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https://github.com/cuberite/libdeflate.git
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0d1260be99
The SSE2, AVX2, BMI2, etc. code actually works on 32-bit x86 if the CPU has those features. So there is no need to restrict it to x86_64-only.
41 lines
896 B
C
41 lines
896 B
C
/*
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* x86/cpu_features.h - feature detection for x86 processors
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*/
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#ifndef LIB_X86_CPU_FEATURES_H
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#define LIB_X86_CPU_FEATURES_H
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#include "../lib_common.h"
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#if (defined(__i386__) || defined(__x86_64__)) && \
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COMPILER_SUPPORTS_TARGET_FUNCTION_ATTRIBUTE
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# define X86_CPU_FEATURES_ENABLED 1
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#else
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# define X86_CPU_FEATURES_ENABLED 0
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#endif
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#if X86_CPU_FEATURES_ENABLED
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#define X86_CPU_FEATURE_SSE2 0x00000001
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#define X86_CPU_FEATURE_PCLMULQDQ 0x00000002
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#define X86_CPU_FEATURE_AVX 0x00000004
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#define X86_CPU_FEATURE_AVX2 0x00000008
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#define X86_CPU_FEATURE_BMI2 0x00000010
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#define X86_CPU_FEATURES_KNOWN 0x80000000
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extern volatile u32 _cpu_features;
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extern void setup_cpu_features(void);
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static inline u32 get_cpu_features(void)
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{
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if (_cpu_features == 0)
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setup_cpu_features();
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return _cpu_features;
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}
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#endif /* X86_CPU_FEATURES_ENABLED */
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#endif /* LIB_X86_CPU_FEATURES_H */
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