cpu-x86: add cpu detection code and helpers

Add CPU detection code and various macros and typdefs to make it easier to write
64 and 32 bit code.
This commit is contained in:
Wim Taymans 2009-08-13 17:11:43 +02:00
parent 5998cf99b0
commit a83f5524fb
3 changed files with 184 additions and 0 deletions

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@ -825,6 +825,7 @@ libpulsecore_@PA_MAJORMINORMICRO@_la_SOURCES = \
pulsecore/resampler.c pulsecore/resampler.h \ pulsecore/resampler.c pulsecore/resampler.h \
pulsecore/rtpoll.c pulsecore/rtpoll.h \ pulsecore/rtpoll.c pulsecore/rtpoll.h \
pulsecore/sample-util.c pulsecore/sample-util.h \ pulsecore/sample-util.c pulsecore/sample-util.h \
pulsecore/cpu-x86.c \
pulsecore/svolume_c.c \ pulsecore/svolume_c.c \
pulsecore/svolume_mmx.c pulsecore/svolume_sse.c \ pulsecore/svolume_mmx.c pulsecore/svolume_sse.c \
pulsecore/sconv-s16be.c pulsecore/sconv-s16be.h \ pulsecore/sconv-s16be.c pulsecore/sconv-s16be.h \

122
src/pulsecore/cpu-x86.c Normal file
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@ -0,0 +1,122 @@
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdint.h>
#include <pulsecore/log.h>
#include "cpu-x86.h"
#if defined (__i386__) || defined (__amd64__)
static void
get_cpuid (uint32_t op, uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d)
{
__asm__ __volatile__ (
" push %%"PA_REG_b" \n\t"
" cpuid \n\t"
" mov %%ebx, %%esi \n\t"
" pop %%"PA_REG_b" \n\t"
: "=a" (*a), "=S" (*b), "=c" (*c), "=d" (*d)
: "0" (op));
}
#endif
static pa_cpu_x86_flag_t pa_cpu_x86_flags;
void pa_cpu_init_x86 (void) {
#if defined (__i386__) || defined (__amd64__)
uint32_t eax, ebx, ecx, edx;
uint32_t level;
/* get standard level */
get_cpuid (0x00000000, &level, &ebx, &ecx, &edx);
if (level >= 1) {
get_cpuid (0x00000001, &eax, &ebx, &ecx, &edx);
if (edx & (1<<23))
pa_cpu_x86_flags |= PA_CPU_X86_MMX;
if (edx & (1<<25))
pa_cpu_x86_flags |= PA_CPU_X86_SSE;
if (edx & (1<<26))
pa_cpu_x86_flags |= PA_CPU_X86_SSE2;
if (ecx & (1<<0))
pa_cpu_x86_flags |= PA_CPU_X86_SSE3;
if (ecx & (1<<9))
pa_cpu_x86_flags |= PA_CPU_X86_SSSE3;
if (ecx & (1<<19))
pa_cpu_x86_flags |= PA_CPU_X86_SSE4_1;
if (ecx & (1<<20))
pa_cpu_x86_flags |= PA_CPU_X86_SSE4_2;
}
/* get extended level */
get_cpuid (0x80000000, &level, &ebx, &ecx, &edx);
if (level >= 0x80000001) {
get_cpuid (0x80000001, &eax, &ebx, &ecx, &edx);
if (edx & (1<<22))
pa_cpu_x86_flags |= PA_CPU_X86_MMXEXT;
if (edx & (1<<23))
pa_cpu_x86_flags |= PA_CPU_X86_MMX;
if (edx & (1<<30))
pa_cpu_x86_flags |= PA_CPU_X86_3DNOWEXT;
if (edx & (1<<31))
pa_cpu_x86_flags |= PA_CPU_X86_3DNOW;
}
pa_log_info ("CPU flags: %s%s%s%s%s%s%s%s%s%s",
(pa_cpu_x86_flags & PA_CPU_X86_MMX) ? "MMX " : "",
(pa_cpu_x86_flags & PA_CPU_X86_SSE) ? "SSE " : "",
(pa_cpu_x86_flags & PA_CPU_X86_SSE2) ? "SSE2 " : "",
(pa_cpu_x86_flags & PA_CPU_X86_SSE3) ? "SSE3 " : "",
(pa_cpu_x86_flags & PA_CPU_X86_SSSE3) ? "SSSE3 " : "",
(pa_cpu_x86_flags & PA_CPU_X86_SSE4_1) ? "SSE4_1 " : "",
(pa_cpu_x86_flags & PA_CPU_X86_SSE4_2) ? "SSE4_2 " : "",
(pa_cpu_x86_flags & PA_CPU_X86_MMXEXT) ? "MMXEXT " : "",
(pa_cpu_x86_flags & PA_CPU_X86_3DNOW) ? "3DNOW " : "",
(pa_cpu_x86_flags & PA_CPU_X86_3DNOWEXT) ? "3DNOWEXT " : "");
/* activate various optimisations */
if (pa_cpu_x86_flags & PA_CPU_X86_MMX) {
pa_volume_func_init_mmx (pa_cpu_x86_flags);
}
if (pa_cpu_x86_flags & PA_CPU_X86_SSE) {
pa_volume_func_init_sse (pa_cpu_x86_flags);
}
#else
pa_cpu_x86_flags = 0;
#endif
}

61
src/pulsecore/cpu-x86.h Normal file
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@ -0,0 +1,61 @@
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <stdint.h>
typedef enum pa_cpu_x86_flag {
PA_CPU_X86_MMX = (1 << 0),
PA_CPU_X86_MMXEXT = (1 << 1),
PA_CPU_X86_SSE = (1 << 2),
PA_CPU_X86_SSE2 = (1 << 3),
PA_CPU_X86_SSE3 = (1 << 4),
PA_CPU_X86_SSSE3 = (1 << 5),
PA_CPU_X86_SSE4_1 = (1 << 6),
PA_CPU_X86_SSE4_2 = (1 << 7),
PA_CPU_X86_3DNOW = (1 << 8),
PA_CPU_X86_3DNOWEXT = (1 << 9)
} pa_cpu_x86_flag_t;
void pa_cpu_init_x86 (void);
#if defined (__i386__)
typedef int32_t pa_reg_x86;
#define PA_REG_a "eax"
#define PA_REG_b "ebx"
#define PA_REG_c "ecx"
#define PA_REG_d "edx"
#define PA_REG_D "edi"
#define PA_REG_S "esi"
#elif defined (__amd64__)
typedef int64_t pa_reg_x86;
#define PA_REG_a "rax"
#define PA_REG_b "rbx"
#define PA_REG_c "rcx"
#define PA_REG_d "rdx"
#define PA_REG_D "rdi"
#define PA_REG_S "rsi"
#endif
/* some optimized functions */
void pa_volume_func_init_mmx(pa_cpu_x86_flag_t flags);
void pa_volume_func_init_sse(pa_cpu_x86_flag_t flags);