From: Eric Anholt <eric@anholt.net>
Date: Fri, 10 Feb 2017 20:00:32 +0000 (-0800)
Subject: vc4: Use accurate 1/w in coordinate shader as well as vert shader.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ce538a443dfd1fc860c499e06704dab9324fff6e;p=mesa.git

vc4: Use accurate 1/w in coordinate shader as well as vert shader.

We probably shouldn't be emitting different scaled viewport coordinates
between vertex and coord.
---

diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index 4865bcbd283..536efc4789d 100644
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -1511,7 +1511,7 @@ emit_vert_end(struct vc4_compile *c,
 static void
 emit_coord_end(struct vc4_compile *c)
 {
-        struct qreg rcp_w = qir_RCP(c, c->outputs[c->output_position_index + 3]);
+        struct qreg rcp_w = ntq_rcp(c, c->outputs[c->output_position_index + 3]);
 
         emit_stub_vpm_read(c);