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RetroArch/deps/libFLAC/cpu.c
Brian Koropoff 4ead5da18a deps: import libFLAC 
This is needed by libchdr
2017-09-17 02:02:04 -07:00

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/* libFLAC - Free Lossless Audio Codec library
* Copyright (C) 2001-2009 Josh Coalson
* Copyright (C) 2011-2016 Xiph.Org Foundation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the Xiph.org Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "private/cpu.h"
#include "share/compat.h"
#include <stdlib.h>
#include <string.h>
#if defined(_MSC_VER)
# include <intrin.h> /* for __cpuid() and _xgetbv() */
#endif
#if defined __GNUC__ && defined HAVE_CPUID_H
# include <cpuid.h> /* for __get_cpuid() and __get_cpuid_max() */
#endif
#ifdef DEBUG
#include <stdio.h>
#define dfprintf fprintf
#else
/* This is bad practice, it should be a static void empty function */
#define dfprintf(file, format, ...)
#endif
#if defined FLAC__CPU_IA32
/* these are flags in EDX of CPUID AX=00000001 */
static const unsigned FLAC__CPUINFO_IA32_CPUID_CMOV = 0x00008000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_MMX = 0x00800000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSE = 0x02000000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSE2 = 0x04000000;
#endif
#if FLAC__HAS_X86INTRIN || FLAC__AVX_SUPPORTED
/* 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;
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSE41 = 0x00080000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_SSE42 = 0x00100000;
/* these are flags in ECX of CPUID AX=00000001 */
static const unsigned FLAC__CPUINFO_IA32_CPUID_OSXSAVE = 0x08000000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_AVX = 0x10000000;
static const unsigned FLAC__CPUINFO_IA32_CPUID_FMA = 0x00001000;
/* these are flags in EBX of CPUID AX=00000007 */
static const unsigned FLAC__CPUINFO_IA32_CPUID_AVX2 = 0x00000020;
#endif
#if defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64
static uint32_t
cpu_xgetbv_x86(void)
{
#if (defined _MSC_VER || defined __INTEL_COMPILER) && FLAC__HAS_X86INTRIN && FLAC__AVX_SUPPORTED
return (uint32_t)_xgetbv(0);
#elif defined __GNUC__
uint32_t lo, hi;
asm volatile (".byte 0x0f, 0x01, 0xd0" : "=a"(lo), "=d"(hi) : "c" (0));
return lo;
#else
return 0;
#endif
}
#endif
static void
ia32_cpu_info (FLAC__CPUInfo *info)
{
#if !defined FLAC__CPU_IA32
(void) info;
#else
FLAC__bool ia32_osxsave = false;
FLAC__uint32 flags_eax, flags_ebx, flags_ecx, flags_edx;
#if !defined FLAC__NO_ASM && (defined FLAC__HAS_NASM || FLAC__HAS_X86INTRIN)
info->use_asm = true; /* we assume a minimum of 80386 with FLAC__CPU_IA32 */
#if defined FLAC__HAS_NASM
if(!FLAC__cpu_have_cpuid_asm_ia32())
return;
#endif
/* http://www.sandpile.org/x86/cpuid.htm */
if (FLAC__HAS_X86INTRIN) {
FLAC__cpu_info_x86(0, &flags_eax, &flags_ebx, &flags_ecx, &flags_edx);
info->ia32.intel = (flags_ebx == 0x756E6547 && flags_edx == 0x49656E69 && flags_ecx == 0x6C65746E) ? true : false; /* GenuineIntel */
FLAC__cpu_info_x86(1, &flags_eax, &flags_ebx, &flags_ecx, &flags_edx);
}
else {
FLAC__cpu_info_asm_ia32(&flags_edx, &flags_ecx);
}
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.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;
info->ia32.ssse3 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSSE3) ? true : false;
info->ia32.sse41 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE41) ? true : false;
info->ia32.sse42 = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_SSE42) ? true : false;
if (FLAC__HAS_X86INTRIN && FLAC__AVX_SUPPORTED) {
ia32_osxsave = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_OSXSAVE) ? true : false;
info->ia32.avx = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_AVX ) ? true : false;
info->ia32.fma = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_FMA ) ? true : false;
FLAC__cpu_info_x86(7, &flags_eax, &flags_ebx, &flags_ecx, &flags_edx);
info->ia32.avx2 = (flags_ebx & FLAC__CPUINFO_IA32_CPUID_AVX2 ) ? true : false;
}
dfprintf(stderr, "CPU info (IA-32):\n");
dfprintf(stderr, " CMOV ....... %c\n", info->ia32.cmov ? 'Y' : 'n');
dfprintf(stderr, " MMX ........ %c\n", info->ia32.mmx ? 'Y' : 'n');
dfprintf(stderr, " SSE ........ %c\n", info->ia32.sse ? 'Y' : 'n');
dfprintf(stderr, " SSE2 ....... %c\n", info->ia32.sse2 ? 'Y' : 'n');
dfprintf(stderr, " SSE3 ....... %c\n", info->ia32.sse3 ? 'Y' : 'n');
