Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u16b.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_int } */ #include <stdarg.h> #include "tree-vect.h" #define N 64 #define DOT2 43680 unsigned short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))); unsigned short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))); /* ushort->int->uint dot product: the multiplication promotes the ushorts to int, and then the product is converted to uint for the addition. */ __attribute__ ((noinline)) unsigned int foo2(int len) { int i; unsigned int result = 0; for (i=0; i<len; i++) { result += (X[i] * Y[i]); } return result; } int main (void) { unsigned int dot2; int i; check_vect (); for (i=0; i<N; i++) { X[i] = i; Y[i] = 64-i; __asm__ volatile (""); } dot2 = foo2 (N); if (dot2 != DOT2) abort (); return 0; } /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */ /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_pack_trunc || vect_udot_hi } } } } */