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authorPauli Nieminen <suokkos@gmail.com>2010-02-02 20:50:22 +0200
committerPauli Nieminen <suokkos@gmail.com>2010-02-04 13:13:52 +0200
commitf1b07f0220bd71c86c977ba04cf20cf90d5e8958 (patch)
tree118cf3ef189f388ad9f8cd4764f13663ead683a6 /src/mesa/x86
parent5a743d9c513e6a36612872f270ea97b269451280 (diff)
swrast/sse: Fix _mesa_sse_transform_pointsX_3d_no_rot
PXOR user in code were causing the lowest SP float register to have NaN values which made all math operations in that slot fail. Correct istruction to clear float registers is XORPS which handles single precission floats correctly. Fixes progs/tests/fog in swrast SSE mode. Now the correct commit instead of 66d09e4a2a6b770ddb which is not even close of correct fix for the bug.
Diffstat (limited to 'src/mesa/x86')
-rw-r--r--src/mesa/x86/sse_xform2.S1
-rw-r--r--src/mesa/x86/sse_xform3.S1
2 files changed, 2 insertions, 0 deletions
diff --git a/src/mesa/x86/sse_xform2.S b/src/mesa/x86/sse_xform2.S
index 91b82e7297..a443dad35c 100644
--- a/src/mesa/x86/sse_xform2.S
+++ b/src/mesa/x86/sse_xform2.S
@@ -186,6 +186,7 @@ GLNAME(_mesa_sse_transform_points2_3d_no_rot):
MOV_L( REGOFF(V4F_START, EDI), EDI ) /* ptr to first dest vertex */
ADD_L( EDI, ECX ) /* count += dest ptr */
+ XORPS( XMM0, XMM0 ) /* clean the working register */
ALIGNTEXT32
MOVSS ( M(0), XMM1 ) /* - | - | - | m0 */
diff --git a/src/mesa/x86/sse_xform3.S b/src/mesa/x86/sse_xform3.S
index 1fc79ef21b..4bc22d8a54 100644
--- a/src/mesa/x86/sse_xform3.S
+++ b/src/mesa/x86/sse_xform3.S
@@ -198,6 +198,7 @@ GLNAME(_mesa_sse_transform_points3_3d_no_rot):
MOV_L( REGOFF(V4F_START, EDI), EDI ) /* ptr to first dest vertex */
ADD_L( EDI, ECX ) /* count += dest ptr */
+ XORPS( XMM0, XMM0 ) /* clean the working register */
ALIGNTEXT32
MOVSS ( M(0), XMM1 ) /* - | - | - | m0 */