Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/vect/vect-reduc-sad.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children | 1830386684a0 |
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/* { dg-require-effective-target vect_usad_char } */ #include <stdarg.h> #include "tree-vect.h" #define N 64 #define SAD N*N/2 unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))); unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))); int abs (int); /* Sum of absolute differences between arrays of unsigned char types. Detected as a sad pattern. Vectorized on targets that support sad for unsigned chars. */ __attribute__ ((noinline)) int foo (int len) { int i; int result = 0; for (i = 0; i < len; i++) result += abs (X[i] - Y[i]); return result; } int main (void) { int i; int sad; check_vect (); for (i = 0; i < N; i++) { X[i] = i; Y[i] = N - i; __asm__ volatile (""); } sad = foo (N); if (sad != SAD) abort (); return 0; } /* { dg-final { scan-tree-dump-times "vect_recog_sad_pattern: detected" 1 "vect" } } */ /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */