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nv50/ir: don't emit src2 in immediate form

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In the immediate form, src2 == dst, so it does not need to be emitted.
Otherwise it overlaps with the immediate value's low bits.

Fixes: 09ee907266 (nv50/ir: Fold IMM into MAD)
Cc: "10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
(cherry picked from commit c3215ef204)
This commit is contained in:
Ilia Mirkin 2015-07-02 00:13:36 -04:00 • committed by Emil Velikov
parent 6902a36d22
commit 1e8c43f4d0
1 changed files with 2 additions and 2 deletions
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4
src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nv50.cpp
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@ -550,7 +550,7 @@ CodeEmitterNV50::emitForm_MUL(const Instruction *i)
}
// usual immediate form
// - 1 to 3 sources where last is immediate (rir, gir)
// - 1 to 3 sources where second is immediate (rir, gir)
// - no address or predicate possible
void
CodeEmitterNV50::emitForm_IMM(const Instruction *i)
@ -566,7 +566,7 @@ CodeEmitterNV50::emitForm_IMM(const Instruction *i)
if (Target::operationSrcNr[i->op] > 1) {
setSrc(i, 0, 0);
setImmediate(i, 1);
setSrc(i, 2, 1);
// If there is another source, it has to be the same as the dest reg.
} else {
setImmediate(i, 0);
}