On 04/20/2016 07:47 PM, Ilia Mirkin wrote:
Presumably you'd want to touch up the non-limm side of this as well?
Although TBH, I can't really think of a time when it'd matter. I think
you're pretty much guaranteed to have stype == dtype for mul's. Maybe
I'm wrong?
Well, the non-limm part is wrong because 0xc1c won't be used anymore
with the previous patch, as emitForm_21() uses opc1 when src(1) is an
immediate. The different flags was only useful for 0xc1c but now they
are useless, because 0x21c is actually:
/*0000*/ @P0 FMUL32I.FTZ R0.CC, R0, -0; /* 0x21c0000000000002 */
I was thinking to make a new patch to remove them, but this one doesn't
need to be backported.
I think we are pretty guaranteed that stype == dtype, but does this is
correct all the time? Not sure. If you look at NVC0::emitUMUL() you will
see that the signed expressions for dst/src are separated.
-ilia
On Wed, Apr 20, 2016 at 1:06 PM, Samuel Pitoiset
<samuel.pitoi...@gmail.com> wrote:
Forcing the destination type to be signed when the source is signed
is not totally correct.
Signed-off-by: Samuel Pitoiset <samuel.pitoi...@gmail.com>
Cc: "11.1 11.2" <mesa-sta...@lists.freedesktop.org>
---
src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp
index f69567a..90b90bc 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp
@@ -617,8 +617,10 @@ CodeEmitterGK110::emitIMUL(const Instruction *i)
if (i->subOp == NV50_IR_SUBOP_MUL_HIGH)
code[1] |= 1 << 24;
+ if (i->dType == TYPE_S32)
+ code[1] |= 1 << 25;
if (i->sType == TYPE_S32)
- code[1] |= 3 << 25;
+ code[1] |= 1 << 26;
} else {
emitForm_21(i, 0x21c, 0xc1c);
--
2.8.0
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