mpcmpgtw.gml

来自「开放源码的编译器open watcom 1.6.0版的源代码」· GML 代码 · 共 48 行

.func _m_pcmpgtw
#include <mmintrin.h>
__m64 _m_pcmpgtw(__m64 *m1, __m64 *m2);
.funcend
.desc begin
If the respective signed words of
.arg m1
are greater than the respective signed words of
.arg m2,
the respective words of the result are set to all ones, otherwise they
are set to all zeros.
.desc end
.return begin
The result of comparing the 16-bit packed signed words of two 64-bit
multimedia values is returned as a sequence of words (0xffff for
greater than, 0x0000 for not greater than).
.return end
.see begin
.im seemmcmp &function.
.see end
.exmp begin
#include <stdio.h>
#include <mmintrin.h>

#define AS_WORDS "%4.4x %4.4x %4.4x %4.4x"
.exmp break
__m64   a;
__m64   b = { 0x0005000300020001 };
__m64   c = { 0x0004ff8000800001 };

void main()
  {
    a = _m_pcmpgtw( b, c );
    printf( "m1="AS_WORDS"\n"
            "m2="AS_WORDS"\n"
            "mm="AS_WORDS"\n",
        b._16[3], b._16[2], b._16[1], b._16[0],
        c._16[3], c._16[2], c._16[1], c._16[0],
        a._16[3], a._16[2], a._16[1], a._16[0] );
  }
.exmp output
m1=0005 0003 0002 0001
m2=0004 ff80 0080 0001
mm=ffff ffff 0000 0000
.exmp end
.class Intel
.system