From f9bae438aa5dce85685de670702250bb930dfc49 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 8 Dec 2006 02:01:32 +0000
Subject: [PATCH] add a note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32347 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/README.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index 422d0216551..c04e06fbfe0 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -303,6 +303,16 @@ unsigned int swap_32(unsigned int v) {
   return v;
 }
 
+Nor is this (yes, it really is bswap):
+
+unsigned long reverse(unsigned v) {
+    unsigned t;
+    t = v ^ ((v << 16) | (v >> 16));
+    t &= ~0xff0000;
+    v = (v << 24) | (v >> 8);
+    return v ^ (t >> 8);
+}
+
 //===---------------------------------------------------------------------===//
 
 These should turn into single 16-bit (unaligned?) loads on little/big endian