Viewing file:  fma4-fma-2.c (1.28 KB) -rw-r--r--
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/* Test that the compiler properly optimizes floating point multiply
and add instructions into vfmaddss, vfmsubss, vfnmaddss,
vfnmsubss on FMA4 systems. */
/* { dg-do compile { target { ! ia32 } } } */
/* { dg-options "-O2 -funsafe-math-optimizations -mfma4 -mno-fma" } */
extern void exit (int);
float
flt_mul_add (float a, float c)
{
return (a * a) + c;
}
double
dbl_mul_add (double a, double c)
{
return (a * a) + c;
}
float
flt_mul_sub (float a, float c)
{
return (a * a) - c;
}
double
dbl_mul_sub (double a, double c)
{
return (a * a) - c;
}
float
flt_neg_mul_add (float a, float c)
{
return (-(a * a)) + c;
}
double
dbl_neg_mul_add (double a, double c)
{
return (-(a * a)) + c;
}
float f[10] = { 2, 3, 4 };
double d[10] = { 2, 3, 4 };
int main ()
{
f[3] = flt_mul_add (f[0], f[2]);
f[4] = flt_mul_sub (f[0], f[2]);
f[5] = flt_neg_mul_add (f[0], f[2]);
d[3] = dbl_mul_add (d[0], d[2]);
d[4] = dbl_mul_sub (d[0], d[2]);
d[5] = dbl_neg_mul_add (d[0], d[2]);
exit (0);
}
/* { dg-final { scan-assembler "vfmaddss" } } */
/* { dg-final { scan-assembler "vfmaddsd" } } */
/* { dg-final { scan-assembler "vfmsubss" } } */
/* { dg-final { scan-assembler "vfmsubsd" } } */
/* { dg-final { scan-assembler "vfnmaddss" } } */
/* { dg-final { scan-assembler "vfnmaddsd" } } */
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