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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
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
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 = \
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pulsecore/resampler.c pulsecore/resampler.h \
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pulsecore/rtpoll.c pulsecore/rtpoll.h \
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pulsecore/sample-util.c pulsecore/sample-util.h \
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pulsecore/cpu-x86.c \
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pulsecore/svolume_c.c \
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pulsecore/svolume_mmx.c pulsecore/svolume_sse.c \
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pulsecore/sconv-s16be.c pulsecore/sconv-s16be.h \
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122
src/pulsecore/cpu-x86.c
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122
src/pulsecore/cpu-x86.c
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@ -0,0 +1,122 @@
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdint.h>
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#include <pulsecore/log.h>
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#include "cpu-x86.h"
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#if defined (__i386__) || defined (__amd64__)
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static void
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get_cpuid (uint32_t op, uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d)
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{
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__asm__ __volatile__ (
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" push %%"PA_REG_b" \n\t"
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" cpuid \n\t"
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" mov %%ebx, %%esi \n\t"
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" pop %%"PA_REG_b" \n\t"
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: "=a" (*a), "=S" (*b), "=c" (*c), "=d" (*d)
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: "0" (op));
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}
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#endif
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static pa_cpu_x86_flag_t pa_cpu_x86_flags;
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void pa_cpu_init_x86 (void) {
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#if defined (__i386__) || defined (__amd64__)
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uint32_t eax, ebx, ecx, edx;
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uint32_t level;
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/* get standard level */
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get_cpuid (0x00000000, &level, &ebx, &ecx, &edx);
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if (level >= 1) {
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get_cpuid (0x00000001, &eax, &ebx, &ecx, &edx);
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if (edx & (1<<23))
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pa_cpu_x86_flags |= PA_CPU_X86_MMX;
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if (edx & (1<<25))
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pa_cpu_x86_flags |= PA_CPU_X86_SSE;
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if (edx & (1<<26))
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pa_cpu_x86_flags |= PA_CPU_X86_SSE2;
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if (ecx & (1<<0))
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pa_cpu_x86_flags |= PA_CPU_X86_SSE3;
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if (ecx & (1<<9))
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pa_cpu_x86_flags |= PA_CPU_X86_SSSE3;
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if (ecx & (1<<19))
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pa_cpu_x86_flags |= PA_CPU_X86_SSE4_1;
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if (ecx & (1<<20))
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pa_cpu_x86_flags |= PA_CPU_X86_SSE4_2;
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}
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/* get extended level */
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get_cpuid (0x80000000, &level, &ebx, &ecx, &edx);
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if (level >= 0x80000001) {
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get_cpuid (0x80000001, &eax, &ebx, &ecx, &edx);
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if (edx & (1<<22))
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pa_cpu_x86_flags |= PA_CPU_X86_MMXEXT;
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if (edx & (1<<23))
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pa_cpu_x86_flags |= PA_CPU_X86_MMX;
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if (edx & (1<<30))
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pa_cpu_x86_flags |= PA_CPU_X86_3DNOWEXT;
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if (edx & (1<<31))
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pa_cpu_x86_flags |= PA_CPU_X86_3DNOW;
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}
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pa_log_info ("CPU flags: %s%s%s%s%s%s%s%s%s%s",
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(pa_cpu_x86_flags & PA_CPU_X86_MMX) ? "MMX " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_SSE) ? "SSE " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_SSE2) ? "SSE2 " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_SSE3) ? "SSE3 " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_SSSE3) ? "SSSE3 " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_SSE4_1) ? "SSE4_1 " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_SSE4_2) ? "SSE4_2 " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_MMXEXT) ? "MMXEXT " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_3DNOW) ? "3DNOW " : "",
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(pa_cpu_x86_flags & PA_CPU_X86_3DNOWEXT) ? "3DNOWEXT " : "");
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/* activate various optimisations */
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if (pa_cpu_x86_flags & PA_CPU_X86_MMX) {
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pa_volume_func_init_mmx (pa_cpu_x86_flags);
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}
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if (pa_cpu_x86_flags & PA_CPU_X86_SSE) {
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pa_volume_func_init_sse (pa_cpu_x86_flags);
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}
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#else
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pa_cpu_x86_flags = 0;
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#endif
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}
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61
src/pulsecore/cpu-x86.h
Normal file
61
src/pulsecore/cpu-x86.h
Normal file
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@ -0,0 +1,61 @@
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <stdint.h>
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typedef enum pa_cpu_x86_flag {
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PA_CPU_X86_MMX = (1 << 0),
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PA_CPU_X86_MMXEXT = (1 << 1),
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PA_CPU_X86_SSE = (1 << 2),
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PA_CPU_X86_SSE2 = (1 << 3),
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PA_CPU_X86_SSE3 = (1 << 4),
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PA_CPU_X86_SSSE3 = (1 << 5),
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PA_CPU_X86_SSE4_1 = (1 << 6),
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PA_CPU_X86_SSE4_2 = (1 << 7),
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PA_CPU_X86_3DNOW = (1 << 8),
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PA_CPU_X86_3DNOWEXT = (1 << 9)
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} pa_cpu_x86_flag_t;
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void pa_cpu_init_x86 (void);
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#if defined (__i386__)
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typedef int32_t pa_reg_x86;
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#define PA_REG_a "eax"
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#define PA_REG_b "ebx"
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#define PA_REG_c "ecx"
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#define PA_REG_d "edx"
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#define PA_REG_D "edi"
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#define PA_REG_S "esi"
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#elif defined (__amd64__)
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typedef int64_t pa_reg_x86;
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#define PA_REG_a "rax"
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#define PA_REG_b "rbx"
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#define PA_REG_c "rcx"
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#define PA_REG_d "rdx"
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#define PA_REG_D "rdi"
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#define PA_REG_S "rsi"
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#endif
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/* some optimized functions */
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void pa_volume_func_init_mmx(pa_cpu_x86_flag_t flags);
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void pa_volume_func_init_sse(pa_cpu_x86_flag_t flags);
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