From a46a493c026cb60eec461f40318ce7ca7574f1b5 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Mon, 29 Nov 2010 22:15:03 +0000
Subject: [PATCH] Refactor some of the "disassembly-only" instructions into a
 base class. This reduces some code duplication.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120326 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMInstrThumb.td | 57 ++++++++++++---------------------
 1 file changed, 21 insertions(+), 36 deletions(-)

diff --git a/lib/Target/ARM/ARMInstrThumb.td b/lib/Target/ARM/ARMInstrThumb.td
index 568cbc6c6c6..5ac8b98832a 100644
--- a/lib/Target/ARM/ARMInstrThumb.td
+++ b/lib/Target/ARM/ARMInstrThumb.td
@@ -136,45 +136,41 @@ def tADJCALLSTACKDOWN :
             Requires<[IsThumb, IsThumb1Only]>;
 }
 
+class T1Disassembly<bits<2> op1, bits<8> op2>
+  : T1Encoding<0b101111> {
+  let Inst{9-8} = op1;
+  let Inst{7-0} = op2;
+}
+
 def tNOP : T1pI<(outs), (ins), NoItinerary, "nop", "",
                 [/* For disassembly only; pattern left blank */]>,
-           T1Encoding<0b101111> {
-  // A8.6.110
-  let Inst{9-8} = 0b11;
-  let Inst{7-0} = 0x00;
-} 
+           T1Disassembly<0b11, 0x00>; // A8.6.110
 
 def tYIELD : T1pI<(outs), (ins), NoItinerary, "yield", "",
                   [/* For disassembly only; pattern left blank */]>,
-             T1Encoding<0b101111> {
-  // A8.6.410
-  let Inst{9-8} = 0b11;
-  let Inst{7-0} = 0x10;
-} 
+           T1Disassembly<0b11, 0x10>; // A8.6.410
 
 def tWFE : T1pI<(outs), (ins), NoItinerary, "wfe", "",
                 [/* For disassembly only; pattern left blank */]>,
-           T1Encoding<0b101111> {
-  // A8.6.408
-  let Inst{9-8} = 0b11;
-  let Inst{7-0} = 0x20;
-} 
+           T1Disassembly<0b11, 0x20>; // A8.6.408
 
 def tWFI : T1pI<(outs), (ins), NoItinerary, "wfi", "",
                 [/* For disassembly only; pattern left blank */]>,
-           T1Encoding<0b101111> {
-  // A8.6.409
-  let Inst{9-8} = 0b11;
-  let Inst{7-0} = 0x30;
-} 
+           T1Disassembly<0b11, 0x30>; // A8.6.409
 
 def tSEV : T1pI<(outs), (ins), NoItinerary, "sev", "",
                 [/* For disassembly only; pattern left blank */]>,
-           T1Encoding<0b101111> {
-  // A8.6.157
-  let Inst{9-8} = 0b11;
-  let Inst{7-0} = 0x40;
-} 
+           T1Disassembly<0b11, 0x40>; // A8.6.157
+
+// The i32imm operand $val can be used by a debugger to store more information
+// about the breakpoint.
+def tBKPT : T1I<(outs), (ins i32imm:$val), NoItinerary, "bkpt\t$val",
+                [/* For disassembly only; pattern left blank */]>,
+           T1Disassembly<0b10, {?,?,?,?,?,?,?,?}> {
+  // A8.6.22
+  bits<8> val;
+  let Inst{7-0} = val;
+}
 
 def tSETENDBE : T1I<(outs), (ins), NoItinerary, "setend\tbe",
                     [/* For disassembly only; pattern left blank */]>,
@@ -196,17 +192,6 @@ def tSETENDLE : T1I<(outs), (ins), NoItinerary, "setend\tle",
   let Inst{2-0} = 0b000;
 }
 
-// The i32imm operand $val can be used by a debugger to store more information
-// about the breakpoint.
-def tBKPT : T1I<(outs), (ins i32imm:$val), NoItinerary, "bkpt\t$val",
-                [/* For disassembly only; pattern left blank */]>,
-            T1Encoding<0b101111> {
-  // A8.6.22
-  bits<8> val;
-  let Inst{9-8} = 0b10;
-  let Inst{7-0} = val;
-}
-
 // Change Processor State is a system instruction -- for disassembly only.
 // The singleton $opt operand contains the following information:
 // opt{4-0} = mode ==> don't care