JezK
Edit File: cpu_popcnt.c
#if defined(DETECT_FEATURES) && defined(__INTEL_COMPILER) /* * Unlike GCC and CLANG, Intel Compiler exposes all supported intrinsics, * whether or not the build options for those features are specified. * Therefore, we must test #definitions of CPU features when option native/host * is enabled via `--cpu-baseline` or through env vr `CFLAGS` otherwise * the test will be broken and leads to enable all possible features. */ #if !defined(__SSE4_2__) && !defined(__POPCNT__) #error "HOST/ARCH doesn't support POPCNT" #endif #endif #ifdef _MSC_VER #include <nmmintrin.h> #else #include <popcntintrin.h> #endif int main(int argc, char **argv) { // To make sure popcnt instructions are generated // and been tested against the assembler unsigned long long a = *((unsigned long long*)argv[argc-1]); unsigned int b = *((unsigned int*)argv[argc-2]); #if defined(_M_X64) || defined(__x86_64__) a = _mm_popcnt_u64(a); #endif b = _mm_popcnt_u32(b); return (int)a + b; }