OpenBLAS/kernel/simd/intrin_avx.h

#define V_SIMD 256
#define V_SIMD_F64 1
/*
Data Type
*/
typedef __m256  v_f32;
#define v_nlanes_f32 8
/*
arithmetic
*/
#define v_add_f32 _mm256_add_ps
#define v_mul_f32 _mm256_mul_ps

#ifdef HAVE_FMA3
    // multiply and add, a*b + c
    #define v_muladd_f32 _mm256_fmadd_ps
#else
    // multiply and add, a*b + c
    BLAS_FINLINE v_f32 v_muladd_f32(v_f32 a, v_f32 b, v_f32 c)
    { return v_add_f32(v_mul_f32(a, b), c); }
#endif // !HAVE_FMA3

/*
memory
*/
// unaligned load
#define v_loadu_f32 _mm256_loadu_ps
#define v_storeu_f32 _mm256_storeu_ps
#define v_setall_f32(VAL) _mm256_set1_ps(VAL)