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- #define V_SIMD 256
- #define V_SIMD_F64 1
- /***************************
- * Data Type
- ***************************/
- typedef __m256 v_f32;
- typedef __m256d v_f64;
- #define v_nlanes_f32 8
- #define v_nlanes_f64 4
- /***************************
- * Arithmetic
- ***************************/
- #define v_add_f32 _mm256_add_ps
- #define v_add_f64 _mm256_add_pd
- #define v_sub_f32 _mm256_sub_ps
- #define v_sub_f64 _mm256_sub_pd
- #define v_mul_f32 _mm256_mul_ps
- #define v_mul_f64 _mm256_mul_pd
-
- #ifdef HAVE_FMA3
- // multiply and add, a*b + c
- #define v_muladd_f32 _mm256_fmadd_ps
- #define v_muladd_f64 _mm256_fmadd_pd
- // multiply and subtract, a*b - c
- #define v_mulsub_f32 _mm256_fmsub_ps
- #define v_mulsub_f64 _mm256_fmsub_pd
- #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); }
- BLAS_FINLINE v_f64 v_muladd_f64(v_f64 a, v_f64 b, v_f64 c)
- { return v_add_f64(v_mul_f64(a, b), c); }
- // multiply and subtract, a*b - c
- BLAS_FINLINE v_f32 v_mulsub_f32(v_f32 a, v_f32 b, v_f32 c)
- { return v_sub_f32(v_mul_f32(a, b), c); }
- BLAS_FINLINE v_f64 v_mulsub_f64(v_f64 a, v_f64 b, v_f64 c)
- { return v_sub_f64(v_mul_f64(a, b), c); }
- #endif // !HAVE_FMA3
-
- // Horizontal add: Calculates the sum of all vector elements.
- BLAS_FINLINE float v_sum_f32(__m256 a)
- {
- __m256 sum_halves = _mm256_hadd_ps(a, a);
- sum_halves = _mm256_hadd_ps(sum_halves, sum_halves);
- __m128 lo = _mm256_castps256_ps128(sum_halves);
- __m128 hi = _mm256_extractf128_ps(sum_halves, 1);
- __m128 sum = _mm_add_ps(lo, hi);
- return _mm_cvtss_f32(sum);
- }
-
- BLAS_FINLINE double v_sum_f64(__m256d a)
- {
- __m256d sum_halves = _mm256_hadd_pd(a, a);
- __m128d lo = _mm256_castpd256_pd128(sum_halves);
- __m128d hi = _mm256_extractf128_pd(sum_halves, 1);
- __m128d sum = _mm_add_pd(lo, hi);
- return _mm_cvtsd_f64(sum);
- }
- /***************************
- * memory
- ***************************/
- // unaligned load
- #define v_loadu_f32 _mm256_loadu_ps
- #define v_loadu_f64 _mm256_loadu_pd
- #define v_storeu_f32 _mm256_storeu_ps
- #define v_storeu_f64 _mm256_storeu_pd
- #define v_setall_f32(VAL) _mm256_set1_ps(VAL)
- #define v_setall_f64(VAL) _mm256_set1_pd(VAL)
- #define v_zero_f32 _mm256_setzero_ps
- #define v_zero_f64 _mm256_setzero_pd
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