1@c Copyright (C) 1991-2014 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
23@cindex options, H8/300
24The Renesas H8/300 version of @code{@value{AS}} has one
25machine-dependent option:
26
27@c man begin OPTIONS
28@table @gcctabopt
29@item -h-tick-hex
30Support H'00 style hex constants in addition to 0x00 style.
31
32@end table
33@c man end
34
35@node H8/300 Syntax
36@section Syntax
37@menu
38* H8/300-Chars::                Special Characters
39* H8/300-Regs::                 Register Names
40* H8/300-Addressing::           Addressing Modes
41@end menu
42
43@node H8/300-Chars
44@subsection Special Characters
45
46@cindex line comment character, H8/300
47@cindex H8/300 line comment character
48@samp{;} is the line comment character.
49
50@cindex line separator, H8/300
51@cindex statement separator, H8/300
52@cindex H8/300 line separator
53@samp{$} can be used instead of a newline to separate statements.
54Therefore @emph{you may not use @samp{$} in symbol names} on the H8/300.
55
56@node H8/300-Regs
57@subsection Register Names
58
59@cindex H8/300 registers
60@cindex register names, H8/300
61You can use predefined symbols of the form @samp{r@var{n}h} and
62@samp{r@var{n}l} to refer to the H8/300 registers as sixteen 8-bit
63general-purpose registers.  @var{n} is a digit from @samp{0} to
64@samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
65register names.
66
67You can also use the eight predefined symbols @samp{r@var{n}} to refer
68to the H8/300 registers as 16-bit registers (you must use this form for
69addressing).
70
71On the H8/300H, you can also use the eight predefined symbols
72@samp{er@var{n}} (@samp{er0} @dots{} @samp{er7}) to refer to the 32-bit
73general purpose registers.
74
75The two control registers are called @code{pc} (program counter; a
7616-bit register, except on the H8/300H where it is 24 bits) and
77@code{ccr} (condition code register; an 8-bit register).  @code{r7} is
78used as the stack pointer, and can also be called @code{sp}.
79
80@node H8/300-Addressing
81@subsection Addressing Modes
82
83@cindex addressing modes, H8/300
84@cindex H8/300 addressing modes
85@value{AS} understands the following addressing modes for the H8/300:
86@table @code
87@item r@var{n}
88Register direct
89
90@item @@r@var{n}
91Register indirect
92
93@need 1200
94@item @@(@var{d}, r@var{n})
95@itemx @@(@var{d}:16, r@var{n})
96@itemx @@(@var{d}:24, r@var{n})
97Register indirect: 16-bit or 24-bit displacement @var{d} from register
98@var{n}.  (24-bit displacements are only meaningful on the H8/300H.)
99
100@item @@r@var{n}+
101Register indirect with post-increment
102
103@item @@-r@var{n}
104Register indirect with pre-decrement
105
106@item @code{@@}@var{aa}
107@itemx @code{@@}@var{aa}:8
108@itemx @code{@@}@var{aa}:16
109@itemx @code{@@}@var{aa}:24
110Absolute address @code{aa}.  (The address size @samp{:24} only makes
111sense on the H8/300H.)
112
113@item #@var{xx}
114@itemx #@var{xx}:8
115@itemx #@var{xx}:16
116@itemx #@var{xx}:32
117Immediate data @var{xx}.  You may specify the @samp{:8}, @samp{:16}, or
118@samp{:32} for clarity, if you wish; but @code{@value{AS}} neither
119requires this nor uses it---the data size required is taken from
120context.
121
122@item @code{@@}@code{@@}@var{aa}
123@itemx @code{@@}@code{@@}@var{aa}:8
124Memory indirect.  You may specify the @samp{:8} for clarity, if you
125wish; but @code{@value{AS}} neither requires this nor uses it.
126@end table
127
128@node H8/300 Floating Point
129@section Floating Point
130
131@cindex floating point, H8/300 (@sc{ieee})
132@cindex H8/300 floating point (@sc{ieee})
133The H8/300 family has no hardware floating point, but the @code{.float}
134directive generates @sc{ieee} floating-point numbers for compatibility
135with other development tools.
136
137@page
138@node H8/300 Directives
139@section H8/300 Machine Directives
140
141@cindex H8/300 machine directives (none)
142@cindex machine directives, H8/300 (none)
143@cindex @code{word} directive, H8/300
144@cindex @code{int} directive, H8/300
145@code{@value{AS}} has the following machine-dependent directives for
146the H8/300:
147
148@table @code
149@cindex H8/300H, assembling for
150@item .h8300h
151Recognize and emit additional instructions for the H8/300H variant, and
152also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
153for the H8/300 family.
154
155@item .h8300s
156Recognize and emit additional instructions for the H8S variant, and
157also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
158for the H8/300 family.
159
160@item .h8300hn
161Recognize and emit additional instructions for the H8/300H variant in
162normal mode, and also make @code{.int} emit 32-bit numbers rather than
163the usual (16-bit) for the H8/300 family.
164
165@item .h8300sn
166Recognize and emit additional instructions for the H8S variant in
167normal mode, and also make @code{.int} emit 32-bit numbers rather than
168the usual (16-bit) for the H8/300 family.
169@end table
170
171On the H8/300 family (including the H8/300H) @samp{.word} directives
172generate 16-bit numbers.
173
174@node H8/300 Opcodes
175@section Opcodes
176
177@cindex H8/300 opcode summary
178@cindex opcode summary, H8/300
179@cindex mnemonics, H8/300
180@cindex instruction summary, H8/300
181For detailed information on the H8/300 machine instruction set, see
182@cite{H8/300 Series Programming Manual}.  For information specific to
183the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
184
185@code{@value{AS}} implements all the standard H8/300 opcodes.  No additional
186pseudo-instructions are needed on this family.
187
188@ifset SMALL
189@c this table, due to the multi-col faking and hardcoded order, looks silly
190@c except in smallbook.  See comments below "@set SMALL" near top of this file.
191
192The following table summarizes the H8/300 opcodes, and their arguments.
193Entries marked @samp{*} are opcodes used only on the H8/300H.
194
195@smallexample
196@c Using @group seems to use the normal baselineskip, not the smallexample
197@c baselineskip; looks approx doublespaced.
198         @i{Legend:}
199            Rs   @r{source register}
200            Rd   @r{destination register}
201            abs  @r{absolute address}
202            imm  @r{immediate data}
203         disp:N  @r{N-bit displacement from a register}
204        pcrel:N  @r{N-bit displacement relative to program counter}
205
206   add.b #imm,rd              *  andc #imm,ccr
207   add.b rs,rd                   band #imm,rd
208   add.w rs,rd                   band #imm,@@rd
209*  add.w #imm,rd                 band #imm,@@abs:8
210*  add.l rs,rd                   bra  pcrel:8
211*  add.l #imm,rd              *  bra  pcrel:16
212   adds #imm,rd                  bt   pcrel:8
213   addx #imm,rd               *  bt   pcrel:16
214   addx rs,rd                    brn  pcrel:8
215   and.b #imm,rd              *  brn  pcrel:16
216   and.b rs,rd                   bf   pcrel:8
217*  and.w rs,rd                *  bf   pcrel:16
218*  and.w #imm,rd                 bhi  pcrel:8
219*  and.l #imm,rd              *  bhi  pcrel:16
220*  and.l rs,rd                   bls  pcrel:8
221@page
