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llvm-svn: 28787
This commit is contained in:
Chris Lattner 2006-06-14 21:26:18 +00:00
parent cf6b3bb376
commit 20c3c42c02
1 changed files with 29 additions and 0 deletions
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29
lib/Target/X86/README-SSE.txt
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@ -664,3 +664,32 @@ e.g. SSE select using and, andnot, or. Various SSE compare translations.
//===---------------------------------------------------------------------===//
Add hooks to commute some CMPP operations.
//===---------------------------------------------------------------------===//
Implement some missing insert/extract element operations without going through
the stack. Testcase here:
CodeGen/X86/vec_ins_extract.ll
corresponds to this C code:
typedef float vectorfloat __attribute__((vector_size(16)));
void test(vectorfloat *F, float f) {
vectorfloat G = *F + *F;
*((float*)&G) = f;
*F = G + G;
}
void test2(vectorfloat *F, float f) {
vectorfloat G = *F + *F;
((float*)&G)[2] = f;
*F = G + G;
}
void test3(vectorfloat *F, float *f) {
vectorfloat G = *F + *F;
*f = ((float*)&G)[2];
}
void test4(vectorfloat *F, float *f) {
vectorfloat G = *F + *F;
*f = *((float*)&G);
}
//===---------------------------------------------------------------------===//