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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u8b.c | |
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Diffstat (limited to 'gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u8b.c')
-rw-r--r-- | gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u8b.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u8b.c b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u8b.c new file mode 100644 index 000000000..01c82b52c --- /dev/null +++ b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u8b.c @@ -0,0 +1,55 @@ +/* { dg-require-effective-target vect_int } */ + +#include <stdarg.h> +#include "tree-vect.h" + +#define N 64 + +#define DOT 43680 + +unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63}; +unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1}; + +/* char->short->short dot product. + Detected as a dot-product pattern. + Should be vectorized on targets that support dot-product for unsigned chars, + but currently this test cannot be vectorized as a dot-product on targets + that support char->short->int dot-product. + Alternatively, this test can be vectorized using vect_widen_mult_qi (or + vect_unpack and non-widening multplication: vect_unpack && vect_short_mult). + */ +__attribute__ ((noinline)) unsigned short +foo (int len) { + int i; + unsigned short result = 0; + + for (i=0; i<len; i++) { + result += (unsigned short)(X[i] * Y[i]); + } + return result; +} + +int main (void) +{ + unsigned short dot; + int i; + + check_vect (); + + dot = foo (N); + if (dot != DOT) + abort (); + + return 0; +} + +/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */ + +/* When the vectorizer is enhanced to vectorize accumulation into short for + targets that support accumulation into int (powerpc, ia64) we'd have: +dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_udot_qi || vect_widen_mult_qi_to_hi } } +*/ +/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" {target { vect_widen_mult_qi_to_hi || vect_unpack } } } } */ + +/* { dg-final { cleanup-tree-dump "vect" } } */ + |