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Use gcc builtin functions for cpuid

This commit is contained in:
Isaac Connor 2020-08-19 16:57:20 -04:00
parent 8f70ae192d
commit 2773737e54
1 changed files with 11 additions and 43 deletions
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54
src/zm_utils.cpp
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@ -229,63 +229,31 @@ void hwcaps_detect() {
neonversion = 0;
sse_version = 0;
#if (defined(__i386__) || defined(__x86_64__))
/* x86 or x86-64 processor */
uint32_t r_edx, r_ecx, r_ebx;
__builtin_cpu_init();
#ifdef __x86_64__
__asm__ __volatile__(
"push %%rbx\n\t"
"mov $0x0,%%ecx\n\t"
"mov $0x7,%%eax\n\t"
"cpuid\n\t"
"push %%rbx\n\t"
"mov $0x1,%%eax\n\t"
"cpuid\n\t"
"pop %%rax\n\t"
"pop %%rbx\n\t"
: "=d" (r_edx), "=c" (r_ecx), "=a" (r_ebx)
:
:
);
#else
__asm__ __volatile__(
"push %%ebx\n\t"
"mov $0x0,%%ecx\n\t"
"mov $0x7,%%eax\n\t"
"cpuid\n\t"
"push %%ebx\n\t"
"mov $0x1,%%eax\n\t"
"cpuid\n\t"
"pop %%eax\n\t"
"pop %%ebx\n\t"
: "=d" (r_edx), "=c" (r_ecx), "=a" (r_ebx)
:
:
);
#endif
if ( r_ebx & 0x00000020 ) {
if ( __builtin_cpu_supports("avx2") ) {
sse_version = 52; /* AVX2 */
Debug(1, "Detected a x86\\x86-64 processor with AVX2");
} else if ( r_ecx & 0x10000000 ) {
} else if ( __builtin_cpu_supports("avx") ) {
sse_version = 51; /* AVX */
Debug(1, "Detected a x86\\x86-64 processor with AVX");
} else if ( r_ecx & 0x00100000 ) {
} else if ( __builtin_cpu_supports("sse4.2") ) {
sse_version = 42; /* SSE4.2 */
Debug(1, "Detected a x86\\x86-64 processor with SSE4.2");
} else if ( r_ecx & 0x00080000 ) {
} else if ( __builtin_cpu_supports("sse4.1") ) {
sse_version = 41; /* SSE4.1 */
Debug(1, "Detected a x86\\x86-64 processor with SSE4.1");
} else if ( r_ecx & 0x00000200 ) {
} else if ( __builtin_cpu_supports("ssse3") ) {
sse_version = 35; /* SSSE3 */
Debug(1,"Detected a x86\\x86-64 processor with SSSE3");
} else if ( r_ecx & 0x00000001 ) {
} else if ( __builtin_cpu_supports("sse3") ) {
sse_version = 30; /* SSE3 */
Debug(1, "Detected a x86\\x86-64 processor with SSE3");
} else if ( r_edx & 0x04000000 ) {
} else if ( __builtin_cpu_supports("sse2") ) {
sse_version = 20; /* SSE2 */
Debug(1, "Detected a x86\\x86-64 processor with SSE2");
} else if ( r_edx & 0x02000000 ) {
} else if ( __builtin_cpu_supports("sse") ) {
sse_version = 10; /* SSE */
Debug(1, "Detected a x86\\x86-64 processor with SSE");
} else {
@ -320,7 +288,7 @@ __attribute__((noinline,__target__("sse2")))
#endif
void* sse2_aligned_memcpy(void* dest, const void* src, size_t bytes) {
#if ((defined(__i386__) || defined(__x86_64__) || defined(ZM_KEEP_SSE)) && !defined(ZM_STRIP_SSE))
if ( bytes > 128 ) {
if(bytes > 128) {
unsigned int remainder = bytes % 128;
const uint8_t* lastsrc = (uint8_t*)src + (bytes - remainder);
@ -362,7 +330,7 @@ void* sse2_aligned_memcpy(void* dest, const void* src, size_t bytes) {
}
#else
/* Non x86\x86-64 platform, use memcpy */
memcpy(dest, src, bytes);
memcpy(dest,src,bytes);
#endif
return dest;
}