gas/doc/c-h8500.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 @page
   6 @node H8/500-Dependent
   7 @chapter H8/500 Dependent Features
   8
   9 @cindex H8/500 support
  10 @menu
  11 * H8/500 Options::              Options
  12 * H8/500 Syntax::               Syntax
  13 * H8/500 Floating Point::       Floating Point
  14 * H8/500 Directives::           H8/500 Machine Directives
  15 * H8/500 Opcodes::              Opcodes
  16 @end menu
  17
  18 @node H8/500 Options
  19 @section Options
  20
  21 @cindex H8/500 options (none)
  22 @cindex options, H8/500 (none)
  23 @code{@value{AS}} has no additional command-line options for the
  24 Renesas (formerly Hitachi) H8/500 family.
  25
  26 @node H8/500 Syntax
  27 @section Syntax
  28
  29 @menu
  30 * H8/500-Chars::                Special Characters
  31 * H8/500-Regs::                 Register Names
  32 * H8/500-Addressing::           Addressing Modes
  33 @end menu
  34
  35 @node H8/500-Chars
  36 @subsection Special Characters
  37
  38 @cindex line comment character, H8/500
  39 @cindex H8/500 line comment character
  40 @samp{!} is the line comment character.
  41
  42 @cindex line separator, H8/500
  43 @cindex statement separator, H8/500
  44 @cindex H8/500 line separator
  45 @samp{;} can be used instead of a newline to separate statements.
  46
  47 @cindex symbol names, @samp{$} in
  48 @cindex @code{$} in symbol names
  49 Since @samp{$} has no special meaning, you may use it in symbol names.
  50
  51 @node H8/500-Regs
  52 @subsection Register Names
  53
  54 @cindex H8/500 registers
  55 @cindex registers, H8/500
  56 You can use the predefined symbols @samp{r0}, @samp{r1}, @samp{r2},
  57 @samp{r3}, @samp{r4}, @samp{r5}, @samp{r6}, and @samp{r7} to refer to
  58 the H8/500 registers.
  59
  60 The H8/500 also has these control registers:
  61
  62 @table @code
  63 @item cp
  64 code pointer
  65
  66 @item dp
  67 data pointer
  68
  69 @item bp
  70 base pointer
  71
  72 @item tp
  73 stack top pointer
  74
  75 @item ep
  76 extra pointer
  77
  78 @item sr
  79 status register
  80
  81 @item ccr
  82 condition code register
  83 @end table
  84
  85 All registers are 16 bits long.  To represent 32 bit numbers, use two
  86 adjacent registers; for distant memory addresses, use one of the segment
  87 pointers (@code{cp} for the program counter; @code{dp} for
  88 @code{r0}--@code{r3}; @code{ep} for @code{r4} and @code{r5}; and
  89 @code{tp} for @code{r6} and @code{r7}.
  90
  91 @node H8/500-Addressing
  92 @subsection Addressing Modes
  93
  94 @cindex addressing modes, H8/500
  95 @cindex H8/500 addressing modes
  96 @value{AS} understands the following addressing modes for the H8/500:
  97 @table @code
  98 @item R@var{n}
  99 Register direct
 100
 101 @item @@R@var{n}
 102 Register indirect
 103
 104 @item @@(d:8, R@var{n})
 105 Register indirect with 8 bit signed displacement
 106
 107 @item @@(d:16, R@var{n})
 108 Register indirect with 16 bit signed displacement
 109
 110 @item @@-R@var{n}
 111 Register indirect with pre-decrement
 112
 113 @item @@R@var{n}+
 114 Register indirect with post-increment
 115
 116 @item @@@var{aa}:8
 117 8 bit absolute address
 118
 119 @item @@@var{aa}:16
 120 16 bit absolute address
 121
 122 @item #@var{xx}:8
 123 8 bit immediate
 124
 125 @item #@var{xx}:16
 126 16 bit immediate
 127 @end table
 128
 129 @node H8/500 Floating Point
 130 @section Floating Point
 131
 132 @cindex floating point, H8/500 (@sc{ieee})
 133 @cindex H8/500 floating point (@sc{ieee})
 134 The H8/500 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 @node H8/500 Directives
 139 @section H8/500 Machine Directives
 140
 141 @cindex H8/500 machine directives (none)
 142 @cindex machine directives, H8/500 (none)
 143 @cindex @code{word} directive, H8/500
 144 @cindex @code{int} directive, H8/500
 145 @code{@value{AS}} has no machine-dependent directives for the H8/500.
