commit d86261ed72e4fb294f602e1831306612291b0f24
author Elliott Hughes <enh@google.com> Wed Apr 11 11:23:23 2012 -0700
committer Elliott Hughes <enh@google.com> Wed Apr 11 11:23:23 2012 -0700
tree 822900e7da746a64747e0d829ee938eccc516814
parent 61a9c617f9690b0132580efa2062de88845450dd

Sign-extend ARM B targets.

Examples:

            0x60cdd7c4: 1a00000b    bne     44 (0x60cdd7f8)

            0x60cdd804: eaffffef    b       -68 (0x60cdd7c8)

Change-Id: Id8c895dcd6153654975e652fa28638a15e00b538

src/disassembler_arm.cc

diff --git a/src/disassembler_arm.cc b/src/disassembler_arm.cc
index 2baf02c..4726c63 100644
--- a/src/disassembler_arm.cc
+++ b/src/disassembler_arm.cc
@@ -251,7 +251,8 @@
       {
         bool bl = (instruction & (1 << 24)) != 0;
         opcode = (bl ? "bl" : "b");
-        uint32_t imm32 = (instruction & 0xffffff) << 2;
+        int32_t imm26 = (instruction & 0xffffff) << 2;
+        int32_t imm32 = (imm26 << 6) >> 6; // Sign extend.
         DumpBranchTarget(args, instr_ptr + 8, imm32);
       }
       break;