222*  bls  pcrel:16                 bld  #imm,rd
223   bcc  pcrel:8                  bld  #imm,@@rd
224*  bcc  pcrel:16                 bld  #imm,@@abs:8
225   bhs  pcrel:8                  bnot #imm,rd
226*  bhs  pcrel:16                 bnot #imm,@@rd
227   bcs  pcrel:8                  bnot #imm,@@abs:8
228*  bcs  pcrel:16                 bnot rs,rd
229   blo  pcrel:8                  bnot rs,@@rd
230*  blo  pcrel:16                 bnot rs,@@abs:8
231   bne  pcrel:8                  bor  #imm,rd
232*  bne  pcrel:16                 bor  #imm,@@rd
233   beq  pcrel:8                  bor  #imm,@@abs:8
234*  beq  pcrel:16                 bset #imm,rd
235   bvc  pcrel:8                  bset #imm,@@rd
236*  bvc  pcrel:16                 bset #imm,@@abs:8
237   bvs  pcrel:8                  bset rs,rd
238*  bvs  pcrel:16                 bset rs,@@rd
239   bpl  pcrel:8                  bset rs,@@abs:8
240*  bpl  pcrel:16                 bsr  pcrel:8
241   bmi  pcrel:8                  bsr  pcrel:16
242*  bmi  pcrel:16                 bst  #imm,rd
243   bge  pcrel:8                  bst  #imm,@@rd
244*  bge  pcrel:16                 bst  #imm,@@abs:8
245   blt  pcrel:8                  btst #imm,rd
246*  blt  pcrel:16                 btst #imm,@@rd
247   bgt  pcrel:8                  btst #imm,@@abs:8
248*  bgt  pcrel:16                 btst rs,rd
249   ble  pcrel:8                  btst rs,@@rd
250*  ble  pcrel:16                 btst rs,@@abs:8
251   bclr #imm,rd                  bxor #imm,rd
252   bclr #imm,@@rd                 bxor #imm,@@rd
253   bclr #imm,@@abs:8              bxor #imm,@@abs:8
254   bclr rs,rd                    cmp.b #imm,rd
255   bclr rs,@@rd                   cmp.b rs,rd
256   bclr rs,@@abs:8                cmp.w rs,rd
257   biand #imm,rd                 cmp.w rs,rd
258   biand #imm,@@rd             *  cmp.w #imm,rd
259   biand #imm,@@abs:8          *  cmp.l #imm,rd
260   bild #imm,rd               *  cmp.l rs,rd
261   bild #imm,@@rd                 daa  rs
262   bild #imm,@@abs:8              das  rs
263   bior #imm,rd                  dec.b rs
264   bior #imm,@@rd              *  dec.w #imm,rd
265   bior #imm,@@abs:8           *  dec.l #imm,rd
266   bist #imm,rd                  divxu.b rs,rd
267   bist #imm,@@rd              *  divxu.w rs,rd
268   bist #imm,@@abs:8           *  divxs.b rs,rd
269   bixor #imm,rd              *  divxs.w rs,rd
270   bixor #imm,@@rd                eepmov
271   bixor #imm,@@abs:8          *  eepmovw
272@page
273*  exts.w rd                     mov.w rs,@@abs:16
274*  exts.l rd                  *  mov.l #imm,rd
275*  extu.w rd                  *  mov.l rs,rd
276*  extu.l rd                  *  mov.l @@rs,rd
277   inc  rs                    *  mov.l @@(disp:16,rs),rd
278*  inc.w #imm,rd              *  mov.l @@(disp:24,rs),rd
279*  inc.l #imm,rd              *  mov.l @@rs+,rd
280   jmp  @@rs                   *  mov.l @@abs:16,rd
281   jmp  abs                   *  mov.l @@abs:24,rd
282   jmp  @@@@abs:8               *  mov.l rs,@@rd
283   jsr  @@rs                   *  mov.l rs,@@(disp:16,rd)
284   jsr  abs                   *  mov.l rs,@@(disp:24,rd)
285   jsr  @@@@abs:8               *  mov.l rs,@@-rd
286   ldc  #imm,ccr              *  mov.l rs,@@abs:16
287   ldc  rs,ccr                *  mov.l rs,@@abs:24
288*  ldc  @@abs:16,ccr              movfpe @@abs:16,rd
289*  ldc  @@abs:24,ccr              movtpe rs,@@abs:16
290*  ldc  @@(disp:16,rs),ccr        mulxu.b rs,rd
291*  ldc  @@(disp:24,rs),ccr     *  mulxu.w rs,rd
292*  ldc  @@rs+,ccr              *  mulxs.b rs,rd
293*  ldc  @@rs,ccr               *  mulxs.w rs,rd
294*  mov.b @@(disp:24,rs),rd        neg.b rs
295*  mov.b rs,@@(disp:24,rd)     *  neg.w rs
296   mov.b @@abs:16,rd           *  neg.l rs
297   mov.b rs,rd                   nop
298   mov.b @@abs:8,rd               not.b rs
299   mov.b rs,@@abs:8            *  not.w rs
300   mov.b rs,rd                *  not.l rs
301   mov.b #imm,rd                 or.b #imm,rd
302   mov.b @@rs,rd                  or.b rs,rd
303   mov.b @@(disp:16,rs),rd     *  or.w #imm,rd
304   mov.b @@rs+,rd              *  or.w rs,rd
305   mov.b @@abs:8,rd            *  or.l #imm,rd
306   mov.b rs,@@rd               *  or.l rs,rd
307   mov.b rs,@@(disp:16,rd)        orc  #imm,ccr
308   mov.b rs,@@-rd                 pop.w rs
309   mov.b rs,@@abs:8            *  pop.l rs
310   mov.w rs,@@rd                  push.w rs
311*  mov.w @@(disp:24,rs),rd     *  push.l rs
312*  mov.w rs,@@(disp:24,rd)        rotl.b rs
313*  mov.w @@abs:24,rd           *  rotl.w rs
314*  mov.w rs,@@abs:24           *  rotl.l rs
315   mov.w rs,rd                   rotr.b rs
316   mov.w #imm,rd              *  rotr.w rs
317   mov.w @@rs,rd               *  rotr.l rs
318   mov.w @@(disp:16,rs),rd        rotxl.b rs
319   mov.w @@rs+,rd              *  rotxl.w rs
320   mov.w @@abs:16,rd           *  rotxl.l rs
321   mov.w rs,@@(disp:16,rd)        rotxr.b rs
322   mov.w rs,@@-rd              *  rotxr.w rs
323@page
324*  rotxr.l rs                 *  stc  ccr,@@(disp:24,rd)
325   bpt                        *  stc  ccr,@@-rd
326   rte                        *  stc  ccr,@@abs:16
327   rts                        *  stc  ccr,@@abs:24
328   shal.b rs                     sub.b rs,rd
329*  shal.w rs                     sub.w rs,rd
330*  shal.l rs                  *  sub.w #imm,rd
331   shar.b rs                  *  sub.l rs,rd
332*  shar.w rs                  *  sub.l #imm,rd
333*  shar.l rs                     subs #imm,rd
334   shll.b rs                     subx #imm,rd
335*  shll.w rs                     subx rs,rd
336*  shll.l rs                  *  trapa #imm
337   shlr.b rs                     xor  #imm,rd
338*  shlr.w rs                     xor  rs,rd
339*  shlr.l rs                  *  xor.w #imm,rd
340   sleep                      *  xor.w rs,rd
341   stc  ccr,rd                *  xor.l #imm,rd
342*  stc  ccr,@@rs               *  xor.l rs,rd
343*  stc  ccr,@@(disp:16,rd)        xorc #imm,ccr
344@end smallexample
345@end ifset
346
347@cindex size suffixes, H8/300
348@cindex H8/300 size suffixes
349Four H8/300 instructions (@code{add}, @code{cmp}, @code{mov},
350@code{sub}) are defined with variants using the suffixes @samp{.b},
351@samp{.w}, and @samp{.l} to specify the size of a memory operand.
352@code{@value{AS}} supports these suffixes, but does not require them;
353since one of the operands is always a register, @code{@value{AS}} can
354deduce the correct size.
355
356For example, since @code{r0} refers to a 16-bit register,
357@example
358mov    r0,@@foo
359@exdent is equivalent to
360mov.w  r0,@@foo
361@end example
362
363If you use the size suffixes, @code{@value{AS}} issues a warning when
364the suffix and the register size do not match.
365