From: Eric Anholt <eric@anholt.net>
Date: Fri, 6 Jul 2012 21:51:44 +0000 (-0700)
Subject: i965/fs: Replace usage is_tex() with regs_written() checks.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fc01376c50c15938f3b78431023ca3281304663d;p=mesa.git

i965/fs: Replace usage is_tex() with regs_written() checks.

In these places, we care about any sort of send that hits more than one reg,
not just textures.  We don't yet have anything else returning more than one
reg, so there's no change.

v2: Use mlen instead of is_tex() for the is-it-a-send check.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c6056ad7916..de049d5b1bf 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1063,8 +1063,10 @@ fs_visitor::split_virtual_grfs()
    foreach_list(node, &this->instructions) {
       fs_inst *inst = (fs_inst *)node;
 
-      /* Texturing produces 4 contiguous registers, so no splitting. */
-      if (inst->is_tex()) {
+      /* If there's a SEND message that requires contiguous destination
+       * registers, no splitting is allowed.
+       */
+      if (inst->regs_written() > 1) {
 	 split_grf[inst->dst.reg] = false;
       }
    }
@@ -1400,7 +1402,7 @@ fs_visitor::propagate_constants()
 	 if (scan_inst->dst.file == GRF &&
 	     scan_inst->dst.reg == inst->dst.reg &&
 	     (scan_inst->dst.reg_offset == inst->dst.reg_offset ||
-	      scan_inst->is_tex())) {
+	      scan_inst->regs_written() > 1)) {
 	    break;
 	 }
       }
@@ -1602,14 +1604,14 @@ fs_visitor::register_coalesce()
 	 if (scan_inst->dst.file == GRF) {
 	    if (scan_inst->dst.reg == inst->dst.reg &&
 		(scan_inst->dst.reg_offset == inst->dst.reg_offset ||
-		 scan_inst->is_tex())) {
+		 scan_inst->regs_written() > 1)) {
 	       interfered = true;
 	       break;
 	    }
 	    if (inst->src[0].file == GRF &&
 		scan_inst->dst.reg == inst->src[0].reg &&
 		(scan_inst->dst.reg_offset == inst->src[0].reg_offset ||
-		 scan_inst->is_tex())) {
+		 scan_inst->regs_written() > 1)) {
 	       interfered = true;
 	       break;
 	    }
@@ -1729,10 +1731,8 @@ fs_visitor::compute_to_mrf()
 	     * into a compute-to-MRF.
 	     */
 
-	    if (scan_inst->is_tex()) {
-	       /* texturing writes several continuous regs, so we can't
-		* compute-to-mrf that.
-		*/
+            /* SENDs can only write to GRFs, so no compute-to-MRF. */
+	    if (scan_inst->mlen) {
 	       break;
 	    }