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Fixing CNTLZ.

This commit is contained in:
Ben Vanik 2013-12-08 16:01:11 -08:00
parent 60015afdc4
commit 65a36fd69c
1 changed files with 5 additions and 5 deletions
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10
src/alloy/backend/ivm/ivm_intcode.cc
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@ -2779,9 +2779,9 @@ uint32_t IntCode_CNTLZ_I8(IntCodeState& ics, const IntCode* i) {
// CHECK // CHECK
XEASSERTALWAYS(); XEASSERTALWAYS();
DWORD index; DWORD index;
DWORD mask = ics.rf[i->src1_reg].i16; DWORD mask = ics.rf[i->src1_reg].i8;
BOOLEAN is_nonzero = _BitScanReverse(&index, mask); BOOLEAN is_nonzero = _BitScanReverse(&index, mask);
ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)(index - 24) ^ 0x7 : 0x7; ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)(index - 24) ^ 0x7 : 8;
return IA_NEXT; return IA_NEXT;
} }
uint32_t IntCode_CNTLZ_I16(IntCodeState& ics, const IntCode* i) { uint32_t IntCode_CNTLZ_I16(IntCodeState& ics, const IntCode* i) {
@ -2790,21 +2790,21 @@ uint32_t IntCode_CNTLZ_I16(IntCodeState& ics, const IntCode* i) {
DWORD index; DWORD index;
DWORD mask = ics.rf[i->src1_reg].i16; DWORD mask = ics.rf[i->src1_reg].i16;
BOOLEAN is_nonzero = _BitScanReverse(&index, mask); BOOLEAN is_nonzero = _BitScanReverse(&index, mask);
ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)(index - 16) ^ 0xF : 0xF; ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)(index - 16) ^ 0xF : 16;
return IA_NEXT; return IA_NEXT;
} }
uint32_t IntCode_CNTLZ_I32(IntCodeState& ics, const IntCode* i) { uint32_t IntCode_CNTLZ_I32(IntCodeState& ics, const IntCode* i) {
DWORD index; DWORD index;
DWORD mask = ics.rf[i->src1_reg].i32; DWORD mask = ics.rf[i->src1_reg].i32;
BOOLEAN is_nonzero = _BitScanReverse(&index, mask); BOOLEAN is_nonzero = _BitScanReverse(&index, mask);
ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)index ^ 0x1F : 0x1F; ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)index ^ 0x1F : 32;
return IA_NEXT; return IA_NEXT;
} }
uint32_t IntCode_CNTLZ_I64(IntCodeState& ics, const IntCode* i) { uint32_t IntCode_CNTLZ_I64(IntCodeState& ics, const IntCode* i) {
DWORD index; DWORD index;
DWORD64 mask = ics.rf[i->src1_reg].i64; DWORD64 mask = ics.rf[i->src1_reg].i64;
BOOLEAN is_nonzero = _BitScanReverse64(&index, mask); BOOLEAN is_nonzero = _BitScanReverse64(&index, mask);
ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)index ^ 0x3F : 0x3F; ics.rf[i->dest_reg].i8 = is_nonzero ? (int8_t)index ^ 0x3F : 64;
return IA_NEXT; return IA_NEXT;
} }
int Translate_CNTLZ(TranslationContext& ctx, Instr* i) { int Translate_CNTLZ(TranslationContext& ctx, Instr* i) {