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5c: format assembly constant right shift encoding 0 as >>32

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This commit is contained in:
cinap_lenrek 2016-09-03 18:18:28 +02:00
parent b46a0e97ea
commit a5d8cd30bb
1 changed files with 6 additions and 2 deletions
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8
sys/src/cmd/5c/list.c
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@ -138,8 +138,12 @@ Dconv(Fmt *fp)
op = "<<>>->@>" + (((v>>5) & 3) << 1);
if(v & (1<<4))
snprint(str, sizeof str, "R%d%c%cR%d", v&15, op[0], op[1], (v>>8)&15);
else
snprint(str, sizeof str, "R%d%c%c%d", v&15, op[0], op[1], (v>>7)&31);
else {
int sh = (v>>7)&31;
if(sh == 0 && (v & (3<<5)) != 0)
sh = 32;
snprint(str, sizeof str, "R%d%c%c%d", v&15, op[0], op[1], sh);
}
if(a->reg != NREG)
snprint(str+strlen(str), sizeof(str)-strlen(str), "(R%d)", a->reg);
break;