i386-387-8.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 15 行

/* Verify that 387 fptan instruction is generated. Also check fptan
   peephole2 optimizer.  */
/* { dg-do compile { target "i?86-*-*" } } */
/* { dg-options "-O2 -ffast-math -march=i686" } */
/* { dg-final { scan-assembler "fptan" } } */
/* { dg-final { scan-assembler-not "fld1" } } */

extern double tan (double);

double f1(double x)
{
  return 1.0 / tan(x);
}