mpcmpgtd.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_pcmpgtd
#include <mmintrin.h>
__m64 _m_pcmpgtd(__m64 *m1, __m64 *m2);
.funcend
.desc begin
If the respective signed double-words of
.arg m1
are greater than the respective signed double-words of
.arg m2,
the respective double-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 32-bit packed signed double-words of two
64-bit multimedia values is returned as a sequence of double-words
(0xffffffff for greater than, 0x00000000 for not greater than).
.return end
.see begin
.im seemmcmp &function.
.see end
.exmp begin
#include <stdio.h>
#include <mmintrin.h>

#define AS_DWORDS "%8.8lx %8.8lx"
.exmp break
__m64   a;
__m64   b = { 0x0004000400020001 };
__m64   c = { 0x000400030080007f };

void main()
  {
    a = _m_pcmpgtd( b, c );
    printf( "m1="AS_DWORDS"\n"
            "m2="AS_DWORDS"\n"
            "mm="AS_DWORDS"\n",
        b._32[1], b._32[0],
        c._32[1], c._32[0],
        a._32[1], a._32[0] );
  }
.exmp output
m1=00040004 00020001
m2=00040003 0080007f
mm=ffffffff 00000000
.exmp end
.class Intel
.system