From 8f5e04098fe14d4a0e4da67b93ed471ba863e3e9 Mon Sep 17 00:00:00 2001
From: Johnny Chen <johnny.chen@apple.com>
Date: Fri, 19 Feb 2010 02:12:06 +0000
Subject: [PATCH] Added entries for ASR, LSL, LSR, ROR, and RRX so that the
 disassembler prints out the canonical form (A8.6.98) instead of the
 pseudo-instruction as provided via MOVs.

DBG_ARM_DISASM=YES llvm-mc -triple=arm-unknown-unknown --disassemble
0xc0 0x00 0xa0 0xe1
Opcode=29 Name=ASR Format=ARM_FORMAT_LDMISCFRM
 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
-------------------------------------------------------------------------------------------------
| 1: 1: 1: 0| 0: 0: 0: 1| 1: 0: 1: 0| 0: 0: 0: 0| 0: 0: 0: 0| 0: 0: 0: 0| 1: 1: 0: 0| 0: 0: 0: 0|
-------------------------------------------------------------------------------------------------

	asr	r0, r0, #1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96654 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMInstrInfo.td | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index da94e093a5e..59495409e6d 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -1278,6 +1278,30 @@ def MOVrx : AsI1<0b1101, (outs GPR:$dst), (ins GPR:$src), Pseudo, IIC_iMOVsi,
                  "mov", "\t$dst, $src, rrx",
                  [(set GPR:$dst, (ARMrrx GPR:$src))]>, UnaryDP;
 
+//===----------------------------------------------------------------------===//
+//  Shift Instructions.
+//
+//  These are for disassembly only.  See also MOVs above.
+
+class AShI<string opc, bits<2> type>
+  : AsI1<0b1101, (outs GPR:$dst), (ins GPR:$src, am3offset:$offset), LdMiscFrm,
+         IIC_iMOVsr, opc, "\t$dst, $src, $offset", []>, UnaryDP {
+  let Inst{6-5} = type;
+  let Inst{25} = 0;
+}
+
+def LSL : AShI<"lsl", 0b00>;
+def LSR : AShI<"lsr", 0b01>;
+def ASR : AShI<"asr", 0b10>;
+def ROR : AShI<"ror", 0b11>;
+
+def RRX : AsI1<0b1101, (outs GPR:$dst), (ins GPR:$src), LdMiscFrm, IIC_iMOVsr,
+               "rrx", "\t$dst, $src", []>, UnaryDP {
+  let Inst{25} = 0;
+  let Inst{11-7} = 0b00000;
+  let Inst{6-4} = 0b110;
+}
+
 // These aren't really mov instructions, but we have to define them this way
 // due to flag operands.