| @c Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. |
| @c This is part of the GAS manual. |
| @c For copying conditions, see the file as.texinfo. |
| @page |
| @node H8/500-Dependent |
| @chapter H8/500 Dependent Features |
| |
| @cindex H8/500 support |
| @menu |
| * H8/500 Options:: Options |
| * H8/500 Syntax:: Syntax |
| * H8/500 Floating Point:: Floating Point |
| * H8/500 Directives:: H8/500 Machine Directives |
| * H8/500 Opcodes:: Opcodes |
| @end menu |
| |
| @node H8/500 Options |
| @section Options |
| |
| @cindex H8/500 options (none) |
| @cindex options, H8/500 (none) |
| @code{@value{AS}} has no additional command-line options for the Hitachi |
| H8/500 family. |
| |
| @node H8/500 Syntax |
| @section Syntax |
| |
| @menu |
| * H8/500-Chars:: Special Characters |
| * H8/500-Regs:: Register Names |
| * H8/500-Addressing:: Addressing Modes |
| @end menu |
| |
| @node H8/500-Chars |
| @subsection Special Characters |
| |
| @cindex line comment character, H8/500 |
| @cindex H8/500 line comment character |
| @samp{!} is the line comment character. |
| |
| @cindex line separator, H8/500 |
| @cindex statement separator, H8/500 |
| @cindex H8/500 line separator |
| @samp{;} can be used instead of a newline to separate statements. |
| |
| @cindex symbol names, @samp{$} in |
| @cindex @code{$} in symbol names |
| Since @samp{$} has no special meaning, you may use it in symbol names. |
| |
| @node H8/500-Regs |
| @subsection Register Names |
| |
| @cindex H8/500 registers |
| @cindex registers, H8/500 |
| You can use the predefined symbols @samp{r0}, @samp{r1}, @samp{r2}, |
| @samp{r3}, @samp{r4}, @samp{r5}, @samp{r6}, and @samp{r7} to refer to |
| the H8/500 registers. |
| |
| The H8/500 also has these control registers: |
| |
| @table @code |
| @item cp |
| code pointer |
| |
| @item dp |
| data pointer |
| |
| @item bp |
| base pointer |
| |
| @item tp |
| stack top pointer |
| |
| @item ep |
| extra pointer |
| |
| @item sr |
| status register |
| |
| @item ccr |
| condition code register |
| @end table |
| |
| All registers are 16 bits long. To represent 32 bit numbers, use two |
| adjacent registers; for distant memory addresses, use one of the segment |
| pointers (@code{cp} for the program counter; @code{dp} for |
| @code{r0}--@code{r3}; @code{ep} for @code{r4} and @code{r5}; and |
| @code{tp} for @code{r6} and @code{r7}. |
| |
| @node H8/500-Addressing |
| @subsection Addressing Modes |
| |
| @cindex addressing modes, H8/500 |
| @cindex H8/500 addressing modes |
| @value{AS} understands the following addressing modes for the H8/500: |
| @table @code |
| @item R@var{n} |
| Register direct |
| |
| @item @@R@var{n} |
| Register indirect |
| |
| @item @@(d:8, R@var{n}) |
| Register indirect with 8 bit signed displacement |
| |
| @item @@(d:16, R@var{n}) |
| Register indirect with 16 bit signed displacement |
