i386-cmov2.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 10 行

/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-O2 -march=k8" } */
/* { dg-final { scan-assembler "sbb" } } */

/* This conditional move is fastest to be done using sbb.  */
t(unsigned int a, unsigned int b)
{
  return (a<=b?5:-5);
}