_mm_fmsub_round_ss
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VFMSUB132SS xmm, xmm, xmm {er}
Synopsis
_mm_fmsub_round_ss(__m128 a, __m128 b, __m128 c, int rounding);
Description
Multiply the lower single-precision (32-bit) floating-point elements in "a" and "b", and subtract the lower element in "c" from the intermediate result. Store the result in the lower element of "dst", and copy the upper 3 packed elements from "a" to the upper elements of "dst".
[round_note]
Operation
dst[31:0] := (a[31:0] * b[31:0]) - c[31:0]
dst[127:32] := a[127:32]
dst[MAX:128] := 0