 146 However, on this platform the @samp{.int} and @samp{.word} directives
 147 generate 16-bit numbers.
 148
 149 @node H8/500 Opcodes
 150 @section Opcodes
 151
 152 @cindex H8/500 opcode summary
 153 @cindex opcode summary, H8/500
 154 @cindex mnemonics, H8/500
 155 @cindex instruction summary, H8/500
 156 For detailed information on the H8/500 machine instruction set, see
 157 @cite{H8/500 Series Programming Manual} (Renesas M21T001).
 158
 159 @code{@value{AS}} implements all the standard H8/500 opcodes.  No additional
 160 pseudo-instructions are needed on this family.
 161
 162 @ifset SMALL
 163 @c this table, due to the multi-col faking and hardcoded order, looks silly
 164 @c except in smallbook.  See comments below "@set SMALL" near top of this file.
 165
 166 The following table summarizes H8/500 opcodes and their operands:
 167
 168 @c Use @group if it ever works, instead of @page
 169 @page
 170 @smallexample
 171 @i{Legend:}
 172 abs8      @r{8-bit absolute address}
 173 abs16     @r{16-bit absolute address}
 174 abs24     @r{24-bit absolute address}
 175 crb       @r{@code{ccr}, @code{br}, @code{ep}, @code{dp}, @code{tp}, @code{dp}}
 176 disp8     @r{8-bit displacement}
 177 ea        @r{@code{rn}, @code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},}
 178           @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16},}
 179           @r{@code{#xx:8}, @code{#xx:16}}
 180 ea_mem    @r{@code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},}
 181           @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16}}
 182 ea_noimm  @r{@code{rn}, @code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},}
 183           @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16}}
 184 fp        r6
 185 imm4      @r{4-bit immediate data}
 186 imm8      @r{8-bit immediate data}
 187 imm16     @r{16-bit immediate data}
 188 pcrel8    @r{8-bit offset from program counter}
 189 pcrel16   @r{16-bit offset from program counter}
 190 qim       @r{@code{-2}, @code{-1}, @code{1}, @code{2}}
 191 rd        @r{any register}
 192 rs        @r{a register distinct from rd}
 193 rlist     @r{comma-separated list of registers in parentheses;}
 194           @r{register ranges @code{rd-rs} are allowed}
 195 sp        @r{stack pointer (@code{r7})}
 196 sr        @r{status register}
 197 sz        @r{size; @samp{.b} or @samp{.w}.  If omitted, default @samp{.w}}
 198
 199 ldc[.b] ea,crb                 bcc[.w] pcrel16
 200 ldc[.w] ea,sr                  bcc[.b] pcrel8
 201 add[:q] sz qim,ea_noimm        bhs[.w] pcrel16
 202 add[:g] sz ea,rd               bhs[.b] pcrel8
 203 adds sz ea,rd                  bcs[.w] pcrel16
 204 addx sz ea,rd                  bcs[.b] pcrel8
 205 and sz ea,rd                   blo[.w] pcrel16
 206 andc[.b] imm8,crb              blo[.b] pcrel8
 207 andc[.w] imm16,sr              bne[.w] pcrel16
 208 bpt                            bne[.b] pcrel8
 209 bra[.w] pcrel16                beq[.w] pcrel16
 210 bra[.b] pcrel8                 beq[.b] pcrel8
