[−][src]Function safe_arch::fused_mul_subadd_m256d
#[must_use]pub fn fused_mul_subadd_m256d(a: m256d, b: m256d, c: m256d) -> m256d
This is supported with target feature
fma
only.Lanewise fused (a * b) subadd c
(subtracts odd lanes and adds even lanes)
let a = m256d::from_array([1.0, 2.0, 3.0, 4.0]); let b = m256d::from_array([5.0, 6.0, 7.0, 8.0]); let c = m256d::from_array([1.0, 1.0, 1.0, 1.0]); let d = fused_mul_subadd_m256d(a, b, c).to_array(); assert_eq!(d, [6.0, 11.0, 22.0, 31.0]);
- Intrinsic:
_mm256_fmsubadd_pd
- Assembly: one of
vfmsubadd132pd ymm, ymm, ymm
vfmsubadd213pd ymm, ymm, ymm
vfmsubadd231pd ymm, ymm, ymm