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merged patches from Chris Csanady and John Steele Scott, better checking for altivec and ppc64 on ppc

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This commit is contained in:
Josh Coalson 2005-01-21 01:53:02 +00:00
parent fd218cf3cf
commit 663c599b0a
3 changed files with 84 additions and 10 deletions
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13
src/libFLAC/Makefile.am
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@ -29,10 +29,21 @@
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lib_LTLIBRARIES = libFLAC.la
DEBUGCFLAGS =
CPUCFLAGS =
if DEBUG
DEBUGCFLAGS = -DFLAC__OVERFLOW_DETECT
endif
CFLAGS = @CFLAGS@ $(DEBUGCFLAGS)
if FLaC__CPU_PPC
# The -force_cpusubtype_ALL is needed to insert a ppc64 instruction
# into cpu.c with an asm().
if FLaC__SYS_DARWIN
CPUCFLAGS= -faltivec -force_cpusubtype_ALL
else
CPUCFLAGS= -maltivec -mabi=altivec -force_cpusubtype_ALL
endif
endif
CFLAGS = @CFLAGS@ $(DEBUGCFLAGS) $(CPUCFLAGS)
if FLaC__NO_ASM
else

80
src/libFLAC/cpu.c
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@ -30,8 +30,8 @@
*/
#include "private/cpu.h"
#include<stdlib.h>
#include<stdio.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef HAVE_CONFIG_H
#include <config.h>
@ -39,9 +39,32 @@
#if defined FLAC__CPU_PPC
#if !defined FLAC__NO_ASM
#if defined __APPLE__ && defined __MACH__
#if defined FLAC__SYS_DARWIN
#include <sys/sysctl.h>
#endif /* __APPLE__ && __MACH__ */
#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>
static sigjmp_buf jmpbuf;
static volatile sig_atomic_t canjump = 0;
static void sigill_handler (int sig)
{
if (!canjump) {
signal (sig, SIG_DFL);
raise (sig);
}
canjump = 0;
siglongjmp (jmpbuf, 1);
}
#endif /* FLAC__SYS_DARWIN */
#endif /* FLAC__NO_ASM */
#endif /* FLAC__CPU_PPC */
@ -91,7 +114,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
#if !defined FLAC__NO_ASM
info->use_asm = true;
#ifdef FLAC__USE_ALTIVEC
#if defined __APPLE__ && defined __MACH__
#if defined FLAC__SYS_DARWIN
{
int selectors[2] = { CTL_HW, HW_VECTORUNIT };
int result = 0;
@ -100,12 +123,51 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
info->data.ppc.altivec = error==0 ? result!=0 : 0;
}
#else /* __APPLE__ && __MACH__ */
/* don't know of any other thread-safe way to check */
info->data.ppc.altivec = 0;
#endif /* __APPLE__ && __MACH__ */
{
host_basic_info_data_t hostInfo;
mach_msg_type_number_t infoCount;
infoCount = HOST_BASIC_INFO_COUNT;
host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo, &infoCount);
info->data.ppc.ppc64 = (hostInfo.cpu_type == CPU_TYPE_POWERPC) && (hostInfo.cpu_subtype == CPU_SUBTYPE_POWERPC_970);
}
#else /* FLAC__SYS_DARWIN */
{
/* no Darwin, do it the brute-force way */
/* this is borrowed from MPlayer from the libmpeg2 library */
info->data.ppc.altivec = 0;
info->data.ppc.ppc64 = 0;
signal (SIGILL, sigill_handler);
if (!sigsetjmp (jmpbuf, 1)) {
canjump = 1;
asm volatile (
"mtspr 256, %0\n\t"
"vand %%v0, %%v0, %%v0"
:
: "r" (-1)
);
info->data.ppc.altivec = 1;
}
canjump = 0;
if (!sigsetjmp (jmpbuf, 1)) {
int x = 0;
canjump = 1;
/* PPC64 hardware implements the cntlzd instruction */
asm volatile ("cntlzd %0, %1" : "=r" (x) : "r" (x) );
info->data.ppc.ppc64 = 1;
}
signal (SIGILL, SIG_DFL);
}
#endif /* FLAC__SYS_DARWIN */
#else /* FLAC__USE_ALTIVEC */
info->data.ppc.altivec = 0;
info->data.ppc.ppc64 = 0;
#endif /* FLAC__USE_ALTIVEC */
#else /* FLAC__NO_ASM */
info->use_asm = false;

1
src/libFLAC/include/private/cpu.h
View File

@ -57,6 +57,7 @@ typedef struct {
typedef struct {
FLAC__bool altivec;
FLAC__bool ppc64;
} FLAC__CPUInfo_PPC;
extern const unsigned FLAC__CPUINFO_IA32_CPUID_CMOV;