[llvm-commits] CVS: llvm/lib/Target/X86/README.txt

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

README.txt updated: 1.77 -> 1.78
---
Log message:

Another entry about shuffles.


---
Diffs of the changes:  (+6 -0)

 README.txt |    6 ++++++
 1 files changed, 6 insertions(+)


Index: llvm/lib/Target/X86/README.txt
diff -u llvm/lib/Target/X86/README.txt:1.77 llvm/lib/Target/X86/README.txt:1.78
--- llvm/lib/Target/X86/README.txt:1.77	Tue Mar 28 00:55:45 2006
+++ llvm/lib/Target/X86/README.txt	Tue Mar 28 21:03:46 2006
@@ -667,3 +667,9 @@
 
 Use movhps to update upper 64-bits of a v4sf value. Also movlps on lower half
 of a v4sf value.
+
+//===---------------------------------------------------------------------===//
+
+Better codegen for vector_shuffles like this { x, 0, 0, 0 } or { x, 0, x, 0}.
+Perhaps use pxor / xorp* to clear a XMM register first?
+