Use 3Dnow! x86-64 routines only on processors that support 3Dnow!
Added an x86-64 CPUID function and use it to detect 3Dnow! If 3Dnow!
is available, use _mesa_3dnow_transform_points4_3d_no_rot,
_mesa_3dnow_transform_points4_perspective,
_mesa_3dnow_transform_points4_2d_no_rot, and _mesa_3dnow_transform_points4_2d.
This fixes long standing bug #8724.
diff --git a/src/mesa/x86-64/x86-64.c b/src/mesa/x86-64/x86-64.c
index 9ec43c8..96f8da8 100644
--- a/src/mesa/x86-64/x86-64.c
+++ b/src/mesa/x86-64/x86-64.c
@@ -41,7 +41,10 @@
#include "math/m_debug.h"
#endif
+extern void _mesa_x86_64_cpuid(unsigned int *regs);
+
DECLARE_XFORM_GROUP( x86_64, 4 )
+DECLARE_XFORM_GROUP( 3dnow, 4 )
#else
/* just to silence warning below */
@@ -81,6 +84,7 @@
void _mesa_init_all_x86_64_transform_asm(void)
{
#ifdef USE_X86_64_ASM
+ unsigned int regs[4];
if ( _mesa_getenv( "MESA_NO_ASM" ) ) {
return;
@@ -88,24 +92,32 @@
message("Initializing x86-64 optimizations\n");
- ASSIGN_XFORM_GROUP( x86_64, 4 );
- /*
_mesa_transform_tab[4][MATRIX_GENERAL] =
_mesa_x86_64_transform_points4_general;
_mesa_transform_tab[4][MATRIX_IDENTITY] =
_mesa_x86_64_transform_points4_identity;
_mesa_transform_tab[4][MATRIX_3D] =
_mesa_x86_64_transform_points4_3d;
- _mesa_transform_tab[4][MATRIX_3D_NO_ROT] =
- _mesa_x86_64_transform_points4_3d_no_rot;
- _mesa_transform_tab[4][MATRIX_PERSPECTIVE] =
- _mesa_x86_64_transform_points4_perspective;
- _mesa_transform_tab[4][MATRIX_2D_NO_ROT] =
- _mesa_x86_64_transform_points4_2d_no_rot;
- _mesa_transform_tab[4][MATRIX_2D] =
- _mesa_x86_64_transform_points4_2d;
- */
+
+ regs[0] = 0x80000001;
+ regs[1] = 0x00000000;
+ regs[2] = 0x00000000;
+ regs[3] = 0x00000000;
+ _mesa_x86_64_cpuid(regs);
+ if (regs[3] & (1U << 31)) {
+ message("3Dnow! detected\n");
+ _mesa_transform_tab[4][MATRIX_3D_NO_ROT] =
+ _mesa_3dnow_transform_points4_3d_no_rot;
+ _mesa_transform_tab[4][MATRIX_PERSPECTIVE] =
+ _mesa_3dnow_transform_points4_perspective;
+ _mesa_transform_tab[4][MATRIX_2D_NO_ROT] =
+ _mesa_3dnow_transform_points4_2d_no_rot;
+ _mesa_transform_tab[4][MATRIX_2D] =
+ _mesa_3dnow_transform_points4_2d;
+
+ }
+
#ifdef DEBUG_MATH
_math_test_all_transform_functions("x86_64");
diff --git a/src/mesa/x86-64/xform4.S b/src/mesa/x86-64/xform4.S
index 3f9c9d5..8059691 100644
--- a/src/mesa/x86-64/xform4.S
+++ b/src/mesa/x86-64/xform4.S
@@ -29,7 +29,22 @@
.text
.align 16
+.globl _mesa_x86_64_cpuid
+_mesa_x86_64_cpuid:
+ pushq %rbx
+ movl (%rdi), %eax
+ movl 8(%rdi), %ecx
+ cpuid
+
+ movl %ebx, 4(%rdi)
+ movl %eax, (%rdi)
+ movl %ecx, 8(%rdi)
+ movl %edx, 12(%rdi)
+ popq %rbx
+ ret
+
+.align 16
.globl _mesa_x86_64_transform_points4_general
_mesa_x86_64_transform_points4_general:
/*
@@ -204,8 +219,8 @@
.align 16
-.globl _mesa_x86_64_transform_points4_3d_no_rot
-_mesa_x86_64_transform_points4_3d_no_rot:
+.globl _mesa_3dnow_transform_points4_3d_no_rot
+_mesa_3dnow_transform_points4_3d_no_rot:
movl V4F_COUNT(%rdx), %ecx /* count */
movzx V4F_STRIDE(%rdx), %eax /* stride */
@@ -268,8 +283,8 @@
.align 16
-.globl _mesa_x86_64_transform_points4_perspective
-_mesa_x86_64_transform_points4_perspective:
+.globl _mesa_3dnow_transform_points4_perspective
+_mesa_3dnow_transform_points4_perspective:
movl V4F_COUNT(%rdx), %ecx /* count */
movzx V4F_STRIDE(%rdx), %eax /* stride */
@@ -334,8 +349,8 @@
ret
.align 16
-.globl _mesa_x86_64_transform_points4_2d_no_rot
-_mesa_x86_64_transform_points4_2d_no_rot:
+.globl _mesa_3dnow_transform_points4_2d_no_rot
+_mesa_3dnow_transform_points4_2d_no_rot:
movl V4F_COUNT(%rdx), %ecx /* count */
movzx V4F_STRIDE(%rdx), %eax /* stride */
@@ -389,8 +404,8 @@
.align 16
-.globl _mesa_x86_64_transform_points4_2d
-_mesa_x86_64_transform_points4_2d:
+.globl _mesa_3dnow_transform_points4_2d
+_mesa_3dnow_transform_points4_2d:
movl V4F_COUNT(%rdx), %ecx /* count */
movzx V4F_STRIDE(%rdx), %eax /* stride */