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nvc0/ir: Handle reverse subop for OP_EXTBF when folding constant expressions

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Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Tobias Klausmann 2014-06-04 00:35:48 +02:00 • committed by Ilia Mirkin
parent 3164bfc734
commit 4674343e8f
1 changed files with 6 additions and 2 deletions
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8
src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
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@ -528,9 +528,13 @@ ConstantFolding::expr(Instruction *i,
rshift = 32 - width;
lshift = 32 - width - offset;
}
if (i->subOp == NV50_IR_SUBOP_EXTBF_REV)
res.data.u32 = util_bitreverse(a->data.u32);
else
res.data.u32 = a->data.u32;
switch (i->dType) {
case TYPE_S32: res.data.s32 = (a->data.s32 << lshift) >> rshift; break;
case TYPE_U32: res.data.u32 = (a->data.u32 << lshift) >> rshift; break;
case TYPE_S32: res.data.s32 = (res.data.s32 << lshift) >> rshift; break;
case TYPE_U32: res.data.u32 = (res.data.u32 << lshift) >> rshift; break;
default:
return;
}