diff options
Diffstat (limited to 'src/mesa/x86/common_x86.c')
| -rw-r--r-- | src/mesa/x86/common_x86.c | 83 |
1 files changed, 31 insertions, 52 deletions
diff --git a/src/mesa/x86/common_x86.c b/src/mesa/x86/common_x86.c index 53215479358..5efdb4f24a6 100644 --- a/src/mesa/x86/common_x86.c +++ b/src/mesa/x86/common_x86.c @@ -52,7 +52,10 @@ #include "common_x86_asm.h" -int _mesa_x86_cpu_features = 0; +/** Bitmask of X86_FEATURE_x bits */ +int _mesa_x86_cpu_features = 0x0; + + /* No reason for this to be public. */ @@ -73,9 +76,12 @@ extern GLuint _ASMAPI _mesa_x86_cpuid_edx(GLuint op); * kernels provide full SSE support on all processors that expose SSE via * the CPUID mechanism. */ + +/* These are assembly functions: */ extern void _mesa_test_os_sse_support( void ); extern void _mesa_test_os_sse_exception_support( void ); + #if defined(WIN32) #ifndef STATUS_FLOAT_MULTIPLE_TRAPS # define STATUS_FLOAT_MULTIPLE_TRAPS (0xC00002B5L) @@ -107,7 +113,11 @@ static LONG WINAPI ExceptionFilter(LPEXCEPTION_POINTERS exp) #endif /* WIN32 */ -static void check_os_sse_support( void ) +/** + * Check if SSE is supported. + * If not, turn off the X86_FEATURE_XMM flag in _mesa_x86_cpu_features. + */ +void _mesa_check_os_sse_support( void ) { #if defined(__FreeBSD__) { @@ -187,10 +197,26 @@ static void check_os_sse_support( void ) #endif /* USE_SSE_ASM */ -void _mesa_init_all_x86_transform_asm( void ) +/** + * Initialize the _mesa_x86_cpu_features bitfield. + * This is a no-op if called more than once. + */ +void +_mesa_get_x86_features(void) { + static int called = 0; + + if (called) + return; + + called = 1; + #ifdef USE_X86_ASM - _mesa_x86_cpu_features = 0; + _mesa_x86_cpu_features = 0x0; + + if (_mesa_getenv( "MESA_NO_ASM")) { + return; + } if (!_mesa_x86_has_cpuid()) { _mesa_debug(NULL, "CPUID not detected\n"); @@ -263,52 +289,5 @@ void _mesa_init_all_x86_transform_asm( void ) } } - - if ( _mesa_getenv( "MESA_NO_ASM" ) ) { - _mesa_x86_cpu_features = 0; - } - - if ( _mesa_x86_cpu_features ) { - _mesa_init_x86_transform_asm(); - } - -#ifdef USE_MMX_ASM - if ( cpu_has_mmx ) { - if ( _mesa_getenv( "MESA_NO_MMX" ) == 0 ) { - _mesa_debug(NULL, "MMX cpu detected.\n"); - } else { - _mesa_x86_cpu_features &= ~(X86_FEATURE_MMX); - } - } -#endif - -#ifdef USE_3DNOW_ASM - if ( cpu_has_3dnow ) { - if ( _mesa_getenv( "MESA_NO_3DNOW" ) == 0 ) { - _mesa_debug(NULL, "3DNow! cpu detected.\n"); - _mesa_init_3dnow_transform_asm(); - } else { - _mesa_x86_cpu_features &= ~(X86_FEATURE_3DNOW); - } - } -#endif - -#ifdef USE_SSE_ASM - if ( cpu_has_xmm ) { - if ( _mesa_getenv( "MESA_NO_SSE" ) == 0 ) { - _mesa_debug(NULL, "SSE cpu detected.\n"); - if ( _mesa_getenv( "MESA_FORCE_SSE" ) == 0 ) { - check_os_sse_support(); - } - if ( cpu_has_xmm ) { - _mesa_init_sse_transform_asm(); - } - } else { - _mesa_debug(NULL, "SSE cpu detected, but switched off by user.\n"); - _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM); - } - } -#endif -#endif +#endif /* USE_X86_ASM */ } - |