From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Thu, 15 Sep 2016 16:11:56 +0000 (+0200)
Subject: nvc0/ir: fix subops for IMAD
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=50baaf6bc624e78f6d92f2316a370e11d4c4d882;p=mesa.git

nvc0/ir: fix subops for IMAD

Offset was wrong, it's at bit 8, not 4. Also, uses subr instead
of sub when src2 has neg. Similar to GK110 now.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org
---

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
index d83028cd7f7..d8ca6ab07ad 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
@@ -735,9 +735,15 @@ CodeEmitterNVC0::emitUADD(const Instruction *i)
 void
 CodeEmitterNVC0::emitIMAD(const Instruction *i)
 {
+   uint8_t addOp =
+      (i->src(2).mod.neg() << 1) | (i->src(0).mod.neg() ^ i->src(1).mod.neg());
+
    assert(i->encSize == 8);
    emitForm_A(i, HEX64(20000000, 00000003));
 
+   assert(addOp != 3);
+   code[0] |= addOp << 8;
+
    if (isSignedType(i->dType))
       code[0] |= 1 << 7;
    if (isSignedType(i->sType))
@@ -748,10 +754,6 @@ CodeEmitterNVC0::emitIMAD(const Instruction *i)
    if (i->flagsDef >= 0) code[1] |= 1 << 16;
    if (i->flagsSrc >= 0) code[1] |= 1 << 23;
 
-   if (i->src(2).mod.neg()) code[0] |= 0x10;
-   if (i->src(1).mod.neg() ^
-       i->src(0).mod.neg()) code[0] |= 0x20;
-
    if (i->subOp == NV50_IR_SUBOP_MUL_HIGH)
       code[0] |= 1 << 6;
 }