| |
| @item @@-R@var{n} |
| Register indirect with pre-decrement |
| |
| @item @@R@var{n}+ |
| Register indirect with post-increment |
| |
| @item @@@var{aa}:8 |
| 8 bit absolute address |
| |
| @item @@@var{aa}:16 |
| 16 bit absolute address |
| |
| @item #@var{xx}:8 |
| 8 bit immediate |
| |
| @item #@var{xx}:16 |
| 16 bit immediate |
| @end table |
| |
| @node H8/500 Floating Point |
| @section Floating Point |
| |
| @cindex floating point, H8/500 (@sc{ieee}) |
| @cindex H8/500 floating point (@sc{ieee}) |
| The H8/500 family has no hardware floating point, but the @code{.float} |
| directive generates @sc{ieee} floating-point numbers for compatibility |
| with other development tools. |
| |
| @node H8/500 Directives |
| @section H8/500 Machine Directives |
| |
| @cindex H8/500 machine directives (none) |
| @cindex machine directives, H8/500 (none) |
| @cindex @code{word} directive, H8/500 |
| @cindex @code{int} directive, H8/500 |
| @code{@value{AS}} has no machine-dependent directives for the H8/500. |
| However, on this platform the @samp{.int} and @samp{.word} directives |
| generate 16-bit numbers. |
| |
| @node H8/500 Opcodes |
| @section Opcodes |
| |
| @cindex H8/500 opcode summary |
| @cindex opcode summary, H8/500 |
| @cindex mnemonics, H8/500 |
| @cindex instruction summary, H8/500 |
| For detailed information on the H8/500 machine instruction set, see |
| @cite{H8/500 Series Programming Manual} (Hitachi M21T001). |
| |
| @code{@value{AS}} implements all the standard H8/500 opcodes. No additional |
| pseudo-instructions are needed on this family. |
| |
| @ifset SMALL |
| @c this table, due to the multi-col faking and hardcoded order, looks silly |
| @c except in smallbook. See comments below "@set SMALL" near top of this file. |
| |
| The following table summarizes H8/500 opcodes and their operands: |
| |
| @c Use @group if it ever works, instead of @page |
| @page |
| @smallexample |
| @i{Legend:} |
| abs8 @r{8-bit absolute address} |
| abs16 @r{16-bit absolute address} |
| abs24 @r{24-bit absolute address} |
| crb @r{@code{ccr}, @code{br}, @code{ep}, @code{dp}, @code{tp}, @code{dp}} |
| disp8 @r{8-bit displacement} |
| ea @r{@code{rn}, @code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},} |
| @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16},} |
| @r{@code{#xx:8}, @code{#xx:16}} |
| ea_mem @r{@code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},} |
| @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16}} |
| ea_noimm @r{@code{rn}, @code{@@rn}, @code{@@(d:8, rn)}, @code{@@(d:16, rn)},} |
| @r{@code{@@-rn}, @code{@@rn+}, @code{@@aa:8}, @code{@@aa:16}} |
| fp r6 |
| imm4 @r{4-bit immediate data} |
| imm8 @r{8-bit immediate data} |
| imm16 @r{16-bit immediate data} |
| pcrel8 @r{8-bit offset from program counter} |
| pcrel16 @r{16-bit offset from program counter} |
