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Refactoring and simplifying of CPU detection.

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Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo
2014-10-04 09:05:08 +10:00
parent 7cb032c322
commit 35c14b10a4
3 changed files with 48 additions and 52 deletions
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73
src/libFLAC/cpu.c
View File

@@ -36,14 +36,22 @@
#include "private/cpu.h"
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#ifdef DEBUG
# include <stdio.h>
#endif
#if defined FLAC__CPU_IA32
# include <signal.h>
static void disable_sse(FLAC__CPUInfo *info)
{
info->ia32.fxsr = info->ia32.sse = info->ia32.sse2 = info->ia32.sse3 = info->ia32.ssse3 = info->ia32.sse41 = info->ia32.sse42 = false;
info->ia32.sse = false;
info->ia32.sse2 = false;
info->ia32.sse3 = false;
info->ia32.ssse3 = false;
info->ia32.sse41 = false;
info->ia32.sse42 = false;
}
#endif
@@ -71,6 +79,7 @@ static const unsigned FLAC__CPUINFO_IA32_CPUID_FXSR = 0x01000000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSE = 0x02000000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSE2 = 0x04000000;
#endif
/* these are flags in ECX of CPUID AX=00000001 */
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSE3 = 0x00000001;
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSSE3 = 0x00000200;
@@ -113,37 +122,30 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
* IA32-specific
*/
#ifdef FLAC__CPU_IA32
FLAC__bool ia32_fxsr = false;
(void) ia32_fxsr; /* to avoid warnings about unused variables */
memset(info, 0, sizeof(*info));
info->type = FLAC__CPUINFO_TYPE_IA32;
#if !defined FLAC__NO_ASM && (defined FLAC__HAS_NASM || defined FLAC__HAS_X86INTRIN)
info->use_asm = true; /* we assume a minimum of 80386 with FLAC__CPU_IA32 */
#ifdef FLAC__HAS_NASM
info->ia32.cpuid = FLAC__cpu_have_cpuid_asm_ia32()? true : false;
#else
info->ia32.cpuid = FLAC__cpu_have_cpuid_x86()? true : false;
#endif
info->ia32.bswap = info->ia32.cpuid; /* CPUID => BSWAP since it came after */
info->ia32.cmov = false;
info->ia32.mmx = false;
info->ia32.fxsr = false;
info->ia32.sse = false;
info->ia32.sse2 = false;
info->ia32.sse3 = false;
info->ia32.ssse3 = false;
info->ia32.sse41 = false;
info->ia32.sse42 = false;
if(info->ia32.cpuid == false)
#ifdef FLAC__HAS_X86INTRIN
if(!FLAC__cpu_have_cpuid_x86())
return;
#else
if(!FLAC__cpu_have_cpuid_asm_ia32())
return;
#endif
{
/* http://www.sandpile.org/x86/cpuid.htm */
FLAC__uint32 flags_edx, flags_ecx;
#ifdef FLAC__HAS_NASM
FLAC__cpu_info_asm_ia32(&flags_edx, &flags_ecx);
#else
#ifdef FLAC__HAS_X86INTRIN
FLAC__cpu_info_x86(&flags_edx, &flags_ecx);
#else
FLAC__cpu_info_asm_ia32(&flags_edx, &flags_ecx);
#endif
info->ia32.cmov = (flags_edx & FLAC__CPUINFO_IA32_CPUID_CMOV )? true : false;
info->ia32.mmx = (flags_edx & FLAC__CPUINFO_IA32_CPUID_MMX )? true : false;
info->ia32.fxsr = (flags_edx & FLAC__CPUINFO_IA32_CPUID_FXSR )? true : false;
ia32_fxsr = (flags_edx & FLAC__CPUINFO_IA32_CPUID_FXSR )? true : false;
info->ia32.sse = (flags_edx & FLAC__CPUINFO_IA32_CPUID_SSE )? true : false;
info->ia32.sse2 = (flags_edx & FLAC__CPUINFO_IA32_CPUID_SSE2 )? true : false;
info->ia32.sse3 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE3 )? true : false;
@@ -151,13 +153,11 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
info->ia32.sse41 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE41)? true : false;
