| /* { dg-do compile { target { powerpc*-*-* } } } */ |
| /* { dg-skip-if "" { powerpc*-*-darwin* } } */ |
| /* { dg-require-effective-target powerpc_altivec_ok } */ |
| /* { dg-require-effective-target powerpc_fprs } */ |
| /* { dg-options "-O3 -ftree-vectorize -mdejagnu-cpu=power6 -ffast-math" } */ |
| /* { dg-final { scan-assembler-times "fmadd" 1 } } */ |
| /* { dg-final { scan-assembler-times "fmsub " 1 } } */ |
| /* { dg-final { scan-assembler-not "fmul" } } */ |
| /* { dg-final { scan-assembler-not "fadd " } } */ |
| |
| /* Check whether the common FFT idiom (a*b)+c and (a*b)-c generates two fma |
| instructions, instead of a multiply, add, and subtract. */ |
| |
| void |
| fft (double *result, double a, double b, double c) |
| { |
| result[0] = (a*b) + c; |
| result[1] = (a*b) - c; |
| } |