diff options
Diffstat (limited to 'src/cmd/5c/reg.c')
| -rw-r--r-- | src/cmd/5c/reg.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/src/cmd/5c/reg.c b/src/cmd/5c/reg.c index 1ccf74a35..42c5193de 100644 --- a/src/cmd/5c/reg.c +++ b/src/cmd/5c/reg.c @@ -66,12 +66,6 @@ rcmp(const void *a1, const void *a2) void regopt(Prog *p) { - USED(p); - // TODO(kaib): optimizer disabled because it smashes R8 when running out of registers - // the disable is unconventionally here because the call is in common code shared by 5c/6c/8c - return; - -#ifdef NOTDEF Reg *r, *r1, *r2; Prog *p1; int i, z; @@ -191,6 +185,14 @@ regopt(Prog *p) break; /* + * right side read + */ + case APLD: + for(z=0; z<BITS; z++) + r->use2.b[z] |= bit.b[z]; + break; + + /* * funny */ case ABL: @@ -492,7 +494,6 @@ brk: r1->link = freer; freer = firstr; } -#endif } void @@ -1149,12 +1150,13 @@ addreg(Adr *a, int rn) * 1 R1 * ... ... * 10 R10 + * 12 R12 */ int32 RtoB(int r) { - if(r < 2 || r >= REGTMP-2) // excluded R9 and R10 for m and g + if(r < 2 || (r >= REGTMP-2 && r != 12)) // excluded R9 and R10 for m and g, but not R12 return 0; return 1L << r; } @@ -1162,7 +1164,7 @@ RtoB(int r) int BtoR(int32 b) { - b &= 0x01fcL; // excluded R9 and R10 for m and g + b &= 0x11fcL; // excluded R9 and R10 for m and g, but not R12 if(b == 0) return 0; return bitno(b); @@ -1173,7 +1175,7 @@ BtoR(int32 b) * 18 F2 * 19 F3 * ... ... - * 23 F7 + * 31 F15 */ int32 FtoB(int f) @@ -1188,7 +1190,7 @@ int BtoF(int32 b) { - b &= 0xfc0000L; + b &= 0xfffc0000L; if(b == 0) return 0; return bitno(b) - 16; |