From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 28 Mar 2006 06:55:45 +0000 (+0000)
Subject: Update
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6a6d354d4c33e435c15a70e1f3946984ae194445;p=oota-llvm.git

Update


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27220 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 9618d9cb65c..09d9bb6ef86 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -665,26 +665,5 @@ directly %esp[0] if there are no other uses.
 
 //===---------------------------------------------------------------------===//
 
-Is it really a good idea to use movlhps to move 1 double-precision FP value from
-low quadword of source to high quadword of destination?
-
-e.g.
-
-void test2 (v2sd *b, double X, double Y) {
-  v2sd a = (v2sd) {X, X*Y};
-  *b = a;
-}
-
-	movsd 8(%esp), %xmm0
-	movapd %xmm0, %xmm1
-	mulsd 16(%esp), %xmm1
-	movlhps %xmm1, %xmm0
-	movl 4(%esp), %eax
-	movapd %xmm0, (%eax)
-	ret
-
-icc uses unpcklpd instead.
-
-//===---------------------------------------------------------------------===//
-
-Use movhps and movlhps to update upper 64-bits of a v4sf value.
+Use movhps to update upper 64-bits of a v4sf value. Also movlps on lower half
+of a v4sf value.