98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*
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getcpucpuflags: get cpuflags for ia32
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copyright ?-2007 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http:#mpg123.org
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initially written by KIMURA Takuhiro (for 3DNow!)
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extended for general use by Thomas Orgis
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*/
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#ifndef MPG123_H_GETCPUFLAGS
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#define MPG123_H_GETCPUFLAGS
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#include "config.h"
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/* standard level flags part 1 (ECX)*/
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#define FLAG_SSE3 0x00000001
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#define FLAG_SSSE3 0x00000200
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#define FLAG_AVX 0x1C000000
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/* standard level flags part 2 (EDX) */
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#define FLAG2_MMX 0x00800000
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#define FLAG2_SSE 0x02000000
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#define FLAG2_SSE2 0x04000000
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#define FLAG2_FPU 0x00000001
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/* cpuid extended level 1 (AMD) */
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#define XFLAG_MMX 0x00800000
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#define XFLAG_3DNOW 0x80000000
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#define XFLAG_3DNOWEXT 0x40000000
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/* eXtended Control Register 0 */
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#define XCR0FLAG_AVX 0x00000006
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struct cpuflags
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{
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#if defined(OPT_ARM) || defined(OPT_NEON) || defined(OPT_NEON64)
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unsigned int has_neon;
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#else
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unsigned int id;
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unsigned int std;
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unsigned int std2;
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unsigned int ext;
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unsigned int xcr0_lo;
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#endif
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};
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unsigned int getcpuflags(struct cpuflags* cf);
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#ifdef WANT_GETCPUFLAGS
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#include <string.h>
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// Wrapper needed for ignorant clang memory sanitizer that chokes
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// because it does not know the assembly code intialized the vlaues.
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static unsigned int wrap_getcpuflags(struct cpuflags* cf)
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{
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memset(cf, 0, sizeof(*cf));
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return getcpuflags(cf);
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}
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#endif
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#if ((defined OPT_X86) || (defined OPT_X86_64) || (defined OPT_NEON) || (defined OPT_NEON64)) && (defined OPT_MULTI)
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// We really evaluate the CPU flags.
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#define OPT_CPU_FLAGS
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/* checks the family */
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#define cpu_i586(s) ( ((s.id & 0xf00)>>8) == 0 || ((s.id & 0xf00)>>8) > 4 )
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/* checking some flags... */
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#define cpu_fpu(s) (FLAG2_FPU & s.std2)
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#define cpu_mmx(s) (FLAG2_MMX & s.std2 || XFLAG_MMX & s.ext)
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#define cpu_3dnow(s) (XFLAG_3DNOW & s.ext)
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#define cpu_3dnowext(s) (XFLAG_3DNOWEXT & s.ext)
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#define cpu_sse(s) (FLAG2_SSE & s.std2)
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#define cpu_sse2(s) (FLAG2_SSE2 & s.std2)
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#define cpu_sse3(s) (FLAG_SSE3 & s.std)
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#define cpu_avx(s) ((FLAG_AVX & s.std) == FLAG_AVX && (XCR0FLAG_AVX & s.xcr0_lo) == XCR0FLAG_AVX)
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#define cpu_fast_sse(s) ((((s.id & 0xf00)>>8) == 6 && FLAG_SSSE3 & s.std) /* for Intel/VIA; family 6 CPUs with SSSE3 */ || \
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(((s.id & 0xf00)>>8) == 0xf && (((s.id & 0x0ff00000)>>20) > 0 && ((s.id & 0x0ff00000)>>20) != 5))) /* for AMD; family > 0xF CPUs except Bobcat */
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#define cpu_neon(s) (s.has_neon)
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#else
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/* Faking stuff for non-multi builds. The same code for synth function choice is used.
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Just no runtime dependency of result... */
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#define cpu_flags nothing
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#define cpu_i586(s) 1
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#define cpu_fpu(s) 1
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#define cpu_mmx(s) 1
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#define cpu_3dnow(s) 1
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#define cpu_3dnowext(s) 1
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#define cpu_sse(s) 1
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#define cpu_sse2(s) 1
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#define cpu_sse3(s) 1
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#define cpu_avx(s) 1
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#define cpu_neon(s) 1
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#endif
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#endif
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