gas/doc/c-h8300.texi

   1 @c Copyright (C) 1991, 1992, 1993, 1994, 1995, 2003, 2008, 2011
   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
  24 @cindex options, H8/300
  25 The Renesas H8/300 version of @code{@value{AS}} has one
  26 machine-dependent option:
  27
  28 @c man begin OPTIONS
  29 @table @gcctabopt
  30 @item -h-tick-hex
  31 Support H'00 style hex constants in addition to 0x00 style.
  32
  33 @end table
  34 @c man end
  35
  36 @node H8/300 Syntax
  37 @section Syntax
  38 @menu
  39 * H8/300-Chars::                Special Characters
  40 * H8/300-Regs::                 Register Names
  41 * H8/300-Addressing::           Addressing Modes
  42 @end menu
  43
  44 @node H8/300-Chars
  45 @subsection Special Characters
  46
  47 @cindex line comment character, H8/300
  48 @cindex H8/300 line comment character
  49 @samp{;} is the line comment character.
  50
  51 @cindex line separator, H8/300
  52 @cindex statement separator, H8/300
  53 @cindex H8/300 line separator
  54 @samp{$} can be used instead of a newline to separate statements.
  55 Therefore @emph{you may not use @samp{$} in symbol names} on the H8/300.
  56
  57 @node H8/300-Regs
  58 @subsection Register Names
  59
  60 @cindex H8/300 registers
  61 @cindex register names, H8/300
  62 You can use predefined symbols of the form @samp{r@var{n}h} and
  63 @samp{r@var{n}l} to refer to the H8/300 registers as sixteen 8-bit
  64 general-purpose registers.  @var{n} is a digit from @samp{0} to
  65 @samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
  66 register names.
  67
  68 You can also use the eight predefined symbols @samp{r@var{n}} to refer
  69 to the H8/300 registers as 16-bit registers (you must use this form for
  70 addressing).
  71
  72 On the H8/300H, you can also use the eight predefined symbols
  73 @samp{er@var{n}} (@samp{er0} @dots{} @samp{er7}) to refer to the 32-bit
  74 general purpose registers.
  75
  76 The two control registers are called @code{pc} (program counter; a
  77 16-bit register, except on the H8/300H where it is 24 bits) and
  78 @code{ccr} (condition code register; an 8-bit register).  @code{r7} is
  79 used as the stack pointer, and can also be called @code{sp}.
  80
  81 @node H8/300-Addressing
  82 @subsection Addressing Modes
  83
  84 @cindex addressing modes, H8/300
  85 @cindex H8/300 addressing modes
  86 @value{AS} understands the following addressing modes for the H8/300:
  87 @table @code
  88 @item r@var{n}
  89 Register direct
  90
  91 @item @@r@var{n}
  92 Register indirect
  93
  94 @need 1200
  95 @item @@(@var{d}, r@var{n})
  96 @itemx @@(@var{d}:16, r@var{n})
  97 @itemx @@(@var{d}:24, r@var{n})
  98 Register indirect: 16-bit or 24-bit displacement @var{d} from register
  99 @var{n}.  (24-bit displacements are only meaningful on the H8/300H.)
 100
 101 @item @@r@var{n}+
 102 Register indirect with post-increment
 103
 104 @item @@-r@var{n}
 105 Register indirect with pre-decrement
 106
 107 @item @code{@@}@var{aa}
 108 @itemx @code{@@}@var{aa}:8
 109 @itemx @code{@@}@var{aa}:16
 110 @itemx @code{@@}@var{aa}:24
 111 Absolute address @code{aa}.  (The address size @samp{:24} only makes
 112 sense on the H8/300H.)
 113
 114 @item #@var{xx}
 115 @itemx #@var{xx}:8
 116 @itemx #@var{xx}:16
 117 @itemx #@var{xx}:32
 118 Immediate data @var{xx}.  You may specify the @samp{:8}, @samp{:16}, or
 119 @samp{:32} for clarity, if you wish; but @code{@value{AS}} neither
 120 requires this nor uses it---the data size required is taken from
 121 context.
 122
 123 @item @code{@@}@code{@@}@var{aa}
 124 @itemx @code{@@}@code{@@}@var{aa}:8
 125 Memory indirect.  You may specify the @samp{:8} for clarity, if you
 126 wish; but @code{@value{AS}} neither requires this nor uses it.
