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nv50/ir/opt: optimize u32 MOD by power of 2 into AND

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This commit is contained in:
Christoph Bumiller
2012-01-07 18:42:13 +01:00
parent 6ab6110133
commit ae828413c4
1 changed files with 8 additions and 0 deletions
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8
src/gallium/drivers/nv50/codegen/nv50_ir_peephole.cpp
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@@ -698,6 +698,14 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue *src, int s)
} }
break; break;
case OP_MOD:
if (i->sType == TYPE_U32 && imm.isPow2()) {
bld.setPosition(i, false);
i->op = OP_AND;
i->setSrc(1, bld.loadImm(NULL, imm.reg.data.u32 - 1));
}
break;
case OP_SET: // TODO: SET_AND,OR,XOR case OP_SET: // TODO: SET_AND,OR,XOR
{ {
CmpInstruction *si = findOriginForTestWithZero(i->getSrc(t)); CmpInstruction *si = findOriginForTestWithZero(i->getSrc(t));