_mm_sign_pi16
Classification
SSE_ALL, Arithmetic, CPUID Test: SSSE3
Header File
Instruction
PSIGNW mm, mm
Synopsis
_mm_sign_pi16(__m64 a, __m64 b);
Description
Negate packed 16-bit integers in "a" when the corresponding signed 16-bit integer in "b" is negative, and store the results in "dst". Element in "dst" are zeroed out when the corresponding element in "b" is zero.
Operation
FOR j := 0 to 3
i := j*16
IF b[i+15:i] < 0
dst[i+15:i] := -(a[i+15:i])
ELSE IF b[i+15:i] == 0
dst[i+15:i] := 0
ELSE
dst[i+15:i] := a[i+15:i]
FI
ENDFOR