diff options
| author | cinap_lenrek <cinap_lenrek@visitor-011.row-08.revision-party.de> | 2011-04-25 21:32:10 +0000 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@visitor-011.row-08.revision-party.de> | 2011-04-25 21:32:10 +0000 |
| commit | 028bd871a9934e74b0641aaccc145e8b6ee13b1b (patch) | |
| tree | 9f3dae7f977963b6e5b90e04ed40b76fecab6d53 /sys/src/cmd/aux/realemu | |
| parent | c988841a50eefd3a72c3a865f957df2d0f048f82 (diff) | |
realemu: complete bitttest ops (tested at revision 2011)
Diffstat (limited to 'sys/src/cmd/aux/realemu')
| -rw-r--r-- | sys/src/cmd/aux/realemu/xec.c | 59 |
1 files changed, 33 insertions, 26 deletions
diff --git a/sys/src/cmd/aux/realemu/xec.c b/sys/src/cmd/aux/realemu/xec.c index 4d81c4d5c..c39ad27b5 100644 --- a/sys/src/cmd/aux/realemu/xec.c +++ b/sys/src/cmd/aux/realemu/xec.c @@ -485,39 +485,43 @@ opror(Cpu *cpu, Inst *i) } static void -opbts(Cpu *cpu, Inst *i) +opbt(Cpu *cpu, Inst *i) { ulong a, m; - int n; - - a = ar(i->a1); - n = ar(i->a2) & 31; + int n, s; + Iarg *x; + + n = ar(i->a2); + x = i->a1; + s = x->len*8; + if(x->tag == TMEM){ + x = adup(x); + x->off += n / s; + x->off &= mask(i->alen*8); + } + a = ar(x); + n &= s-1; m = 1<<n; if(a & m) - cpu->reg[RFL] |= CF; - else { + cpu->reg[RFL] |= CF; + else cpu->reg[RFL] &= ~CF; - aw(i->a1, a | m); + switch(i->op){ + case OBT: + break; + case OBTS: + aw(x, a | m); + break; + case OBTR: + aw(x, a & ~m); + break; + case OBTC: + aw(x, a ^ m); + break; } } static void -opbtr(Cpu *cpu, Inst *i) -{ - ulong a, m; - int n; - - a = ar(i->a1); - n = ar(i->a2) & 31; - m = 1<<n; - if(a & m){ - cpu->reg[RFL] |= CF; - aw(i->a1, a & ~m); - } else - cpu->reg[RFL] &= ~CF; -} - -static void opbitscan(Cpu *cpu, Inst *i) { ulong a; @@ -1204,8 +1208,11 @@ static void (*exctab[NUMOP])(Cpu *cpu, Inst*) = { [OROL] = oprol, [OROR] = opror, - [OBTS] = opbts, - [OBTR] = opbtr, + [OBT] = opbt, + [OBTS] = opbt, + [OBTR] = opbt, + [OBTC] = opbt, + [OBSF] = opbitscan, [OBSR] = opbitscan, |