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Add --opt=force-aligned-memory option.

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This forces all vector loads/stores to be done assuming that the given
pointer is aligned to the vector size, thus allowing the use of sometimes
more-efficient instructions.  (If it isn't the case that the memory is
aligned, the program will fail!).
This commit is contained in:
Matt Pharr
2012-09-14 13:49:45 -07:00
parent 59b0a2b208
commit be2108260e
6 changed files with 35 additions and 8 deletions
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14
test_static.cpp
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@@ -99,15 +99,21 @@ void *ISPCAlloc(void **handle, int64_t size, int32_t alignment) {
}
#if defined(_WIN32) || defined(_WIN64)
#define ALIGN
#else
#define ALIGN __attribute__((aligned(64)))
#endif
int main(int argc, char *argv[]) {
int w = width();
assert(w <= 64);
float returned_result[64];
float vfloat[64];
double vdouble[64];
int vint[64], vint2[64];
float returned_result[64] ALIGN;
float vfloat[64] ALIGN;
double vdouble[64] ALIGN;
int vint[64] ALIGN;
int vint2[64] ALIGN;
for (int i = 0; i < 64; ++i) {
returned_result[i] = -1e20;