From 913cc3072d0500667444fbfdfed6c43d431d7f3f Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Fri, 30 Mar 2012 21:54:22 +0000
Subject: [PATCH] ARM fix encoding fixup resolution for ldrd and friends.

The 8-bit payload is not contiguous in the opcode. Move the upper nibble
over 4 bits into the correct place.

rdar://11158641

llvm-svn: 153780
---
 llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
index 3ba891da4f7d..5f2138d5de99 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
@@ -469,7 +469,9 @@ static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) {
       Value = -Value;
       isAdd = false;
     }
+    // The value has the low 4 bits encoded in [3:0] and the high 4 in [11:8].
     assert ((Value < 256) && "Out of range pc-relative fixup value!");
+    Value = (Value & 0xf) | ((Value & 0xf0) << 4);
     return Value | (isAdd << 23);
   }
   case ARM::fixup_arm_pcrel_10: