gas/doc/c-h8300.texi

   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
  26 Renesas (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{$} can be used instead of a newline to separate statements.
  47 Therefore @emph{you may not use @samp{$} 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
  54 You 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
  56 general-purpose registers.  @var{n} is a digit from @samp{0} to
  57 @samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
  58 register names.
  59
  60 You can also use the eight predefined symbols @samp{r@var{n}} to refer
  61 to the H8/300 registers as 16-bit registers (you must use this form for
  62 addressing).
  63
  64 On 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
  66 general purpose registers.
  67
  68 The two control registers are called @code{pc} (program counter; a
  69 16-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
  71 used 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}
  81 Register direct
  82
  83 @item @@r@var{n}
  84 Register 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})
  90 Register 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}+
  94 Register indirect with post-increment
  95
  96 @item @@-r@var{n}
  97 Register 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
 103 Absolute address @code{aa}.  (The address size @samp{:24} only makes
 104 sense on the H8/300H.)
 105
 106 @item #@var{xx}
 107 @itemx #@var{xx}:8
 108 @itemx #@var{xx}:16
 109 @itemx #@var{xx}:32
 110 Immediate 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
 112 requires this nor uses it---the data size required is taken from
 113 context.
 114
 115 @item @code{@@}@code{@@}@var{aa}
 116 @itemx @code{@@}@code{@@}@var{aa}:8
 117 Memory indirect.  You may specify the @samp{:8} for clarity, if you
 118 wish; 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})
 126 The H8/300 family has no hardware floating point, but the @code{.float}
 127 directive generates @sc{ieee} floating-point numbers for compatibility
 128 with 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
 139 the H8/300:
 140
 141 @table @code
 142 @cindex H8/300H, assembling for
 143 @item .h8300h
 144 Recognize and emit additional instructions for the H8/300H variant, and
 145 also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
 146 for the H8/300 family.
 147
 148 @item .h8300s
 149 Recognize and emit additional instructions for the H8S variant, and
 150 also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
 151 for the H8/300 family.
 152
 153 @item .h8300hn
 154 Recognize and emit additional instructions for the H8/300H variant in
 155 normal mode, and also make @code{.int} emit 32-bit numbers rather than
 156 the usual (16-bit) for the H8/300 family.
 157
 158 @item .h8300sn
 159 Recognize and emit additional instructions for the H8S variant in
 160 normal mode, and also make @code{.int} emit 32-bit numbers rather than
 161 the usual (16-bit) for the H8/300 family.
 162 @end table
 163
 164 On the H8/300 family (including the H8/300H) @samp{.word} directives
 165 generate 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
 174 For detailed information on the H8/300 machine instruction set, see
 175 @cite{H8/300 Series Programming Manual}.  For information specific to
 176 the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
 177
 178 @code{@value{AS}} implements all the standard H8/300 opcodes.  No additional
 179 pseudo-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
 185 The following table summarizes the H8/300 opcodes, and their arguments.
 186 Entries 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
 342 Four 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;
 346 since one of the operands is always a register, @code{@value{AS}} can
 347 deduce the correct size.
 348
 349 For example, since @code{r0} refers to a 16-bit register,
 350 @example
 351 mov    r0,@@foo
 352 @exdent is equivalent to
 353 mov.w  r0,@@foo
 354 @end example
 355
 356 If you use the size suffixes, @code{@value{AS}} issues a warning when
 357 the suffix and the register size do not match.