V2: Add support for a single-argument version of POPCNT for Maxwell (SM5)
Signed-off-by: Tobias Klausmann <[email protected]>
---
src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index c497335..19767b4 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -548,6 +548,10 @@ ConstantFolding::expr(Instruction *i,
}
break;
}
+ case OP_POPCNT: {
+ res.data.u32 = util_bitcount(a->data.u32 & b->data.u32); break;
+ break;
+ }
default:
return;
}
@@ -966,6 +970,17 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue
&imm0, int s)
i->subOp = 0;
break;
}
+ case OP_POPCNT: {
+ uint32_t res;
+ if (!i->srcExists(1)) {
+ res = util_bitcount(imm0.reg.data.u32);
+ i->setSrc(0, new_ImmediateValue(i->bb->getProgram(), res));
+ i->setSrc(1, NULL);
+ i->op = OP_MOV;
+ i->subOp = 0;
+ }
+ break;
+ }
default:
return;
}
--
1.8.4.5
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