 127 @end table
 128
 129 @node H8/300 Floating Point
 130 @section Floating Point
 131
 132 @cindex floating point, H8/300 (@sc{ieee})
 133 @cindex H8/300 floating point (@sc{ieee})
 134 The H8/300 family has no hardware floating point, but the @code{.float}
 135 directive generates @sc{ieee} floating-point numbers for compatibility
 136 with other development tools.
 137
 138 @page
 139 @node H8/300 Directives
 140 @section H8/300 Machine Directives
 141
 142 @cindex H8/300 machine directives (none)
 143 @cindex machine directives, H8/300 (none)
 144 @cindex @code{word} directive, H8/300
 145 @cindex @code{int} directive, H8/300
 146 @code{@value{AS}} has the following machine-dependent directives for
 147 the H8/300:
 148
 149 @table @code
 150 @cindex H8/300H, assembling for
 151 @item .h8300h
 152 Recognize and emit additional instructions for the H8/300H variant, and
 153 also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
 154 for the H8/300 family.
 155
 156 @item .h8300s
 157 Recognize and emit additional instructions for the H8S variant, and
 158 also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
 159 for the H8/300 family.
 160
 161 @item .h8300hn
 162 Recognize and emit additional instructions for the H8/300H variant in
 163 normal mode, and also make @code{.int} emit 32-bit numbers rather than
 164 the usual (16-bit) for the H8/300 family.
 165
 166 @item .h8300sn
 167 Recognize and emit additional instructions for the H8S variant in
 168 normal mode, and also make @code{.int} emit 32-bit numbers rather than
 169 the usual (16-bit) for the H8/300 family.
 170 @end table
 171
 172 On the H8/300 family (including the H8/300H) @samp{.word} directives
 173 generate 16-bit numbers.
 174
 175 @node H8/300 Opcodes
 176 @section Opcodes
 177
 178 @cindex H8/300 opcode summary
 179 @cindex opcode summary, H8/300
 180 @cindex mnemonics, H8/300
 181 @cindex instruction summary, H8/300
 182 For detailed information on the H8/300 machine instruction set, see
 183 @cite{H8/300 Series Programming Manual}.  For information specific to
 184 the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
 185
 186 @code{@value{AS}} implements all the standard H8/300 opcodes.  No additional
 187 pseudo-instructions are needed on this family.
 188
 189 @ifset SMALL
 190 @c this table, due to the multi-col faking and hardcoded order, looks silly
 191 @c except in smallbook.  See comments below "@set SMALL" near top of this file.
 192
 193 The following table summarizes the H8/300 opcodes, and their arguments.
 194 Entries marked @samp{*} are opcodes used only on the H8/300H.
 195
 196 @smallexample
 197 @c Using @group seems to use the normal baselineskip, not the smallexample
 198 @c baselineskip; looks approx doublespaced.
 199          @i{Legend:}
 200             Rs   @r{source register}
 201             Rd   @r{destination register}
 202             abs  @r{absolute address}
 203             imm  @r{immediate data}
 204          disp:N  @r{N-bit displacement from a register}
 205         pcrel:N  @r{N-bit displacement relative to program counter}
 206
 207    add.b #imm,rd              *  andc #imm,ccr
 208    add.b rs,rd                   band #imm,rd
 209    add.w rs,rd                   band #imm,@@rd
 210 *  add.w #imm,rd                 band #imm,@@abs:8
 211 *  add.l rs,rd                   bra  pcrel:8
 212 *  add.l #imm,rd              *  bra  pcrel:16
 213    adds #imm,rd                  bt   pcrel:8
 214    addx #imm,rd               *  bt   pcrel:16
 215    addx rs,rd                    brn  pcrel:8
 216    and.b #imm,rd              *  brn  pcrel:16
