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.
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)
25@code{@value{AS}} has no additional command-line options for the
26Renesas (formerly Hitachi) H8/300 family.
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{$} can be used instead of a newline to separate statements.
47Therefore @emph{you may not use @samp{$} 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
54You 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
56general-purpose registers.  @var{n} is a digit from @samp{0} to
57@samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
58register names.
59
60You can also use the eight predefined symbols @samp{r@var{n}} to refer
61to the H8/300 registers as 16-bit registers (you must use this form for
62addressing).
63
64On 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
66general purpose registers.
67
68The two control registers are called @code{pc} (program counter; a
6916-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
71used 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}
81Register direct
82
83@item @@r@var{n}
84Register 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})
90Register 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}+
94Register indirect with post-increment
95
96@item @@-r@var{n}
97Register 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
103Absolute address @code{aa}.  (The address size @samp{:24} only makes
104sense on the H8/300H.)
105
106@item #@var{xx}
107@itemx #@var{xx}:8
108@itemx #@var{xx}:16
109@itemx #@var{xx}:32
110Immediate 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
112requires this nor uses it---the data size required is taken from
113context.
114
115@item @code{@@}@code{@@}@var{aa}
116@itemx @code{@@}@code{@@}@var{aa}:8
117Memory indirect.  You may specify the @samp{:8} for clarity, if you
118wish; 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})
126The H8/300 family has no hardware floating point, but the @code{.float}
127directive generates @sc{ieee} floating-point numbers for compatibility
128with 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
138@code{@value{AS}} has the following machine-dependent directives for
139the H8/300:
140
141@table @code
142@cindex H8/300H, assembling for
143@item .h8300h
144Recognize and emit additional instructions for the H8/300H variant, and
145also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
146for the H8/300 family.
147
148@item .h8300s
149Recognize and emit additional instructions for the H8S variant, and
150also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
151for the H8/300 family.
152
153@item .h8300hn
154Recognize and emit additional instructions for the H8/300H variant in
155normal mode, and also make @code{.int} emit 32-bit numbers rather than
156the usual (16-bit) for the H8/300 family.
157
158@item .h8300sn
159Recognize and emit additional instructions for the H8S variant in
160normal mode, and also make @code{.int} emit 32-bit numbers rather than
161the usual (16-bit) for the H8/300 family.
162@end table
163
164On the H8/300 family (including the H8/300H) @samp{.word} directives
165generate 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
174For detailed information on the H8/300 machine instruction set, see
175@cite{H8/300 Series Programming Manual}.  For information specific to
176the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
177
178@code{@value{AS}} implements all the standard H8/300 opcodes.  No additional
179pseudo-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
185The following table summarizes the H8/300 opcodes, and their arguments.
186Entries 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
342Four 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;
346since one of the operands is always a register, @code{@value{AS}} can
347deduce the correct size.
348
349For example, since @code{r0} refers to a 16-bit register,
350@example
351mov    r0,@@foo
352@exdent is equivalent to
353mov.w  r0,@@foo
354@end example
355
356If you use the size suffixes, @code{@value{AS}} issues a warning when
357the suffix and the register size do not match.
358