From 95c7570f3231660071be9becb185678df268c936 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 11 Apr 2006 18:47:03 +0000 Subject: [PATCH] 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 --- lib/Target/PowerPC/README_ALTIVEC.txt | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/lib/Target/PowerPC/README_ALTIVEC.txt b/lib/Target/PowerPC/README_ALTIVEC.txt index 0cf7a194093..7e92f0b7888 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 + //===----------------------------------------------------------------------===// -- 2.34.1