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Runtime SSE detection for NEtBSD, patch by Nick Hudson <skrll at netbsd.org> 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8402 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
atmos4 2002-12-07 21:04:54 +00:00
parent 7caded971d
commit bae716c763
1 changed files with 45 additions and 1 deletions
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46
cpudetect.c
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@ -14,6 +14,11 @@ CpuCaps gCpuCaps;
#include <stdio.h>
#include <string.h>
#ifdef __NetBSD__
#include <sys/param.h>
#include <setjmp.h>
#endif
#ifdef __FreeBSD__
#include <sys/types.h>
#include <sys/sysctl.h>
@ -147,7 +152,7 @@ void GetCpuCaps( CpuCaps *caps)
#endif
/* FIXME: Does SSE2 need more OS support, too? */
#if defined(__linux__) || defined(__FreeBSD__)
#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
if (caps->hasSSE)
check_os_katmai_support();
if (!caps->hasSSE)
@ -237,6 +242,15 @@ char *GetCpuFriendlyName(unsigned int regs[], unsigned int regs2[]){
#undef CPUID_STEPPING
#ifdef __NetBSD__
jmp_buf sseCheckEnv;
void sseCheckHandler(int i)
{
longjmp(sseCheckEnv, 1);
}
#endif
#if defined(__linux__) && defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC)
static void sigill_handler_sse( int signal, struct sigcontext sc )
{
@ -293,6 +307,36 @@ static void check_os_katmai_support( void )
if (ret || !has_sse)
gCpuCaps.hasSSE=0;
#elif defined(__NetBSD__)
#if __NetBSD_Version__ >= 105260000
if ( gCpuCaps.hasSSE ) {
void (*oldHandler)(int);
mp_msg(MSGT_CPUDETECT,MSGL_V, "Testing OS support for SSE... " );
oldHandler = signal(SIGILL, sseCheckHandler);
if (setjmp(sseCheckEnv)) {
gCpuCaps.hasSSE = 0;
} else {
__asm__ __volatile__ (
"subl $0x10, %esp \n"
"movups %xmm0, (%esp) \n"
"emms \n"
"addl $0x10, %esp \n"
);
}
signal(SIGILL, oldHandler);
if ( gCpuCaps.hasSSE ) {
mp_msg(MSGT_CPUDETECT,MSGL_V, "no!\n" );
} else {
mp_msg(MSGT_CPUDETECT,MSGL_V, "yes!\n" );
}
}
#else
gCpuCaps.hasSSE = 0
mp_msg(MSGT_CPUDETECT,MSGL_WARN, "No OS support for SSE, disabling to be safe.\n" );
#endif
#elif defined(__linux__)
#if defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC)
struct sigaction saved_sigill;