From: Michal Krol <michal@tungstengraphics.com>
Date: Mon, 2 Jun 2008 09:59:04 +0000 (+0200)
Subject: tgsi: Add assertions to the new rule that when an extended swizzle
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2c7ae3371b6058988f7f10bf031d630b649f3831;p=mesa.git

tgsi: Add assertions to the new rule that when an extended swizzle
is used, the simple swizzle must be set to identity.
---

diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_build.c b/src/gallium/auxiliary/tgsi/util/tgsi_build.c
index 63cc27becc0..18e44b38c24 100644
--- a/src/gallium/auxiliary/tgsi/util/tgsi_build.c
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_build.c
@@ -628,6 +628,14 @@ tgsi_build_full_instruction(
             tgsi_default_src_register_ext_swz() ) ) {
          struct tgsi_src_register_ext_swz *src_register_ext_swz;
 
+         /* Use of the extended swizzle requires the simple swizzle to be identity.
+          */
+         assert( reg->SrcRegister.SwizzleX == TGSI_SWIZZLE_X );
+         assert( reg->SrcRegister.SwizzleY == TGSI_SWIZZLE_Y );
+         assert( reg->SrcRegister.SwizzleZ == TGSI_SWIZZLE_Z );
+         assert( reg->SrcRegister.SwizzleW == TGSI_SWIZZLE_W );
+         assert( reg->SrcRegister.Negate == FALSE );
+
          if( maxsize <= size )
             return 0;
          src_register_ext_swz =