From: Eric Anholt <eric@anholt.net>
Date: Tue, 16 Jun 2015 00:47:12 +0000 (-0700)
Subject: vc4: Swap around which src we spill to ra31/rb31.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d4d27361499cac73da4716b571519ecb71cef551;p=mesa.git

vc4: Swap around which src we spill to ra31/rb31.

I wanted to assert that src1 came from a non-unspilled register in shader
validation, and this easily gets us that.  And, as a bonus:

total instructions in shared programs: 93347 -> 92723 (-0.67%)
instructions in affected programs:     60524 -> 59900 (-1.03%)
---

diff --git a/src/gallium/drivers/vc4/vc4_qpu_emit.c b/src/gallium/drivers/vc4/vc4_qpu_emit.c
index 577eb9200f4..99afe4b8798 100644
--- a/src/gallium/drivers/vc4/vc4_qpu_emit.c
+++ b/src/gallium/drivers/vc4/vc4_qpu_emit.c
@@ -117,11 +117,11 @@ fixup_raddr_conflict(struct vc4_compile *c,
                 return;
 
         if (mux0 == QPU_MUX_A) {
-                queue(c, qpu_a_MOV(qpu_rb(31), *src1));
-                *src1 = qpu_rb(31);
+                queue(c, qpu_a_MOV(qpu_rb(31), *src0));
+                *src0 = qpu_rb(31);
         } else {
-                queue(c, qpu_a_MOV(qpu_ra(31), *src1));
-                *src1 = qpu_ra(31);
+                queue(c, qpu_a_MOV(qpu_ra(31), *src0));
+                *src0 = qpu_ra(31);
         }
 }