From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Tue, 22 Sep 2015 23:57:03 +0000 (-0700)
Subject: prog_to_nir: Use nir_op_dph
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e7496fed2a2428b704b8aeab5f42df8e6a2f7ae1;p=mesa.git

prog_to_nir: Use nir_op_dph

Shader-db results on HSW:

   instructions in affected programs:     72 -> 56 (-22.22%)

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/program/prog_to_nir.c b/src/mesa/program/prog_to_nir.c
index ec61100356a..1bd735a47bb 100644
--- a/src/mesa/program/prog_to_nir.c
+++ b/src/mesa/program/prog_to_nir.c
@@ -527,8 +527,7 @@ ptn_dp4(nir_builder *b, nir_alu_dest dest, nir_ssa_def **src)
 static void
 ptn_dph(nir_builder *b, nir_alu_dest dest, nir_ssa_def **src)
 {
-   nir_ssa_def *dp3 = nir_fdot3(b, src[0], src[1]);
-   ptn_move_dest(b, dest, nir_fadd(b, dp3, ptn_channel(b, src[1], W)));
+   ptn_move_dest(b, dest, nir_fdph(b, src[0], src[1]));
 }
 
 static void