관리-도구

편집 파일: cpu_sse42.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 var `CFLAGS` otherwise * the test will be broken and leads to enable all possible features. */ #ifndef __SSE4_2__ #error "HOST/ARCH doesn't support SSE42" #endif #endif #include <smmintrin.h> int main(void) { __m128 a = _mm_hadd_ps(_mm_setzero_ps(), _mm_setzero_ps()); return (int)_mm_cvtss_f32(a); }