 217    and.b rs,rd                   bf   pcrel:8
 218 *  and.w rs,rd                *  bf   pcrel:16
 219 *  and.w #imm,rd                 bhi  pcrel:8
 220 *  and.l #imm,rd              *  bhi  pcrel:16
 221 *  and.l rs,rd                   bls  pcrel:8
 222 @page
 223 *  bls  pcrel:16                 bld  #imm,rd
 224    bcc  pcrel:8                  bld  #imm,@@rd
 225 *  bcc  pcrel:16                 bld  #imm,@@abs:8
 226    bhs  pcrel:8                  bnot #imm,rd
 227 *  bhs  pcrel:16                 bnot #imm,@@rd
 228    bcs  pcrel:8                  bnot #imm,@@abs:8
 229 *  bcs  pcrel:16                 bnot rs,rd
 230    blo  pcrel:8                  bnot rs,@@rd
 231 *  blo  pcrel:16                 bnot rs,@@abs:8
 232    bne  pcrel:8                  bor  #imm,rd
 233 *  bne  pcrel:16                 bor  #imm,@@rd
 234    beq  pcrel:8                  bor  #imm,@@abs:8
 235 *  beq  pcrel:16                 bset #imm,rd
 236    bvc  pcrel:8                  bset #imm,@@rd
 237 *  bvc  pcrel:16                 bset #imm,@@abs:8
 238    bvs  pcrel:8                  bset rs,rd
 239 *  bvs  pcrel:16                 bset rs,@@rd
 240    bpl  pcrel:8                  bset rs,@@abs:8
 241 *  bpl  pcrel:16                 bsr  pcrel:8
 242    bmi  pcrel:8                  bsr  pcrel:16
 243 *  bmi  pcrel:16                 bst  #imm,rd
 244    bge  pcrel:8                  bst  #imm,@@rd
 245 *  bge  pcrel:16                 bst  #imm,@@abs:8
 246    blt  pcrel:8                  btst #imm,rd
 247 *  blt  pcrel:16                 btst #imm,@@rd
 248    bgt  pcrel:8                  btst #imm,@@abs:8
 249 *  bgt  pcrel:16                 btst rs,rd
 250    ble  pcrel:8                  btst rs,@@rd
 251 *  ble  pcrel:16                 btst rs,@@abs:8
 252    bclr #imm,rd                  bxor #imm,rd
 253    bclr #imm,@@rd                 bxor #imm,@@rd
 254    bclr #imm,@@abs:8              bxor #imm,@@abs:8
 255    bclr rs,rd                    cmp.b #imm,rd
 256    bclr rs,@@rd                   cmp.b rs,rd
 257    bclr rs,@@abs:8                cmp.w rs,rd
 258    biand #imm,rd                 cmp.w rs,rd
 259    biand #imm,@@rd             *  cmp.w #imm,rd
 260    biand #imm,@@abs:8          *  cmp.l #imm,rd
 261    bild #imm,rd               *  cmp.l rs,rd
 262    bild #imm,@@rd                 daa  rs
 263    bild #imm,@@abs:8              das  rs
 264    bior #imm,rd                  dec.b rs
 265    bior #imm,@@rd              *  dec.w #imm,rd
 266    bior #imm,@@abs:8           *  dec.l #imm,rd
 267    bist #imm,rd                  divxu.b rs,rd
 268    bist #imm,@@rd              *  divxu.w rs,rd
 269    bist #imm,@@abs:8           *  divxs.b rs,rd
 270    bixor #imm,rd              *  divxs.w rs,rd
 271    bixor #imm,@@rd                eepmov
 272    bixor #imm,@@abs:8          *  eepmovw
 273 @page
 274 *  exts.w rd                     mov.w rs,@@abs:16
 275 *  exts.l rd                  *  mov.l #imm,rd
 276 *  extu.w rd                  *  mov.l rs,rd
 277 *  extu.l rd                  *  mov.l @@rs,rd
 278    inc  rs                    *  mov.l @@(disp:16,rs),rd
 279 *  inc.w #imm,rd              *  mov.l @@(disp:24,rs),rd
 280 *  inc.l #imm,rd              *  mov.l @@rs+,rd
 281    jmp  @@rs                   *  mov.l @@abs:16,rd
 282    jmp  abs                   *  mov.l @@abs:24,rd
 283    jmp  @@@@abs:8               *  mov.l rs,@@rd
 284    jsr  @@rs                   *  mov.l rs,@@(disp:16,rd)
 285    jsr  abs                   *  mov.l rs,@@(disp:24,rd)
 286    jsr  @@@@abs:8               *  mov.l rs,@@-rd
 287    ldc  #imm,ccr              *  mov.l rs,@@abs:16
