diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/PowerPC/README_ALTIVEC.txt | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/Target/PowerPC/README_ALTIVEC.txt b/lib/Target/PowerPC/README_ALTIVEC.txt index 0cf7a19409..7e92f0b788 100644 --- a/lib/Target/PowerPC/README_ALTIVEC.txt +++ b/lib/Target/PowerPC/README_ALTIVEC.txt @@ -96,11 +96,6 @@ instructions. //===----------------------------------------------------------------------===// -We need an LLVM 'shuffle' instruction, that corresponds to the VECTOR_SHUFFLE -node. - -//===----------------------------------------------------------------------===// - We need a way to teach tblgen that some operands of an intrinsic are required to be constants. The verifier should enforce this constraint. @@ -133,4 +128,10 @@ There are a wide variety of vector_shuffle operations that we can do with a pair of instructions (e.g. a vsldoi + vpkuhum). We should pattern match these, but there are a huge number of these. +Specific examples: + +C = vector_shuffle A, B, <0, 1, 2, 4> +-> t = vsldoi A, A, 12 +-> C = vsldoi A, B, 4 + //===----------------------------------------------------------------------===// |