diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/x86/common_x86.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/src/mesa/x86/common_x86.c b/src/mesa/x86/common_x86.c index 90fa7e48ff..2d830b4b0f 100644 --- a/src/mesa/x86/common_x86.c +++ b/src/mesa/x86/common_x86.c @@ -22,13 +22,16 @@ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ -/* +/** + * \file common_x86.c + * * Check CPU capabilities & initialize optimized funtions for this particular * processor. * - * Written by Holger Waechtler <holger@akaflieg.extern.tu-berlin.de> - * Changed by Andre Werthmann <wertmann@cs.uni-potsdam.de> for using the - * new SSE functions. + * Changed by Andre Werthmann for using the new SSE functions. + * + * \author Holger Waechtler <holger@akaflieg.extern.tu-berlin.de> + * \author Andre Werthmann <wertmann@cs.uni-potsdam.de> */ /* XXX these includes should probably go into imports.h or glheader.h */ @@ -87,12 +90,19 @@ static void message( const char *msg ) * loop in the signal delivery from the kernel as we can't interact with * the SIMD FPU state to clear the exception bits. Either way, this is * not good. + * + * However, I have been told by Alan Cox that all 2.4 (and later) Linux + * kernels provide full SSE support on all processors that expose SSE via + * the CPUID mechanism. It just so happens that this is the exact set of + * kernels supported DRI. Therefore, when building for DRI the funky SSE + * exception test is omitted. */ extern void _mesa_test_os_sse_support( void ); extern void _mesa_test_os_sse_exception_support( void ); -#if defined(__linux__) && defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC) +#if defined(__linux__) && defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC) \ + && !defined(DRI_NEW_INTERFACE_ONLY) static void sigill_handler( int signal, struct sigcontext sc ) { message( "SIGILL, " ); @@ -142,7 +152,7 @@ static void sigfpe_handler( int signal, struct sigcontext sc ) */ static void check_os_sse_support( void ) { -#if defined(__linux__) +#if defined(__linux__) && !defined(DRI_NEW_INTERFACE_ONLY) #if defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC) struct sigaction saved_sigill; struct sigaction saved_sigfpe; |