 288    ldc  rs,ccr                *  mov.l rs,@@abs:24
 289 *  ldc  @@abs:16,ccr              movfpe @@abs:16,rd
 290 *  ldc  @@abs:24,ccr              movtpe rs,@@abs:16
 291 *  ldc  @@(disp:16,rs),ccr        mulxu.b rs,rd
 292 *  ldc  @@(disp:24,rs),ccr     *  mulxu.w rs,rd
 293 *  ldc  @@rs+,ccr              *  mulxs.b rs,rd
 294 *  ldc  @@rs,ccr               *  mulxs.w rs,rd
 295 *  mov.b @@(disp:24,rs),rd        neg.b rs
 296 *  mov.b rs,@@(disp:24,rd)     *  neg.w rs
 297    mov.b @@abs:16,rd           *  neg.l rs
 298    mov.b rs,rd                   nop
 299    mov.b @@abs:8,rd               not.b rs
 300    mov.b rs,@@abs:8            *  not.w rs
 301    mov.b rs,rd                *  not.l rs
 302    mov.b #imm,rd                 or.b #imm,rd
 303    mov.b @@rs,rd                  or.b rs,rd
 304    mov.b @@(disp:16,rs),rd     *  or.w #imm,rd
 305    mov.b @@rs+,rd              *  or.w rs,rd
 306    mov.b @@abs:8,rd            *  or.l #imm,rd
 307    mov.b rs,@@rd               *  or.l rs,rd
 308    mov.b rs,@@(disp:16,rd)        orc  #imm,ccr
 309    mov.b rs,@@-rd                 pop.w rs
 310    mov.b rs,@@abs:8            *  pop.l rs
 311    mov.w rs,@@rd                  push.w rs
 312 *  mov.w @@(disp:24,rs),rd     *  push.l rs
 313 *  mov.w rs,@@(disp:24,rd)        rotl.b rs
 314 *  mov.w @@abs:24,rd           *  rotl.w rs
 315 *  mov.w rs,@@abs:24           *  rotl.l rs
 316    mov.w rs,rd                   rotr.b rs
 317    mov.w #imm,rd              *  rotr.w rs
 318    mov.w @@rs,rd               *  rotr.l rs
 319    mov.w @@(disp:16,rs),rd        rotxl.b rs
 320    mov.w @@rs+,rd              *  rotxl.w rs
 321    mov.w @@abs:16,rd           *  rotxl.l rs
 322    mov.w rs,@@(disp:16,rd)        rotxr.b rs
 323    mov.w rs,@@-rd              *  rotxr.w rs
 324 @page
 325 *  rotxr.l rs                 *  stc  ccr,@@(disp:24,rd)
 326    bpt                        *  stc  ccr,@@-rd
 327    rte                        *  stc  ccr,@@abs:16
 328    rts                        *  stc  ccr,@@abs:24
 329    shal.b rs                     sub.b rs,rd
 330 *  shal.w rs                     sub.w rs,rd
 331 *  shal.l rs                  *  sub.w #imm,rd
 332    shar.b rs                  *  sub.l rs,rd
 333 *  shar.w rs                  *  sub.l #imm,rd
 334 *  shar.l rs                     subs #imm,rd
 335    shll.b rs                     subx #imm,rd
 336 *  shll.w rs                     subx rs,rd
 337 *  shll.l rs                  *  trapa #imm
 338    shlr.b rs                     xor  #imm,rd
 339 *  shlr.w rs                     xor  rs,rd
 340 *  shlr.l rs                  *  xor.w #imm,rd
 341    sleep                      *  xor.w rs,rd
 342    stc  ccr,rd                *  xor.l #imm,rd
 343 *  stc  ccr,@@rs               *  xor.l rs,rd
 344 *  stc  ccr,@@(disp:16,rd)        xorc #imm,ccr
 345 @end smallexample
 346 @end ifset
 347
 348 @cindex size suffixes, H8/300
 349 @cindex H8/300 size suffixes
 350 Four H8/300 instructions (@code{add}, @code{cmp}, @code{mov},
 351 @code{sub}) are defined with variants using the suffixes @samp{.b},
 352 @samp{.w}, and @samp{.l} to specify the size of a memory operand.
 353 @code{@value{AS}} supports these suffixes, but does not require them;
 354 since one of the operands is always a register, @code{@value{AS}} can
 355 deduce the correct size.
 356
 357 For example, since @code{r0} refers to a 16-bit register,
 358 @example
 359 mov    r0,@@foo
 360 @exdent is equivalent to
 361 mov.w  r0,@@foo
 362 @end example
 363
 364 If you use the size suffixes, @code{@value{AS}} issues a warning when
 365 the suffix and the register size do not match.