mirror of
https://github.com/irungentoo/toxcore.git
synced 2024-03-22 13:30:51 +08:00
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef VANILLA_NACL /* toxcore only uses this when libsodium is unavailable */
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#ifdef HAVE_ANDROID_GETCPUFEATURES
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# include <cpu-features.h>
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#endif
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#include "runtime.h"
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typedef struct CPUFeatures_ {
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int initialized;
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int has_neon;
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int has_sse2;
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int has_sse3;
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} CPUFeatures;
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static CPUFeatures _cpu_features;
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#ifdef HAVE_EMMINTRIN_H
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#define CPUID_SSE2 0x04000000
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#endif
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#ifdef HAVE_PMMINTRIN_H
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#define CPUIDECX_SSE3 0x00000001
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#endif
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static int
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_sodium_runtime_arm_cpu_features(CPUFeatures * const cpu_features)
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{
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#ifndef __arm__
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cpu_features->has_neon = 0;
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return -1;
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#else
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# ifdef __APPLE__
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# ifdef __ARM_NEON__
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cpu_features->has_neon = 1;
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# else
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cpu_features->has_neon = 0;
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# endif
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# elif defined(HAVE_ANDROID_GETCPUFEATURES) && defined(ANDROID_CPU_ARM_FEATURE_NEON)
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cpu_features->has_neon =
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(android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0x0;
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# else
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cpu_features->has_neon = 0;
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# endif
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return 0;
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#endif
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}
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static void
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_cpuid(unsigned int cpu_info[4U], const unsigned int cpu_info_type)
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{
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#ifdef _MSC_VER
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__cpuidex((int *) cpu_info, cpu_info_type, 0);
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#elif defined(HAVE_CPUID)
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cpu_info[0] = cpu_info[1] = cpu_info[2] = cpu_info[3] = 0;
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# ifdef __i386__
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__asm__ __volatile__ ("pushfl; pushfl; "
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"popl %0; "
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"movl %0, %1; xorl %2, %0; "
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"pushl %0; "
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"popfl; pushfl; popl %0; popfl" :
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"=&r" (cpu_info[0]), "=&r" (cpu_info[1]) :
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"i" (0x200000));
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if (((cpu_info[0] ^ cpu_info[1]) & 0x200000) == 0x0) {
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return;
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}
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# endif
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# ifdef __i386__
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__asm__ __volatile__ ("xchgl %%ebx, %k1; cpuid; xchgl %%ebx, %k1" :
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"=a" (cpu_info[0]), "=&r" (cpu_info[1]),
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"=c" (cpu_info[2]), "=d" (cpu_info[3]) :
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"0" (cpu_info_type), "2" (0U));
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# elif defined(__x86_64__)
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__asm__ __volatile__ ("xchgq %%rbx, %q1; cpuid; xchgq %%rbx, %q1" :
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"=a" (cpu_info[0]), "=&r" (cpu_info[1]),
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"=c" (cpu_info[2]), "=d" (cpu_info[3]) :
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"0" (cpu_info_type), "2" (0U));
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# else
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__asm__ __volatile__ ("cpuid" :
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"=a" (cpu_info[0]), "=b" (cpu_info[1]),
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"=c" (cpu_info[2]), "=d" (cpu_info[3]) :
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"0" (cpu_info_type), "2" (0U));
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# endif
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#else
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cpu_info[0] = cpu_info[1] = cpu_info[2] = cpu_info[3] = 0;
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#endif
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}
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static int
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_sodium_runtime_intel_cpu_features(CPUFeatures * const cpu_features)
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{
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unsigned int cpu_info[4];
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unsigned int id;
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_cpuid(cpu_info, 0x0);
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if ((id = cpu_info[0]) == 0U) {
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return -1;
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}
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_cpuid(cpu_info, 0x00000001);
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#ifndef HAVE_EMMINTRIN_H
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cpu_features->has_sse2 = 0;
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#else
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cpu_features->has_sse2 = ((cpu_info[3] & CPUID_SSE2) != 0x0);
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#endif
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#ifndef HAVE_PMMINTRIN_H
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cpu_features->has_sse3 = 0;
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#else
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cpu_features->has_sse3 = ((cpu_info[2] & CPUIDECX_SSE3) != 0x0);
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#endif
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return 0;
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}
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int
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sodium_runtime_get_cpu_features(void)
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{
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int ret = -1;
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ret &= _sodium_runtime_arm_cpu_features(&_cpu_features);
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ret &= _sodium_runtime_intel_cpu_features(&_cpu_features);
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_cpu_features.initialized = 1;
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return ret;
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}
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int
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sodium_runtime_has_neon(void) {
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return _cpu_features.has_neon;
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}
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int
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sodium_runtime_has_sse2(void) {
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return _cpu_features.has_sse2;
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}
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int
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sodium_runtime_has_sse3(void) {
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return _cpu_features.has_sse3;
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}
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#endif
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