Signed-off-by: Tobias Klausmann <tobias.johannes.klausm...@mni.thm.de>
---
src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index 68b9a6d..a56756c 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -556,6 +556,20 @@ ConstantFolding::expr(Instruction *i,
}
break;
}
+ case OP_BFIND: {
+ int shift = 0;
+ if (i->subOp == NV50_IR_SUBOP_BFIND_SAMT)
+ shift = 32 - (b->data.u32 & 0xff);
+ switch (i->dType) {
+ case TYPE_S32:
+ res.data.s32 = util_last_bit_signed(a->data.s32 >> shift)- 1; break;
+ case TYPE_U32:
+ res.data.u32 = util_last_bit(a->data.u32 >> shift) -1; break;
+ default:
+ return;
+ }
+ break;
+ }
default:
return;
}
--
1.8.4.5
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