| /* { dg-do compile } */ |
| /* { dg-require-effective-target powerpc_p9vector_ok } */ |
| /* { dg-options "-O3 -mdejagnu-cpu=power9" } */ |
| |
| /* Verify that we vectorize this SAD loop using vabsdub. */ |
| |
| extern int abs (int __x) __attribute__ ((__nothrow__, __leaf__)) __attribute__ ((__const__)); |
| |
| static int |
| foo (unsigned char *w, int i, unsigned char *x, int j) |
| { |
| int tot = 0; |
| for (int a = 0; a < 16; a++) |
| { |
| for (int b = 0; b < 16; b++) |
| tot += abs (w[b] - x[b]); |
| w += i; |
| x += j; |
| } |
| return tot; |
| } |
| |
| void |
| bar (unsigned char *w, unsigned char *x, int i, int *result) |
| { |
| *result = foo (w, 16, x, i); |
| } |
| |
| /* { dg-final { scan-assembler-times "vabsdub" 16 } } */ |
| /* { dg-final { scan-assembler-times "vsum4ubs" 16 } } */ |
| /* { dg-final { scan-assembler-times "vadduwm" 17 } } */ |
| |
| /* Note: One of the 16 adds is optimized out (add with zero), |
| leaving 15. The extra two adds are for the final reduction. */ |
