_mm_abs_pi16
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 64-bit parameter.
__m64 _mm_abs_pi16(
__m64 a
);
Parameters
- [in] a
A 64-bit parameter that contains four 16-bit signed integers for which the absolute values will be returned.
Return value
r0 := (a0 < 0) ? -a0 : a0
r1 := (a1 < 0) ? -a1 : a1
r2 := (a2 < 0) ? -a2 : a2
r3 := (a3 < 0) ? -a3 : a3
Requirements
Intrinsic |
Architecture |
|---|---|
_mm_abs_pi16 |
x86, x64 |
Header file <tmmintrin.h>
Remarks
The return value r and parameter a each consist of 64 bits. r0-r3, a0-a3 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 <stdio.h>
#include <tmmintrin.h>
int main () {
__m64 a;
a.m64_i16[0] = 0;
a.m64_i16[1] = 0;
a.m64_i16[2] = 32767;
a.m64_i16[3] = -32767;
__m64 b = _mm_abs_pi16( a );
printf_s("Original 16 bit pairs:\n%6d, %6d\n%6d, %6d\n\n",
a.m64_i16[0], a.m64_i16[1], a.m64_i16[2], a.m64_i16[3]);
printf_s("New 16 bit pairs:\n%6d, %6d\n%6d, %6d\n",
b.m64_i16[0], b.m64_i16[1], b.m64_i16[2], b.m64_i16[3]);
_mm_empty();
return 0;
}
Original 16 bit pairs:
0, 0
32767, -32767
New 16 bit pairs:
0, 0
32767, 32767