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| author | Chris Lattner <sabre@nondot.org> | 2006-04-11 18:47:03 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2006-04-11 18:47:03 +0000 |
| commit | 95c7570f3231660071be9becb185678df268c936 (patch) | |
| tree | 7262b77acb8d19d078e0801f5f99a7c62516ddf8 /lib | |
| parent | df3c33c57e16eb32c88bd1160fd9b6369ab23832 (diff) | |
| download | external_llvm-95c7570f3231660071be9becb185678df268c936.zip external_llvm-95c7570f3231660071be9becb185678df268c936.tar.gz external_llvm-95c7570f3231660071be9becb185678df268c936.tar.bz2 | |
we have a shuffle instr, add an example.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27592 91177308-0d34-0410-b5e6-96231b3b80d8
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 0cf7a19..7e92f0b 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 + //===----------------------------------------------------------------------===// |