GNU Info
(as.info)H8/500 Opcodes
Opcodes
-------
For detailed information on the H8/500 machine instruction set, see
`H8/500 Series Programming Manual' (Hitachi M21T001).
`as' implements all the standard H8/500 opcodes. No additional
pseudo-instructions are needed on this family.
The following table summarizes H8/500 opcodes and their operands:
Legend:
abs8 8-bit absolute address
abs16 16-bit absolute address
abs24 24-bit absolute address
crb `ccr', `br', `ep', `dp', `tp', `dp'
disp8 8-bit displacement
ea `rn', `@rn', `@(d:8, rn)', `@(d:16, rn)',
`@-rn', `@rn+', `@aa:8', `@aa:16',
`#xx:8', `#xx:16'
ea_mem `@rn', `@(d:8, rn)', `@(d:16, rn)',
`@-rn', `@rn+', `@aa:8', `@aa:16'
ea_noimm `rn', `@rn', `@(d:8, rn)', `@(d:16, rn)',
`@-rn', `@rn+', `@aa:8', `@aa:16'
fp r6
imm4 4-bit immediate data
imm8 8-bit immediate data
imm16 16-bit immediate data
pcrel8 8-bit offset from program counter
pcrel16 16-bit offset from program counter
qim `-2', `-1', `1', `2'
rd any register
rs a register distinct from rd
rlist comma-separated list of registers in parentheses;
register ranges `rd-rs' are allowed
sp stack pointer (`r7')
sr status register
sz size; `.b' or `.w'. If omitted, default `.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
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
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