mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/***
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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 get_cpuid(uint32_t op, uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d) {
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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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}
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#endif
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pa_bool_t pa_cpu_init_x86(pa_cpu_x86_flag_t *flags) {
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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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*flags = 0;
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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<<15))
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*flags |= PA_CPU_X86_CMOV;
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if (edx & (1<<23))
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*flags |= PA_CPU_X86_MMX;
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if (edx & (1<<25))
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*flags |= PA_CPU_X86_SSE;
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if (edx & (1<<26))
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*flags |= PA_CPU_X86_SSE2;
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if (ecx & (1<<0))
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*flags |= PA_CPU_X86_SSE3;
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if (ecx & (1<<9))
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*flags |= PA_CPU_X86_SSSE3;
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if (ecx & (1<<19))
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*flags |= PA_CPU_X86_SSE4_1;
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if (ecx & (1<<20))
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*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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*flags |= PA_CPU_X86_MMXEXT;
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if (edx & (1<<23))
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*flags |= PA_CPU_X86_MMX;
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if (edx & (1<<30))
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*flags |= PA_CPU_X86_3DNOWEXT;
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if (edx & (1<<31))
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*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%s",
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(*flags & PA_CPU_X86_CMOV) ? "CMOV " : "",
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(*flags & PA_CPU_X86_MMX) ? "MMX " : "",
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(*flags & PA_CPU_X86_SSE) ? "SSE " : "",
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(*flags & PA_CPU_X86_SSE2) ? "SSE2 " : "",
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(*flags & PA_CPU_X86_SSE3) ? "SSE3 " : "",
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(*flags & PA_CPU_X86_SSSE3) ? "SSSE3 " : "",
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(*flags & PA_CPU_X86_SSE4_1) ? "SSE4_1 " : "",
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(*flags & PA_CPU_X86_SSE4_2) ? "SSE4_2 " : "",
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(*flags & PA_CPU_X86_MMXEXT) ? "MMXEXT " : "",
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(*flags & PA_CPU_X86_3DNOW) ? "3DNOW " : "",
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(*flags & PA_CPU_X86_3DNOWEXT) ? "3DNOWEXT " : "");
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/* activate various optimisations */
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if (*flags & PA_CPU_X86_MMX) {
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pa_volume_func_init_mmx(*flags);
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pa_remap_func_init_mmx(*flags);
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}
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if (*flags & (PA_CPU_X86_SSE | PA_CPU_X86_SSE2)) {
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pa_volume_func_init_sse(*flags);
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pa_remap_func_init_sse(*flags);
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pa_convert_func_init_sse(*flags);
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}
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return TRUE;
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#else /* defined (__i386__) || defined (__amd64__) */
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return FALSE;
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#endif /* defined (__i386__) || defined (__amd64__) */
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}
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