gas/doc/c-h8300.texi

   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 @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 Hitachi
  25 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{$} can be used instead of a newline to separate statements.
  46 Therefore @emph{you may not use @samp{$} 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
  53 You 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
  55 general-purpose registers.  @var{n} is a digit from @samp{0} to
  56 @samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
  57 register names.
  58
  59 You can also use the eight predefined symbols @samp{r@var{n}} to refer
  60 to the H8/300 registers as 16-bit registers (you must use this form for
  61 addressing).
  62
  63 On 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
  65 general purpose registers.
  66
  67 The two control registers are called @code{pc} (program counter; a
  68 16-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
  70 used 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}
  80 Register direct
  81
  82 @item @@r@var{n}
  83 Register 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})
  89 Register 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}+
  93 Register indirect with post-increment
  94
  95 @item @@-r@var{n}
  96 Register 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
 102 Absolute address @code{aa}.  (The address size @samp{:24} only makes
 103 sense on the H8/300H.)
 104
 105 @item #@var{xx}
 106 @itemx #@var{xx}:8
 107 @itemx #@var{xx}:16
 108 @itemx #@var{xx}:32
 109 Immediate 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
 111 requires this nor uses it---the data size required is taken from
 112 context.
 113
 114 @item @code{@@}@code{@@}@var{aa}
 115 @itemx @code{@@}@code{@@}@var{aa}:8
 116 Memory indirect.  You may specify the @samp{:8} for clarity, if you
 117 wish; 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})
 125 The H8/300 family has no hardware floating point, but the @code{.float}
 126 directive generates @sc{ieee} floating-point numbers for compatibility
 127 with 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 only one machine-dependent directive for the
 138 H8/300:
 139
 140 @table @code
 141 @cindex H8/300H, assembling for
 142 @item .h8300h
 143 Recognize and emit additional instructions for the H8/300H variant, and
 144 also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
 145 for the H8/300 family.
 146 @end table
 147
 148 On the H8/300 family (including the H8/300H) @samp{.word} directives
 149 generate 16-bit numbers.
 150
 151 @node H8/300 Opcodes
 152 @section Opcodes
 153
 154 @cindex H8/300 opcode summary
 155 @cindex opcode summary, H8/300
 156 @cindex mnemonics, H8/300
 157 @cindex instruction summary, H8/300
 158 For detailed information on the H8/300 machine instruction set, see
 159 @cite{H8/300 Series Programming Manual} (Hitachi ADE--602--025).  For
 160 information specific to the H8/300H, see @cite{H8/300H Series
 161 Programming Manual} (Hitachi).
 162
 163 @code{@value{AS}} implements all the standard H8/300 opcodes.  No additional
 164 pseudo-instructions are needed on this family.
 165
 166 @ifset SMALL
 167 @c this table, due to the multi-col faking and hardcoded order, looks silly
 168 @c except in smallbook.  See comments below "@set SMALL" near top of this file.
 169
 170 The following table summarizes the H8/300 opcodes, and their arguments.
 171 Entries marked @samp{*} are opcodes used only on the H8/300H.
 172
 173 @smallexample
 174 @c Using @group seems to use the normal baselineskip, not the smallexample
 175 @c baselineskip; looks approx doublespaced.