 211 bt[.w] pcrel16                 bvc[.w] pcrel16
 212 bt[.b] pcrel8                  bvc[.b] pcrel8
 213 brn[.w] pcrel16                bvs[.w] pcrel16
 214 brn[.b] pcrel8                 bvs[.b] pcrel8
 215 bf[.w] pcrel16                 bpl[.w] pcrel16
 216 bf[.b] pcrel8                  bpl[.b] pcrel8
 217 bhi[.w] pcrel16                bmi[.w] pcrel16
 218 bhi[.b] pcrel8                 bmi[.b] pcrel8
 219 bls[.w] pcrel16                bge[.w] pcrel16
 220 bls[.b] pcrel8                 bge[.b] pcrel8
 221 @page
 222 blt[.w] pcrel16                mov[:g][.b] imm8,ea_mem
 223 blt[.b] pcrel8                 mov[:g][.w] imm16,ea_mem
 224 bgt[.w] pcrel16                movfpe[.b] ea,rd
 225 bgt[.b] pcrel8                 movtpe[.b] rs,ea_noimm
 226 ble[.w] pcrel16                mulxu sz ea,rd
 227 ble[.b] pcrel8                 neg sz ea
 228 bclr sz imm4,ea_noimm          nop
 229 bclr sz rs,ea_noimm            not sz ea
 230 bnot sz imm4,ea_noimm          or sz ea,rd
 231 bnot sz rs,ea_noimm            orc[.b] imm8,crb
 232 bset sz imm4,ea_noimm          orc[.w] imm16,sr
 233 bset sz rs,ea_noimm            pjmp abs24
 234 bsr[.b] pcrel8                 pjmp @@rd
 235 bsr[.w] pcrel16                pjsr abs24
 236 btst sz imm4,ea_noimm          pjsr @@rd
 237 btst sz rs,ea_noimm            prtd imm8
 238 clr sz ea                      prtd imm16
 239 cmp[:e][.b] imm8,rd            prts
 240 cmp[:i][.w] imm16,rd           rotl sz ea
 241 cmp[:g].b imm8,ea_noimm        rotr sz ea
 242 cmp[:g][.w] imm16,ea_noimm     rotxl sz ea
 243 Cmp[:g] sz ea,rd               rotxr sz ea
 244 dadd rs,rd                     rtd imm8
 245 divxu sz ea,rd                 rtd imm16
 246 dsub rs,rd                     rts
 247 exts[.b] rd                    scb/f rs,pcrel8
 248 extu[.b] rd                    scb/ne rs,pcrel8
 249 jmp @@rd                        scb/eq rs,pcrel8
 250 jmp @@(imm8,rd)                 shal sz ea
 251 jmp @@(imm16,rd)                shar sz ea
 252 jmp abs16                      shll sz ea
 253 jsr @@rd                        shlr sz ea
 254 jsr @@(imm8,rd)                 sleep
 255 jsr @@(imm16,rd)                stc[.b] crb,ea_noimm
 256 jsr abs16                      stc[.w] sr,ea_noimm
 257 ldm @@sp+,(rlist)               stm (rlist),@@-sp
 258 link fp,imm8                   sub sz ea,rd
 259 link fp,imm16                  subs sz ea,rd
 260 mov[:e][.b] imm8,rd            subx sz ea,rd
 261 mov[:i][.w] imm16,rd           swap[.b] rd
 262 mov[:l][.w] abs8,rd            tas[.b] ea
 263 mov[:l].b abs8,rd              trapa imm4
 264 mov[:s][.w] rs,abs8            trap/vs
 265 mov[:s].b rs,abs8              tst sz ea
 266 mov[:f][.w] @@(disp8,fp),rd     unlk fp
 267 mov[:f][.w] rs,@@(disp8,fp)     xch[.w] rs,rd
 268 mov[:f].b @@(disp8,fp),rd       xor sz ea,rd
 269 mov[:f].b rs,@@(disp8,fp)       xorc.b imm8,crb
 270 mov[:g] sz rs,ea_mem           xorc.w imm16,sr
 271 mov[:g] sz ea,rd
 272 @end smallexample
 273 @end ifset