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authorTobias Klausmann <tobias.johannes.klausmann@mni.thm.de>2014-06-04 00:35:50 +0200
committerIlia Mirkin <imirkin@alum.mit.edu>2014-06-06 00:05:11 -0400
commit4f4e9ba1661528bed8e956a4931ae154e6612824 (patch)
treebe68b2272ae51e60bd679a17fb3eccdc75e1847d /src/gallium
parentfdc1d96b0ff59e163ed9fe894a1e6d08d4204b94 (diff)
nvc0/ir: Handle OP_POPCNT when folding constant expressions
Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de> [imirkin: make sure to only fold 1-arg popcnt in opnd] Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index a91d698c5b2..b89da43136e 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -540,6 +540,9 @@ ConstantFolding::expr(Instruction *i,
}
break;
}
+ case OP_POPCNT:
+ res.data.u32 = util_bitcount(a->data.u32 & b->data.u32);
+ break;
default:
return;
}
@@ -957,6 +960,16 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
i->subOp = 0;
break;
}
+ case OP_POPCNT: {
+ // Only deal with 1-arg POPCNT here
+ if (i->srcExists(1))
+ break;
+ uint32_t res = util_bitcount(imm0.reg.data.u32);
+ i->setSrc(0, new_ImmediateValue(i->bb->getProgram(), res));
+ i->setSrc(1, NULL);
+ i->op = OP_MOV;
+ break;
+ }
default:
return;
}