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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [vect/] [vect-reduc-dot-u8.c] - Rev 867
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/* { dg-require-effective-target vect_int } */ #include <stdarg.h> #include "tree-vect.h" #define N 64 #define DOT1 43680 #define DOT2 43680 #define DOT3 43680 unsigned char X[N] __attribute__ ((__aligned__(16))); unsigned char Y[N] __attribute__ ((__aligned__(16))); /* char->short->int dot product. Detected as a dot-product pattern. Should be vectorized on targets that support dot-product for unsigned chars. */ unsigned int foo1(int len) { int i; unsigned int result = 0; unsigned short prod; for (i=0; i<len; i++) { prod = X[i] * Y[i]; result += prod; } return result; } /* char->short->short dot product. Detected as a dot-product pattern. Should be vectorized on targets that support dot-product for unsigned chars. This test currently fails to vectorize on targets that support dot-product of chars only when the accumulator is int. */ unsigned short foo2(int len) { int i; unsigned short result = 0; for (i=0; i<len; i++) { result += (unsigned short)(X[i] * Y[i]); } return result; } /* char->int->int dot product. Not detected as a dot-product. Doesn't get vectorized due to presence of type converisons. */ unsigned int foo3(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 dot1, dot3; unsigned short dot2; int i; check_vect (); for (i=0; i<N; i++) { X[i] = i; Y[i] = 64-i; } dot1 = foo1 (N); if (dot1 != DOT1) abort (); dot2 = foo2 (N); if (dot2 != DOT2) abort (); dot3 = foo3 (N); if (dot3 != DOT3) abort (); return 0; } /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 2 "vect" } } */ /* When the vectorizer is enhanced to vectorize foo2 (accumulation into short) for targets that support accumulation into int (powerpc, ia64) we'd have: dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target vect_udot_qi } } */ /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { xfail *-*-* } } } */ /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_udot_qi } } } */ /* { dg-final { cleanup-tree-dump "vect" } } */
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