_mm_max_epu16
Microsoft Specific
Emits the Streaming SIMD Extensions 4 (SSE4) instruction pmaxuw. This instruction chooses the larger value of the two parameters.
__m128i _mm_max_epu16(
__m128i a,
__m128i b
);
Parameters
[in] a
A 128-bit parameter that contains eight 16-bit unsigned integers.[in] b
A 128-bit parameter that contains eight 16-bit unsigned integers.
Return value
A 128-bit parameter that can be defined with the following equations:
r0 := (a0 > b0) ? a0 : b0
r1 := (a1 > b1) ? a1 : b1
...
r7 := (a7 > b7) ? a7 : b7
Requirements
Intrinsic |
Architecture |
|---|---|
_mm_max_epu16 |
x86, x64 |
Header file <smmintrin.h>
Remarks
r0-r7, a0-a7, and b0-b7 are the sequentially ordered 16-bit components of return value r and parameters a and b. r0, a0, and b0 are the least significant 16 bits.
Before you use this intrinsic, software must ensure that the processor supports the instruction.
Example
#include <stdio.h>
#include <smmintrin.h>
int main ()
{
__m128i a, b;
a.m128i_u16[0] = 65535;
a.m128i_u16[1] = 128;
a.m128i_u16[2] = 128;
a.m128i_u16[3] = 128;
a.m128i_u16[4] = 17;
a.m128i_u16[5] = 39000;
a.m128i_u16[6] = 40000;
a.m128i_u16[7] = 0;
b.m128i_u16[0] = 65534;
b.m128i_u16[1] = 0;
b.m128i_u16[2] = 128;
b.m128i_u16[3] = 129;
b.m128i_u16[4] = 5740;
b.m128i_u16[5] = 1;
b.m128i_u16[6] = 45000;
b.m128i_u16[7] = 0;
__m128i res = _mm_max_epu16(a, b);
printf_s(" a\t b\t res\n%5d\t%5d\t%5d\n%5d\t%5d\t%5d\n",
a.m128i_u16[0], b.m128i_u16[0], res.m128i_u16[0],
a.m128i_u16[1], b.m128i_u16[1], res.m128i_u16[1]);
printf_s("%5d\t%5d\t%5d\n%5d\t%5d\t%5d\n%5d\t%5d\t%5d\n%5d\t%5d\t%5d\n",
a.m128i_u16[2], b.m128i_u16[2], res.m128i_u16[2],
a.m128i_u16[3], b.m128i_u16[3], res.m128i_u16[3],
a.m128i_u16[4], b.m128i_u16[4], res.m128i_u16[4],
a.m128i_u16[5], b.m128i_u16[5], res.m128i_u16[5]);
printf_s("%5d\t%5d\t%5d\n%5d\t%5d\t%5d\n",
a.m128i_u16[6], b.m128i_u16[6], res.m128i_u16[6],
a.m128i_u16[7], b.m128i_u16[7], res.m128i_u16[7]);
return 0;
}
a b res
65535 65534 65535
128 0 128
128 128 128
128 129 129
17 5740 5740
39000 1 39000
40000 45000 45000
0 0 0