__m64_mux1
Visual Studio 2010
Microsoft Specific
Emits the IPF instruction mux1, the 1-byte form of the mux instruction, which is used to arrange bytes in a particular pattern specified by the second parameter.
__m64 __m64_mux1( __m64 source, const int permutation );
The available patterns are specified in the following table.
Permutation | Operation | Description |
|---|---|---|
0x0 | @brcst | Copy the least significant byte to all bytes of the result. |
0x8 | @mix | Perform a Mix operation on the two halves of the source. |
0x9 | @shuf | Perform a Shuffle operation on the two halves of the source. |
0xA | @alt | Perform an Alternate operation on the two halves of the source. |
0xB | @rev | Reverse the order of the bytes. |
// mux1.cpp
// processor: IPF
#include <stdio.h>
#include <intrin.h>
#include <memory.h>
#pragma intrinsic(__m64_mux1)
void m64tochararray(__m64 m64, char* c)
{
for (int j = 0; j < 8; j++)
c[j] = m64.m64_i8[j];
}
void chararraytom64(const char* c, __m64* pm64)
{
for (int j = 0; j < 8; j++)
pm64->m64_i8[j] = c[j];
}
int main()
{
char s1[9] = "01234567";
char s2[9];
__m64 m, result;
printf_s("Source string: %s\n", s1);
memset(s2, 0, 9);
chararraytom64(s1, &m);
result = __m64_mux1(m, 0); // @brcst form
m64tochararray(result, s2);
printf_s("mux1 @brcst (0x0) form: %s\n", s2);
memset(s2, 0, 9);
chararraytom64(s1, &m);
result = __m64_mux1(m, 8); // @mix form
m64tochararray(result, s2);
printf_s("mux1 @mix (0x8) form: %s\n", s2);
memset(s2, 0, 9);
chararraytom64(s1, &m);
result = __m64_mux1(m, 9); // @shuf form
m64tochararray(result, s2);
printf_s("mux1 @shuf (0x9) form: %s\n", s2);
memset(s2, 0, 9);
chararraytom64(s1, &m);
result = __m64_mux1(m, 0xA); // @alt form
m64tochararray(result, s2);
printf_s("mux1 @alt (0xA) form: %s\n", s2);
memset(s2, 0, 9);
chararraytom64(s1, &m);
result = __m64_mux1(m, 0xB); // @rev form
m64tochararray(result, s2);
printf_s("mux1 @rev (0xB) form: %s\n", s2);
}
Source string: 01234567 mux1 @brcst (0x0) form: 00000000 mux1 @mix (0x8) form: 04261537 mux1 @shuf (0x9) form: 04152637 mux1 @alt (0xA) form: 02461357 mux1 @rev (0xB) form: 76543210
