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-rw-r--r--src/gallium/drivers/nvc0/nvc0_pc_emit.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/gallium/drivers/nvc0/nvc0_pc_emit.c b/src/gallium/drivers/nvc0/nvc0_pc_emit.c
index b2a80566a02..c10f920e6f1 100644
--- a/src/gallium/drivers/nvc0/nvc0_pc_emit.c
+++ b/src/gallium/drivers/nvc0/nvc0_pc_emit.c
@@ -479,6 +479,7 @@ emit_ddx(struct nv_pc *pc, struct nv_instruction *i)
{
i->quadop = 0x99;
i->lanes = 4;
+ i->src[1] = i->src[0];
emit_quadop(pc, i);
}
@@ -487,6 +488,7 @@ emit_ddy(struct nv_pc *pc, struct nv_instruction *i)
{
i->quadop = 0xa5;
i->lanes = 5;
+ i->src[1] = i->src[0];
emit_quadop(pc, i);
}