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test for X86_FXSR_MAGIC to be sure we have the _fpstate.magic field, needed for SSE signal handler

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This commit is contained in:
Brian Paul 2001-06-06 18:12:35 +00:00
parent 6f365c21d7
commit a5455bb374
1 changed files with 5 additions and 5 deletions
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10
src/mesa/x86/common_x86.c
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@ -1,4 +1,4 @@
/* $Id: common_x86.c,v 1.15 2001/03/29 06:46:16 gareth Exp $ */
/* $Id: common_x86.c,v 1.16 2001/06/06 18:12:35 brianp Exp $ */
/*
* Mesa 3-D graphics library
@ -87,7 +87,7 @@ static void message( const char *msg )
extern void _mesa_test_os_sse_support( void );
extern void _mesa_test_os_sse_exception_support( void );
#if defined(__linux__) && defined(_POSIX_SOURCE)
#if defined(__linux__) && defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC)
static void sigill_handler( int signal, struct sigcontext sc )
{
message( "SIGILL, " );
@ -125,7 +125,7 @@ static void sigfpe_handler( int signal, struct sigcontext sc )
_mesa_problem( NULL, "SSE enabling test failed badly!" );
}
}
#endif /* __linux__ && _POSIX_SOURCE */
#endif /* __linux__ && _POSIX_SOURCE && X86_FXSR_MAGIC */
/* If we're running on a processor that can do SSE, let's see if we
* are allowed to or not. This will catch 2.4.0 or later kernels that
@ -138,7 +138,7 @@ static void sigfpe_handler( int signal, struct sigcontext sc )
static void check_os_sse_support( void )
{
#if defined(__linux__)
#if defined(_POSIX_SOURCE)
#if defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC)
struct sigaction saved_sigill;
struct sigaction saved_sigfpe;
@ -212,7 +212,7 @@ static void check_os_sse_support( void )
*/
message( "Cannot test OS support for SSE, disabling to be safe.\n" );
_mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
#endif /* _POSIX_SOURCE */
#endif /* _POSIX_SOURCE && X86_FXSR_MAGIC */
#else
/* Do nothing on non-Linux platforms for now.
*/