_mm_abs_epi16
Microsoft Specific
Emits the Supplemental Streaming SIMD Extensions 3 (SSSE3) instruction pabsw. This instruction returns the absolute value for each packed 16-bit integer of the 128-bit parameter.
__m128i _mm_abs_epi16(
__m128i a
);
Parameters
- [in] a
A 128-bit parameter that contains eight 16-bit signed integers for which the absolute values will be returned.
Return value
r0 := (a0 < 0) ? -a0 : a0
r1 := (a1 < 0) ? -a1 : a1
...
r7 := (a7 < 0) ? -a7 : a7
Requirements
Intrinsic |
Architecture |
|---|---|
_mm_abs_epi16 |
x86, x64 |
Header file <tmmintrin.h>
Remarks
The return value r and parameter a each consist of 128 bits. r0-r7, a0-a7 are the sequentially ordered 16-bit components of these parameters, where r0 and a0 indicate the least significant 16 bits.
Before using this intrinsic, software must ensure that the processor supports the instruction.
Example
#include <tmmintrin.h>
#include <stdio.h>
__m128i a;
int main()
{
a.m128i_i16[0] = 0;
a.m128i_i16[1] = 0;
a.m128i_i16[2] = 128;
a.m128i_i16[3] = -128;
a.m128i_i16[4] = 32767;
a.m128i_i16[5] = -32767;
a.m128i_i16[6] = 8756;
a.m128i_i16[7] = -8756;
__m128i b = _mm_abs_epi16( a );
printf_s("Original 16 bit pairs:\n%6d, %6d\n%6d, %6d\n%6d, %6d\n%6d, %6d\n\n",
a.m128i_i16[0], a.m128i_i16[1], a.m128i_i16[2], a.m128i_i16[3],
a.m128i_i16[4], a.m128i_i16[5], a.m128i_i16[6], a.m128i_i16[7]);
printf_s("New 16 bit pairs:\n%6d, %6d\n%6d, %6d\n%6d, %6d\n%6d, %6d\n",
b.m128i_i16[0], b.m128i_i16[1], b.m128i_i16[2], b.m128i_i16[3],
b.m128i_i16[4], b.m128i_i16[5], b.m128i_i16[6], b.m128i_i16[7]);
return 0;
}
Original 16 bit pairs:
0, 0
128, -128
32767, -32767
8756, -8756
New 16 bit pairs:
0, 0
128, 128
32767, 32767
8756, 8756