_mm_mulhrs_pi16
Visual Studio 2010
Microsoft Specific
Emits the Supplemental Streaming SIMD Extensions 3 (SSSE3) instruction pmulhrsw. This instruction multiplies two sets of 16-bit integers.
__m64 _mm_mulhrs_pi16( __m64 a, __m64 b );
#include <stdio.h>
#include <tmmintrin.h>
int main ()
{
__m64 a, b, final;
a.m64_i16[0] = -0x5CEE;
a.m64_i16[1] = 0x0105;
a.m64_i16[2] = 0x3DA9;
a.m64_i16[3] = -0x7FFF;
b.m64_i16[0] = 0x4000;
b.m64_i16[1] = -0x510A;
b.m64_i16[2] = 0x209D;
b.m64_i16[3] = -0x7FFF;
for (int index = 0; index < 4; index++)
{
final.m64_i16[index] = ((a.m64_i16[index] * b.m64_i16[index]) + 0x4000) >> 15;
}
__m64 res = _mm_mulhrs_pi16(a, b);
printf_s("Res0 should be %d: %d\nRes1 should be %d: %d\n",
final.m64_i16[0], res.m64_i16[0],
final.m64_i16[1], res.m64_i16[1]);
printf_s("Res2 should be %d: %d\nRes3 should be %d: %d\n",
final.m64_i16[2], res.m64_i16[2],
final.m64_i16[3], res.m64_i16[3]);
_mm_empty();
return 0;
}
Res0 should be -11895: -11895 Res1 should be -165: -165 Res2 should be 4022: 4022 Res3 should be 32766: 32766
