_mm_mask_sub_round_ss
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VSUBSS xmm {k}, xmm, xmm {er}
Synopsis
_mm_mask_sub_round_ss(__m128 src, __mmask8 k, __m128 a, __m128 b, int rounding);
Description
Subtract the lower single-precision (32-bit) floating-point element in "b" from the lower single-precision (32-bit) floating-point element in "a", store the result in the lower element of "dst" using writemask "k" (the element is copied from "src" when mask bit 0 is not set), and copy the upper 3 packed elements from "a" to the upper elements of "dst".
[round_note]
Operation
IF k[0]
dst[31:0] := a[31:0] - b[31:0]
ELSE
dst[31:0] := src[31:0]
FI
dst[127:32] := a[127:32]
dst[MAX:128] := 0