| qim @r{@code{-2}, @code{-1}, @code{1}, @code{2}} |
| rd @r{any register} |
| rs @r{a register distinct from rd} |
| rlist @r{comma-separated list of registers in parentheses;} |
| @r{register ranges @code{rd-rs} are allowed} |
| sp @r{stack pointer (@code{r7})} |
| sr @r{status register} |
| sz @r{size; @samp{.b} or @samp{.w}. If omitted, default @samp{.w}} |
| |
| ldc[.b] ea,crb bcc[.w] pcrel16 |
| ldc[.w] ea,sr bcc[.b] pcrel8 |
| add[:q] sz qim,ea_noimm bhs[.w] pcrel16 |
| add[:g] sz ea,rd bhs[.b] pcrel8 |
| adds sz ea,rd bcs[.w] pcrel16 |
| addx sz ea,rd bcs[.b] pcrel8 |
| and sz ea,rd blo[.w] pcrel16 |
| andc[.b] imm8,crb blo[.b] pcrel8 |
| andc[.w] imm16,sr bne[.w] pcrel16 |
| bpt bne[.b] pcrel8 |
| bra[.w] pcrel16 beq[.w] pcrel16 |
| bra[.b] pcrel8 beq[.b] pcrel8 |
| bt[.w] pcrel16 bvc[.w] pcrel16 |
| bt[.b] pcrel8 bvc[.b] pcrel8 |
| brn[.w] pcrel16 bvs[.w] pcrel16 |
| brn[.b] pcrel8 bvs[.b] pcrel8 |
| bf[.w] pcrel16 bpl[.w] pcrel16 |
| bf[.b] pcrel8 bpl[.b] pcrel8 |
| bhi[.w] pcrel16 bmi[.w] pcrel16 |
| bhi[.b] pcrel8 bmi[.b] pcrel8 |
| bls[.w] pcrel16 bge[.w] pcrel16 |
| bls[.b] pcrel8 bge[.b] pcrel8 |
| @page |
| blt[.w] pcrel16 mov[:g][.b] imm8,ea_mem |
| blt[.b] pcrel8 mov[:g][.w] imm16,ea_mem |
| bgt[.w] pcrel16 movfpe[.b] ea,rd |
| bgt[.b] pcrel8 movtpe[.b] rs,ea_noimm |
| ble[.w] pcrel16 mulxu sz ea,rd |
| ble[.b] pcrel8 neg sz ea |
| bclr sz imm4,ea_noimm nop |
| bclr sz rs,ea_noimm not sz ea |
| bnot sz imm4,ea_noimm or sz ea,rd |
| bnot sz rs,ea_noimm orc[.b] imm8,crb |
| bset sz imm4,ea_noimm orc[.w] imm16,sr |
| bset sz rs,ea_noimm pjmp abs24 |
| bsr[.b] pcrel8 pjmp @@rd |
| bsr[.w] pcrel16 pjsr abs24 |
| btst sz imm4,ea_noimm pjsr @@rd |
| btst sz rs,ea_noimm prtd imm8 |
| clr sz ea prtd imm16 |
| cmp[:e][.b] imm8,rd prts |
| cmp[:i][.w] imm16,rd rotl sz ea |
| cmp[:g].b imm8,ea_noimm rotr sz ea |
| cmp[:g][.w] imm16,ea_noimm rotxl sz ea |
| Cmp[:g] sz ea,rd rotxr sz ea |
| dadd rs,rd rtd imm8 |
| divxu sz ea,rd rtd imm16 |
| dsub rs,rd rts |
| exts[.b] rd scb/f rs,pcrel8 |
| extu[.b] rd scb/ne rs,pcrel8 |
| jmp @@rd scb/eq rs,pcrel8 |
| jmp @@(imm8,rd) shal sz ea |
| jmp @@(imm16,rd) shar sz ea |
| jmp abs16 shll sz ea |
| jsr @@rd shlr sz ea |
| jsr @@(imm8,rd) sleep |
| jsr @@(imm16,rd) stc[.b] crb,ea_noimm |
| jsr abs16 stc[.w] sr,ea_noimm |
| ldm @@sp+,(rlist) stm (rlist),@@-sp |
| link fp,imm8 sub sz ea,rd |
| link fp,imm16 subs sz ea,rd |
| mov[:e][.b] imm8,rd subx sz ea,rd |
| mov[:i][.w] imm16,rd swap[.b] rd |
| mov[:l][.w] abs8,rd tas[.b] ea |
| mov[:l].b abs8,rd trapa imm4 |
| mov[:s][.w] rs,abs8 trap/vs |
| mov[:s].b rs,abs8 tst sz ea |
| mov[:f][.w] @@(disp8,fp),rd unlk fp |
| mov[:f][.w] rs,@@(disp8,fp) xch[.w] rs,rd |
| mov[:f].b @@(disp8,fp),rd xor sz ea,rd |
| mov[:f].b rs,@@(disp8,fp) xorc.b imm8,crb |
| mov[:g] sz rs,ea_mem xorc.w imm16,sr |
| mov[:g] sz ea,rd |
| @end smallexample |
| @end ifset |
