From: Eric Anholt <eric@anholt.net>
Date: Thu, 11 Mar 2010 02:48:23 +0000 (-0800)
Subject: i965: Clarify that DELTAXY always occurs for both X and Y.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f4f2737e8767d3808d876c3f7e65ca9f48faf624;p=mesa.git

i965: Clarify that DELTAXY always occurs for both X and Y.
---

diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index 438fcc7178d..2d1d011e553 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -125,23 +125,22 @@ void emit_delta_xy(struct brw_compile *p,
 {
    struct brw_reg r1 = brw_vec1_grf(1, 0);
 
+   if (mask == 0)
+      return;
+
+   assert(mask == WRITEMASK_XY);
+
    /* Calc delta X,Y by subtracting origin in r1 from the pixel
     * centers.
     */
-   if (mask & WRITEMASK_X) {
-      brw_ADD(p,
-	      dst[0],
-	      retype(arg0[0], BRW_REGISTER_TYPE_UW),
-	      negate(r1));
-   }
-
-   if (mask & WRITEMASK_Y) {
-      brw_ADD(p,
-	      dst[1],
-	      retype(arg0[1], BRW_REGISTER_TYPE_UW),
-	      negate(suboffset(r1,1)));
-
-   }
+   brw_ADD(p,
+	   dst[0],
+	   retype(arg0[0], BRW_REGISTER_TYPE_UW),
+	   negate(r1));
+   brw_ADD(p,
+	   dst[1],
+	   retype(arg0[1], BRW_REGISTER_TYPE_UW),
+	   negate(suboffset(r1,1)));
 }
 
 void emit_wpos_xy(struct brw_wm_compile *c,