info->ia32.sse42 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE42)? true : false;
}
#ifdef DEBUG
fprintf(stderr, "CPU info (IA-32):\n");
fprintf(stderr, " CPUID ...... %c\n", info->ia32.cpuid ? 'Y' : 'n');
fprintf(stderr, " BSWAP ...... %c\n", info->ia32.bswap ? 'Y' : 'n');
fprintf(stderr, " CMOV ....... %c\n", info->ia32.cmov ? 'Y' : 'n');
fprintf(stderr, " MMX ........ %c\n", info->ia32.mmx ? 'Y' : 'n');
fprintf(stderr, " FXSR ....... %c\n", info->ia32.fxsr ? 'Y' : 'n');
fprintf(stderr, " SSE ........ %c\n", info->ia32.sse ? 'Y' : 'n');
fprintf(stderr, " SSE2 ....... %c\n", info->ia32.sse2 ? 'Y' : 'n');
fprintf(stderr, " SSE3 ....... %c\n", info->ia32.sse3 ? 'Y' : 'n');
@@ -194,7 +194,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
len = sizeof(val);
if(sysctl(mib, 2, &val, &len, NULL, 0) < 0 || !val) {
disable_sse(info);
info->ia32.fxsr = info->ia32.sse = true;
info->ia32.sse = true;
}
}
# else
@@ -247,7 +247,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
int sse = 0;
/* Based on the idea described in Agner Fog's manual "Optimizing subroutines in assembly language" */
/* In theory, not guaranteed to detect lack of OS SSE support on some future Intel CPUs, but in practice works (see the aforementioned manual) */
if (info->ia32.fxsr) {
if (ia32_fxsr) {
struct {
FLAC__uint32 buff[128];
} __attribute__((aligned(16))) fxsr;
@@ -273,7 +273,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
disable_sse(info);
#endif
#ifdef DEBUG
fprintf(stderr, " SSE OS sup . %c\n", info->ia32.sse ? 'Y' : 'n');
fprintf(stderr, " SSE OS sup . %c\n", info->ia32.sse ? 'Y' : 'n');
#endif
}
else /* info->ia32.sse == false */
@@ -287,6 +287,7 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
* x86-64-specific
*/
#elif defined FLAC__CPU_X86_64
memset(info, 0, sizeof(*info));
info->type = FLAC__CPUINFO_TYPE_X86_64;
#if !defined FLAC__NO_ASM && defined FLAC__HAS_X86INTRIN
info->use_asm = true;
@@ -294,17 +295,17 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
/* http://www.sandpile.org/x86/cpuid.htm */
FLAC__uint32 flags_edx, flags_ecx;
FLAC__cpu_info_x86(&flags_edx, &flags_ecx);
info->x86_64.sse3 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE3 )? true : false;
info->x86_64.ssse3 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSSE3)? true : false;
info->x86_64.sse41 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE41)? true : false;
info->x86_64.sse42 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE42)? true : false;
info->x86.sse3 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE3 )? true : false;
info->x86.ssse3 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSSE3)? true : false;
info->x86.sse41 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE41)? true : false;
info->x86.sse42 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE42)? true : false;
}
#ifdef DEBUG
fprintf(stderr, "CPU info (x86-64):\n");
fprintf(stderr, " SSE3 ....... %c\n", info->x86_64.sse3 ? 'Y' : 'n');
fprintf(stderr, " SSSE3 ...... %c\n", info->x86_64.ssse3 ? 'Y' : 'n');
fprintf(stderr, " SSE41 ...... %c\n", info->x86_64.sse41 ? 'Y' : 'n');
fprintf(stderr, " SSE42 ...... %c\n", info->x86_64.sse42 ? 'Y' : 'n');
fprintf(stderr, " SSE3 ....... %c\n", info->x86.sse3 ? 'Y' : 'n');
fprintf(stderr, " SSSE3 ...... %c\n", info->x86.ssse3 ? 'Y' : 'n');
fprintf(stderr, " SSE41 ...... %c\n", info->x86.sse41 ? 'Y' : 'n');
fprintf(stderr, " SSE42 ...... %c\n", info->x86.sse42 ? 'Y' : 'n');
#endif
#else

