| /* { dg-do run } */ |
| /* { dg-require-effective-target fma } */ |
| /* { dg-options "-O3 -mfma -save-temps" } */ |
| |
| #include "fma-check.h" |
| |
| void __attribute__((noipa)) |
| check_fmaddsub (double * __restrict a, double *b, double *c, int n) |
| { |
| for (int i = 0; i < n; ++i) |
| { |
| a[2*i + 0] = b[2*i + 0] * c[2*i + 0] - a[2*i + 0]; |
| a[2*i + 1] = b[2*i + 1] * c[2*i + 1] + a[2*i + 1]; |
| } |
| } |
| |
| static void |
| fma_test (void) |
| { |
| double a[4], b[4], c[4]; |
| for (int i = 0; i < 4; ++i) |
| { |
| a[i] = i; |
| b[i] = 3*i; |
| c[i] = 7*i; |
| } |
| check_fmaddsub (a, b, c, 2); |
| const double d[4] = { 0., 22., 82., 192. }; |
| for (int i = 0; i < 4; ++i) |
| if (a[i] != d[i]) |
| __builtin_abort (); |
| } |
| |
| /* { dg-final { scan-assembler "fmaddsub...pd" } } */ |
