387-9.c

来自「用于进行gcc测试」· C语言 代码 · 共 37 行

/* Verify that 387 fsincos instruction is generated.  */
/* { dg-do compile } */
/* { dg-require-effective-target ilp32 } */
/* { dg-options "-O -funsafe-math-optimizations -march=i686" } */

extern double sin (double);
extern double cos (double);
extern void sincos (double, double *, double *);

double f1(double x)
{
  double s, c;
  sincos (x, &s, &c);
  return s + c;
}

double f2(double x)
{
  double s, c, tmp;
  sincos (x, &s, &tmp);
  c = cos (x);
  return s + c;
}

double f3(double x)
{
  double s, c, tmp;
  sincos (x, &tmp, &c);
  s = sin (x);
  return s + c;
}

/* { dg-final { scan-assembler "fsincos" } } */
/* { dg-final { scan-assembler-not "fsin " } } */
/* { dg-final { scan-assembler-not "fcos" } } */
/* { dg-final { scan-assembler-not "call" } } */