 176          @i{Legend:}
 177             Rs   @r{source register}
 178             Rd   @r{destination register}
 179             abs  @r{absolute address}
 180             imm  @r{immediate data}
 181          disp:N  @r{N-bit displacement from a register}
 182         pcrel:N  @r{N-bit displacement relative to program counter}
 183
 184    add.b #imm,rd              *  andc #imm,ccr
 185    add.b rs,rd                   band #imm,rd
 186    add.w rs,rd                   band #imm,@@rd
 187 *  add.w #imm,rd                 band #imm,@@abs:8
 188 *  add.l rs,rd                   bra  pcrel:8
 189 *  add.l #imm,rd              *  bra  pcrel:16
 190    adds #imm,rd                  bt   pcrel:8
 191    addx #imm,rd               *  bt   pcrel:16
 192    addx rs,rd                    brn  pcrel:8
 193    and.b #imm,rd              *  brn  pcrel:16
 194    and.b rs,rd                   bf   pcrel:8
 195 *  and.w rs,rd                *  bf   pcrel:16
 196 *  and.w #imm,rd                 bhi  pcrel:8
 197 *  and.l #imm,rd              *  bhi  pcrel:16
 198 *  and.l rs,rd                   bls  pcrel:8
 199 @page
 200 *  bls  pcrel:16                 bld  #imm,rd
 201    bcc  pcrel:8                  bld  #imm,@@rd
 202 *  bcc  pcrel:16                 bld  #imm,@@abs:8
 203    bhs  pcrel:8                  bnot #imm,rd
 204 *  bhs  pcrel:16                 bnot #imm,@@rd
 205    bcs  pcrel:8                  bnot #imm,@@abs:8
 206 *  bcs  pcrel:16                 bnot rs,rd
 207    blo  pcrel:8                  bnot rs,@@rd
 208 *  blo  pcrel:16                 bnot rs,@@abs:8
 209    bne  pcrel:8                  bor  #imm,rd
 210 *  bne  pcrel:16                 bor  #imm,@@rd
 211    beq  pcrel:8                  bor  #imm,@@abs:8
 212 *  beq  pcrel:16                 bset #imm,rd
 213    bvc  pcrel:8                  bset #imm,@@rd
 214 *  bvc  pcrel:16                 bset #imm,@@abs:8
 215    bvs  pcrel:8                  bset rs,rd
 216 *  bvs  pcrel:16                 bset rs,@@rd
 217    bpl  pcrel:8                  bset rs,@@abs:8
 218 *  bpl  pcrel:16                 bsr  pcrel:8
 219    bmi  pcrel:8                  bsr  pcrel:16
 220 *  bmi  pcrel:16                 bst  #imm,rd
 221    bge  pcrel:8                  bst  #imm,@@rd
 222 *  bge  pcrel:16                 bst  #imm,@@abs:8
 223    blt  pcrel:8                  btst #imm,rd
 224 *  blt  pcrel:16                 btst #imm,@@rd
 225    bgt  pcrel:8                  btst #imm,@@abs:8
 226 *  bgt  pcrel:16                 btst rs,rd
 227    ble  pcrel:8                  btst rs,@@rd
 228 *  ble  pcrel:16                 btst rs,@@abs:8
 229    bclr #imm,rd                  bxor #imm,rd
 230    bclr #imm,@@rd                 bxor #imm,@@rd
 231    bclr #imm,@@abs:8              bxor #imm,@@abs:8
 232    bclr rs,rd                    cmp.b #imm,rd
 233    bclr rs,@@rd                   cmp.b rs,rd
 234    bclr rs,@@abs:8                cmp.w rs,rd
 235    biand #imm,rd                 cmp.w rs,rd
 236    biand #imm,@@rd             *  cmp.w #imm,rd
 237    biand #imm,@@abs:8          *  cmp.l #imm,rd
 238    bild #imm,rd               *  cmp.l rs,rd
 239    bild #imm,@@rd                 daa  rs
 240    bild #imm,@@abs:8              das  rs
 241    bior #imm,rd                  dec.b rs
 242    bior #imm,@@rd              *  dec.w #imm,rd
 243    bior #imm,@@abs:8           *  dec.l #imm,rd
 244    bist #imm,rd                  divxu.b rs,rd
 245    bist #imm,@@rd              *  divxu.w rs,rd
 246    bist #imm,@@abs:8           *  divxs.b rs,rd
 247    bixor #imm,rd              *  divxs.w rs,rd
 248    bixor #imm,@@rd                eepmov
 249    bixor #imm,@@abs:8          *  eepmovw
 250 @page
 251 *  exts.w rd                     mov.w rs,@@abs:16
 252 *  exts.l rd                  *  mov.l #imm,rd
 253 *  extu.w rd                  *  mov.l rs,rd
 254 *  extu.l rd                  *  mov.l @@rs,rd
 255    inc  rs                    *  mov.l @@(disp:16,rs),rd
 256 *  inc.w #imm,rd              *  mov.l @@(disp:24,rs),rd
