_mm_sub_round_sd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VSUBSD xmm, xmm, xmm {er}
Synopsis
 _mm_sub_round_sd(__m128d a, __m128d b, int rounding);
Description
Subtract the lower double-precision (64-bit) floating-point element in "b" from the lower double-precision (64-bit) floating-point element in "a", store the result in the lower element of "dst", and copy the upper element from "a" to the upper element of "dst". [round_note]
Operation
dst[63:0] := a[63:0] - b[63:0]
dst[127:64] := a[127:64]
dst[MAX:128] := 0