From: Eric Anholt <eric@anholt.net>
Date: Fri, 19 Mar 2010 18:44:43 +0000 (-0700)
Subject: i965: Optimize OPCODE_CMP by using BRW_SEL to choose results.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8a998342c6bf591f1969b432bdda1732d480ee56;p=mesa.git

i965: Optimize OPCODE_CMP by using BRW_SEL to choose results.

Tested with piglit glsl-fs-sqrt-branch, fp-cmp.vpfp.
---

diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index 1869fd06d5a..5abc0672f3f 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -620,14 +620,10 @@ void emit_cmp(struct brw_compile *p,
 
    for (i = 0; i < 4; i++) {
       if (mask & (1<<i)) {	
-	 brw_set_saturate(p, (mask & SATURATE) ? 1 : 0);
-	 brw_MOV(p, dst[i], arg2[i]);
-	 brw_set_saturate(p, 0);
-
 	 brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0[i], brw_imm_f(0));
 
 	 brw_set_saturate(p, (mask & SATURATE) ? 1 : 0);
-	 brw_MOV(p, dst[i], arg1[i]);
+	 brw_SEL(p, dst[i], arg1[i], arg2[i]);
 	 brw_set_saturate(p, 0);
 	 brw_set_predicate_control_flag_value(p, 0xff);
       }