Developer Guide and Reference

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Absolute Value Intrinsics

These Supplemental Streaming SIMD Extensions 3 (SSSE3) intrinsics are used to compute absolute values. The prototypes for these intrinsics are in
tmmintrin.h
.
To use these intrinsics, include the
immintrin.h
file as follows:
#include <immintrin.h>

_mm_abs_epi8

extern __m128i _mm_abs_epi8(__m128i a);
Computes absolute value of signed bytes. Interpreting
a
and
r
as arrays of signed 8-bit integers:
for (i = 0; i < 16; i++) { r[i] = abs(a[i]); }

_mm_abs_epi16

extern __m128i _mm_abs_epi16(__m128i a);
Computes absolute value of signed words. Interpreting
a
and
r
as arrays of signed 16-bit integers:
for (i = 0; i < 8; i++) { r[i] = abs(a[i]); }

_mm_abs_epi32

extern __m128i _mm_abs_epi32(__m128i a);
Computes absolute value of signed doublewords. Interpreting
a
and
r
as arrays of signed 32-bit integers:
for (i = 0; i < 4; i++) { r[i] = abs(a[i]); }

_mm_abs_pi8

extern __m64 _mm_abs_pi8(__m64 a);
Computes absolute value of signed bytes. Interpreting
a
and
r
as arrays of signed 8-bit integers:
for (i = 0; i < 8; i++) { r[i] = abs(a[i]); }

_mm_abs_pi16

extern __m64 _mm_abs_pi16(__m64 a);
Computes absolute value of signed words. Interpreting