_mm_sign_epi8
Classification
SSE_ALL, Arithmetic, CPUID Test: SSSE3
Header File
tmmintrin.h
Instruction
PSIGNB xmm, xmm
Synopsis
 _mm_sign_epi8(__m128i a, __m128i b);
Description
Negate packed 8-bit integers in "a" when the corresponding signed 8-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 15
	i := j*8
	IF b[i+7:i] < 0
		dst[i+7:i] := -(a[i+7:i])
	ELSE IF b[i+7:i] == 0
		dst[i+7:i] := 0
	ELSE
		dst[i+7:i] := a[i+7:i]
	FI
ENDFOR