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add patch: on freebsd, detect via sysctl whether OS supports SSE

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This commit is contained in:
Josh Coalson
2005-02-12 16:55:39 +00:00
parent 302ed8c3f3
commit 2f7293b09f
1 changed files with 29 additions and 15 deletions
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44
src/libFLAC/cpu.c
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@@ -38,19 +38,25 @@
#endif
#if defined FLAC__CPU_PPC
#if !defined FLAC__NO_ASM
#if defined FLAC__SYS_DARWIN
#include <sys/sysctl.h>
#include <mach/mach.h>
#include <mach/mach_host.h>
#include <mach/host_info.h>
#include <mach/machine.h>
#ifndef CPU_SUBTYPE_POWERPC_970
#define CPU_SUBTYPE_POWERPC_970 ((cpu_subtype_t) 100)
#endif
#else /* FLAC__SYS_DARWIN */
#include <signal.h>
#include <setjmp.h>
# if !defined FLAC__NO_ASM
# if defined FLAC__SYS_DARWIN
# include <sys/sysctl.h>
# include <mach/mach.h>
# include <mach/mach_host.h>
# include <mach/host_info.h>
# include <mach/machine.h>
# ifndef CPU_SUBTYPE_POWERPC_970
# define CPU_SUBTYPE_POWERPC_970 ((cpu_subtype_t) 100)
# endif
# else /* FLAC__SYS_DARWIN */
# ifdef __FreeBSD__
# include <sys/types.h>
# include <sys/sysctl.h>
# endif
# include <signal.h>
# include <setjmp.h>
static sigjmp_buf jmpbuf;
static volatile sig_atomic_t canjump = 0;
@@ -64,8 +70,8 @@ static void sigill_handler (int sig)
canjump = 0;
siglongjmp (jmpbuf, 1);
}
#endif /* FLAC__SYS_DARWIN */
#endif /* FLAC__NO_ASM */
# endif /* FLAC__SYS_DARWIN */
# endif /* FLAC__NO_ASM */
#endif /* FLAC__CPU_PPC */
const unsigned FLAC__CPUINFO_IA32_CPUID_CMOV = 0x00008000;
@@ -95,6 +101,14 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
#ifndef FLAC__SSE_OS
info->data.ia32.fxsr = info->data.ia32.sse = info->data.ia32.sse2 = false;
#elif defined(__FreeBSD__)
/* on FreeBSD we can double-check via sysctl whether the OS supports SSE */
{
int sse;
size_t len = sizeof(sse);
if (sysctlbyname("hw.instruction_sse", &sse, &len, NULL, 0) || !sse)
info->data.ia32.fxsr = info->data.ia32.sse = info->data.ia32.sse2 = false;
}
#endif
#ifdef FLAC__USE_3DNOW