_mm_abs_epi32
Microsoft Specific
Emits the Supplemental Streaming SIMD Extensions 3 (SSSE3) instruction pabsd. This instruction returns the absolute value for each packed 32-bit integer of the 128-bit parameter.
__m128i _mm_abs_epi32(
__m128i a
);
Parameters
- [in] a
A 128-bit parameter that contains four 32-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_epi32 |
x86, x64 |
Header file <tmmintrin.h>
Remarks
The return value r and parameter a each consist of 128 bits. r0-r3, a0-a3 are the sequentially ordered 32-bit components of these parameters, where r0 and a0 indicate the least significant 32 bits.
Before using this intrinsic, software must ensure that the processor supports the instruction.
Example
#include <stdio.h>
#include <tmmintrin.h>
int main()
{
__m128i a;
a.m128i_i32[0] = 0;
a.m128i_i32[1] = 0;
a.m128i_i32[2] = 2147483647;
a.m128i_i32[3] = -2147483647;
__m128i b = _mm_abs_epi32( a );
printf_s("Original 32 bit pairs:\n0x%08x, 0x%08x\n0x%08x, 0x%08x\n\n",
a.m128i_i32[0], a.m128i_i32[1], a.m128i_i32[2], a.m128i_i32[3]);
printf_s("New 32 bit pairs:\n0x%08x, 0x%08x\n0x%08x, 0x%08x\n",
b.m128i_i32[0], b.m128i_i32[1], b.m128i_i32[2], b.m128i_i32[3]);
return 0;
}
Original 32 bit pairs:
0x00000000, 0x00000000
0x7fffffff, 0x80000001
New 32 bit pairs:
0x00000000, 0x00000000
0x7fffffff, 0x7fffffff