dfprintf(stderr, " SSSE3 ...... %c\n", info->ia32.ssse3 ? 'Y' : 'n');
dfprintf(stderr, " SSE41 ...... %c\n", info->ia32.sse41 ? 'Y' : 'n');
dfprintf(stderr, " SSE42 ...... %c\n", info->ia32.sse42 ? 'Y' : 'n');
if (FLAC__HAS_X86INTRIN && FLAC__AVX_SUPPORTED) {
dfprintf(stderr, " AVX ........ %c\n", info->ia32.avx ? 'Y' : 'n');
dfprintf(stderr, " FMA ........ %c\n", info->ia32.fma ? 'Y' : 'n');
dfprintf(stderr, " AVX2 ....... %c\n", info->ia32.avx2 ? 'Y' : 'n');
}
/*
* now have to check for OS support of AVX instructions
*/
if (!FLAC__HAS_X86INTRIN || !info->ia32.avx || !ia32_osxsave || (cpu_xgetbv_x86() & 0x6) != 0x6) {
/* no OS AVX support */
info->ia32.avx = false;
info->ia32.avx2 = false;
info->ia32.fma = false;
}
if (FLAC__HAS_X86INTRIN && FLAC__AVX_SUPPORTED) {
dfprintf(stderr, " AVX OS sup . %c\n", info->ia32.avx ? 'Y' : 'n');
}
#else
info->use_asm = false;
#endif
#endif
}
static void
x86_64_cpu_info (FLAC__CPUInfo *info)
{
#if !defined FLAC__NO_ASM && FLAC__HAS_X86INTRIN
FLAC__bool x86_osxsave = false;
FLAC__uint32 flags_eax, flags_ebx, flags_ecx, flags_edx;
info->use_asm = true;
/* http://www.sandpile.org/x86/cpuid.htm */
FLAC__cpu_info_x86(0, &flags_eax, &flags_ebx, &flags_ecx, &flags_edx);
info->x86.intel = (flags_ebx == 0x756E6547 && flags_edx == 0x49656E69 && flags_ecx == 0x6C65746E) ? true : false; /* GenuineIntel */
FLAC__cpu_info_x86(1, &flags_eax, &flags_ebx, &flags_ecx, &flags_edx);
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;
if (FLAC__AVX_SUPPORTED) {
x86_osxsave = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_OSXSAVE) ? true : false;
info->x86.avx = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_AVX ) ? true : false;
info->x86.fma = (flags_ecx & FLAC__CPUINFO_IA32_CPUID_FMA ) ? true : false;
FLAC__cpu_info_x86(7, &flags_eax, &flags_ebx, &flags_ecx, &flags_edx);
info->x86.avx2 = (flags_ebx & FLAC__CPUINFO_IA32_CPUID_AVX2 ) ? true : false;
}
dfprintf(stderr, "CPU info (x86-64):\n");
dfprintf(stderr, " SSE3 ....... %c\n", info->x86.sse3 ? 'Y' : 'n');
dfprintf(stderr, " SSSE3 ...... %c\n", info->x86.ssse3 ? 'Y' : 'n');
dfprintf(stderr, " SSE41 ...... %c\n", info->x86.sse41 ? 'Y' : 'n');
dfprintf(stderr, " SSE42 ...... %c\n", info->x86.sse42 ? 'Y' : 'n');
if (FLAC__AVX_SUPPORTED) {
dfprintf(stderr, " AVX ........ %c\n", info->x86.avx ? 'Y' : 'n');
dfprintf(stderr, " FMA ........ %c\n", info->x86.fma ? 'Y' : 'n');
dfprintf(stderr, " AVX2 ....... %c\n", info->x86.avx2 ? 'Y' : 'n');
}
/*
* now have to check for OS support of AVX instructions
*/
if (!info->x86.avx || !x86_osxsave || (cpu_xgetbv_x86() & 0x6) != 0x6) {
/* no OS AVX support */
info->x86.avx = false;
info->x86.avx2 = false;
info->x86.fma = false;
}
if (FLAC__AVX_SUPPORTED) {
dfprintf(stderr, " AVX OS sup . %c\n", info->x86.avx ? 'Y' : 'n');
}
#else
/* Silence compiler warnings. */
(void) info;
#if defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64
if (0) cpu_xgetbv_x86 ();
#endif
#endif
}
void FLAC__cpu_info (FLAC__CPUInfo *info)
{
memset(info, 0, sizeof(*info));
#ifdef FLAC__CPU_IA32
info->type = FLAC__CPUINFO_TYPE_IA32;
#elif defined FLAC__CPU_X86_64
info->type = FLAC__CPUINFO_TYPE_X86_64;
#else
info->type = FLAC__CPUINFO_TYPE_UNKNOWN;
info->use_asm = false;
#endif
switch (info->type) {
case FLAC__CPUINFO_TYPE_IA32:
ia32_cpu_info (info);
break;
case FLAC__CPUINFO_TYPE_X86_64:
x86_64_cpu_info (info);
break;
default:
info->use_asm = false;
break;
}
}
#if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN
void FLAC__cpu_info_x86(FLAC__uint32 level, FLAC__uint32 *eax, FLAC__uint32 *ebx, FLAC__uint32 *ecx, FLAC__uint32 *edx)
{
#if defined _MSC_VER || defined __INTEL_COMPILER
int cpuinfo[4];
int ext = level & 0x80000000;
__cpuid(cpuinfo, ext);
if((unsigned)cpuinfo[0] >= level) {
#if FLAC__AVX_SUPPORTED
__cpuidex(cpuinfo, ext, 0); /* for AVX2 detection */
#else
__cpuid(cpuinfo, ext); /* some old compilers don't support __cpuidex */
#endif
*eax = cpuinfo[0]; *ebx = cpuinfo[1]; *ecx = cpuinfo[2]; *edx = cpuinfo[3];
return;
}
#elif defined __GNUC__ && defined HAVE_CPUID_H
FLAC__uint32 ext = level & 0x80000000;
__cpuid(ext, *eax, *ebx, *ecx, *edx);
if (*eax >= level) {
__cpuid_count(level, 0, *eax, *ebx, *ecx, *edx);
return;
}
#endif
*eax = *ebx = *ecx = *edx = 0;
}
#endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
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