---the data size required is taken from
112context.
113
114@item @code{@@}@code{@@}@var{aa}
115@itemx @code{@@}@code{@@}@var{aa}:8
116Memory indirect.  You may specify the @samp{:8} for clarity, if you
117wish; 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})
125The H8/300 family has no hardware floating point, but the @code{.float}
126directive generates @sc{ieee} floating-point numbers for compatibility
127with 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
137@code{@value{AS}} has the following machine-dependent directives for
138the H8/300:
139
140@table @code
141@cindex H8/300H, assembling for
142@item .h8300h
143Recognize and emit additional instructions for the H8/300H variant, and
144also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
145for the H8/300 family.
146
147@item .h8300s
148Recognize and emit additional instructions for the H8S variant, and
149also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
150for the H8/300 family.
151
152@item .h8300hn
153Recognize and emit additional instructions for the H8/300H variant in
154normal mode, and also make @code{.int} emit 32-bit numbers rather than 
155the usual (16-bit) for the H8/300 family.
156
157@item .h8300sn
158Recognize and emit additional instructions for the H8S variant in
159normal mode, and also make @code{.int} emit 32-bit numbers rather than 
160the usual (16-bit) for the H8/300 family.
161@end table
162
163On the H8/300 family (including the H8/300H) @samp{.word} directives
164generate 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
173For detailed information on the H8/300 machine instruction set, see
174@cite{H8/300 Series Programming Manual}.  For information specific to
175the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
176
177@code{@value{AS}} implements all the standard H8/300 opcodes.  No additional
178pseudo-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
184The following table summarizes the H8/300 opcodes, and their arguments.
185Entries 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
341Four 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;
345since one of the operands is always a register, @code{@value{AS}} can
346deduce the correct size.
347
348For example, since @code{r0} refers to a 16-bit register,
349@example
350mov    r0,@@foo
351@exdent is equivalent to
352mov.w  r0,@@foo
353@end example
354
355If you use the size suffixes, @code{@value{AS}} issues a warning when
356the suffix and the register size do not match.
357