21
src/libFLAC/include/private/cpu.h
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@@ -90,13 +90,11 @@ typedef enum {
#if defined FLAC__CPU_IA32
typedef struct {
FLAC__bool cpuid;
FLAC__bool bswap;
FLAC__bool cmov;
FLAC__bool mmx;
FLAC__bool fxsr;
FLAC__bool sse;
FLAC__bool sse2;
FLAC__bool sse3;
FLAC__bool ssse3;
FLAC__bool sse41;
@@ -108,7 +106,7 @@ typedef struct {
FLAC__bool ssse3;
FLAC__bool sse41;
FLAC__bool sse42;
} FLAC__CPUInfo_x86_64;
} FLAC__CPUInfo_x86;
#endif
typedef struct {
@@ -117,24 +115,21 @@ typedef struct {
#if defined FLAC__CPU_IA32
FLAC__CPUInfo_IA32 ia32;
#elif defined FLAC__CPU_X86_64
FLAC__CPUInfo_x86_64 x86_64;
FLAC__CPUInfo_x86 x86;
#endif
} FLAC__CPUInfo;
void FLAC__cpu_info(FLAC__CPUInfo *info);
#ifndef FLAC__NO_ASM
#if defined FLAC__CPU_IA32 && defined FLAC__HAS_NASM
# if defined FLAC__CPU_IA32 && defined FLAC__HAS_NASM
FLAC__uint32 FLAC__cpu_have_cpuid_asm_ia32(void);
void FLAC__cpu_info_asm_ia32(FLAC__uint32 *flags_edx, FLAC__uint32 *flags_ecx);
#endif
#if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && defined FLAC__HAS_X86INTRIN
# endif
# if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && defined FLAC__HAS_X86INTRIN
FLAC__uint32 FLAC__cpu_have_cpuid_x86(void);
void FLAC__cpu_info_x86(FLAC__uint32 *flags_edx, FLAC__uint32 *flags_ecx);
#endif
void FLAC__cpu_info_x86(FLAC__uint32 *flags_edx, FLAC__uint32 *flags_ecx);
# endif
#endif
#endif

6
src/libFLAC/stream_encoder.c
View File

@@ -978,13 +978,13 @@ static FLAC__StreamEncoderInitStatus init_stream_internal_(
# ifdef FLAC__SSE2_SUPPORTED
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_sse2;
# ifdef FLAC__SSE4_1_SUPPORTED
if(encoder->private_->cpuinfo.x86_64.sse41) {
if(encoder->private_->cpuinfo.x86.sse41) {
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse41;
}
# endif
# ifdef FLAC__SSSE3_SUPPORTED
if (encoder->private_->cpuinfo.x86_64.ssse3) {
if (encoder->private_->cpuinfo.x86.ssse3) {
encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_intrin_ssse3;
encoder->private_->local_fixed_compute_best_predictor_wide = FLAC__fixed_compute_best_predictor_wide_intrin_ssse3;
}
@@ -1015,7 +1015,7 @@ static FLAC__StreamEncoderInitStatus init_stream_internal_(
# elif defined FLAC__CPU_X86_64
# ifdef FLAC__SSE2_SUPPORTED
# ifdef FLAC__SSSE3_SUPPORTED
if(encoder->private_->cpuinfo.x86_64.ssse3)
if(encoder->private_->cpuinfo.x86.ssse3)
encoder->private_->local_precompute_partition_info_sums = FLAC__precompute_partition_info_sums_intrin_ssse3;
else
# endif