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_mm256_subs_epi8/16

Subtracts the signed 8/16-bit integer data elements with saturation of two vectors. The corresponding Intel® AVX2 instruction is
VPSUBSB
or
VPSUBSW
.

Syntax

extern __m256i _mm256_subs_epi8(__m256i s1, __m256i s2);
extern __m256i _mm256_subs_epi16(__m256i s1, __m256i s2);
Arguments
s1
integer source vector used for the operation
s2
integer source vector used for the operation
Description
Performs a SIMD subtract of the packed, signed, 8- or 16-bit integer data elements with saturation of the second source vector
s2
from the corresponding elements of the first source vector
s1
and stores the packed integer results in the destination vector. When an individual byte/word result is beyond the range of a signed byte/word integer (that is, greater than
7FH/7FFFH
or less than
80H/8000H
), the saturated value of
7FH/7FFFH
or
80H/8000H
, respectively, is written to the destination vector.
Returns
Result of the subtraction operation.