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.
Signed-off-by: Pauli Nieminen <suok...@gmail.com>
---
src/mesa/x86/sse_xform2.S | 2 +-
src/mesa/x86/sse_xform3.S | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/mesa/x86/sse_xform2.S b/src/mesa/x86/sse_xform2.S
index b490d4c..a443dad 100644
--- a/src/mesa/x86/sse_xform2.S
+++ b/src/mesa/x86/sse_xform2.S
@@ -186,7 +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 */
- PXOR( XMM0, XMM0 )
+ 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 8a79eed..4bc22d8 100644
--- a/src/mesa/x86/sse_xform3.S
+++ b/src/mesa/x86/sse_xform3.S
@@ -198,7 +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 */
- PXOR( XMM0, XMM0 )
+ XORPS( XMM0, XMM0 ) /* clean the working register
*/
ALIGNTEXT32
MOVSS ( M(0), XMM1 ) /* - | - | - | m0 */
--
1.6.3.3
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