 257 *  inc.l #imm,rd              *  mov.l @@rs+,rd
 258    jmp  @@rs                   *  mov.l @@abs:16,rd
 259    jmp  abs                   *  mov.l @@abs:24,rd
 260    jmp  @@@@abs:8               *  mov.l rs,@@rd
 261    jsr  @@rs                   *  mov.l rs,@@(disp:16,rd)
 262    jsr  abs                   *  mov.l rs,@@(disp:24,rd)
 263    jsr  @@@@abs:8               *  mov.l rs,@@-rd
 264    ldc  #imm,ccr              *  mov.l rs,@@abs:16
 265    ldc  rs,ccr                *  mov.l rs,@@abs:24
 266 *  ldc  @@abs:16,ccr              movfpe @@abs:16,rd
 267 *  ldc  @@abs:24,ccr              movtpe rs,@@abs:16
 268 *  ldc  @@(disp:16,rs),ccr        mulxu.b rs,rd
 269 *  ldc  @@(disp:24,rs),ccr     *  mulxu.w rs,rd
 270 *  ldc  @@rs+,ccr              *  mulxs.b rs,rd
 271 *  ldc  @@rs,ccr               *  mulxs.w rs,rd
 272 *  mov.b @@(disp:24,rs),rd        neg.b rs
 273 *  mov.b rs,@@(disp:24,rd)     *  neg.w rs
 274    mov.b @@abs:16,rd           *  neg.l rs
 275    mov.b rs,rd                   nop
 276    mov.b @@abs:8,rd               not.b rs
 277    mov.b rs,@@abs:8            *  not.w rs
 278    mov.b rs,rd                *  not.l rs
 279    mov.b #imm,rd                 or.b #imm,rd
 280    mov.b @@rs,rd                  or.b rs,rd
 281    mov.b @@(disp:16,rs),rd     *  or.w #imm,rd
 282    mov.b @@rs+,rd              *  or.w rs,rd
 283    mov.b @@abs:8,rd            *  or.l #imm,rd
 284    mov.b rs,@@rd               *  or.l rs,rd
 285    mov.b rs,@@(disp:16,rd)        orc  #imm,ccr
 286    mov.b rs,@@-rd                 pop.w rs
 287    mov.b rs,@@abs:8            *  pop.l rs
 288    mov.w rs,@@rd                  push.w rs
 289 *  mov.w @@(disp:24,rs),rd     *  push.l rs
 290 *  mov.w rs,@@(disp:24,rd)        rotl.b rs
 291 *  mov.w @@abs:24,rd           *  rotl.w rs
 292 *  mov.w rs,@@abs:24           *  rotl.l rs
 293    mov.w rs,rd                   rotr.b rs
 294    mov.w #imm,rd              *  rotr.w rs
 295    mov.w @@rs,rd               *  rotr.l rs
 296    mov.w @@(disp:16,rs),rd        rotxl.b rs
 297    mov.w @@rs+,rd              *  rotxl.w rs
 298    mov.w @@abs:16,rd           *  rotxl.l rs
 299    mov.w rs,@@(disp:16,rd)        rotxr.b rs
 300    mov.w rs,@@-rd              *  rotxr.w rs
 301 @page
 302 *  rotxr.l rs                 *  stc  ccr,@@(disp:24,rd)
 303    bpt                        *  stc  ccr,@@-rd
 304    rte                        *  stc  ccr,@@abs:16
 305    rts                        *  stc  ccr,@@abs:24
 306    shal.b rs                     sub.b rs,rd
 307 *  shal.w rs                     sub.w rs,rd
 308 *  shal.l rs                  *  sub.w #imm,rd
 309    shar.b rs                  *  sub.l rs,rd
 310 *  shar.w rs                  *  sub.l #imm,rd
 311 *  shar.l rs                     subs #imm,rd
 312    shll.b rs                     subx #imm,rd
 313 *  shll.w rs                     subx rs,rd
 314 *  shll.l rs                  *  trapa #imm
 315    shlr.b rs                     xor  #imm,rd
 316 *  shlr.w rs                     xor  rs,rd
 317 *  shlr.l rs                  *  xor.w #imm,rd
 318    sleep                      *  xor.w rs,rd
 319    stc  ccr,rd                *  xor.l #imm,rd
 320 *  stc  ccr,@@rs               *  xor.l rs,rd
 321 *  stc  ccr,@@(disp:16,rd)        xorc #imm,ccr
 322 @end smallexample
 323 @end ifset
 324
 325 @cindex size suffixes, H8/300
 326 @cindex H8/300 size suffixes
 327 Four H8/300 instructions (@code{add}, @code{cmp}, @code{mov},
 328 @code{sub}) are defined with variants using the suffixes @samp{.b},
 329 @samp{.w}, and @samp{.l} to specify the size of a memory operand.
 330 @code{@value{AS}} supports these suffixes, but does not require them;
 331 since one of the operands is always a register, @code{@value{AS}} can
 332 deduce the correct size.
 333
 334 For example, since @code{r0} refers to a 16-bit register,
 335 @example
 336 mov    r0,@@foo
 337 @exdent is equivalent to
 338 mov.w  r0,@@foo
 339 @end example
 340
 341 If you use the size suffixes, @code{@value{AS}} issues a warning when
 342 the suffix and the register size do not match.