From d86609fca46ac9e186557d2d7b12f029febecf0e Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Tue, 5 Oct 2010 18:14:55 +0000
Subject: [PATCH] Increase the number of bits used internally by the ARM target
 to represent the addressing mode from four to five.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115645 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMBaseInstrInfo.h | 14 +++++++-------
 lib/Target/ARM/ARMInstrFormats.td | 18 +++++++++---------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/lib/Target/ARM/ARMBaseInstrInfo.h b/lib/Target/ARM/ARMBaseInstrInfo.h
index fbe5fe83eb7..c0b13b340b5 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.h
+++ b/lib/Target/ARM/ARMBaseInstrInfo.h
@@ -33,7 +33,7 @@ namespace ARMII {
     //===------------------------------------------------------------------===//
     // This four-bit field describes the addressing mode used.
 
-    AddrModeMask  = 0xf,
+    AddrModeMask  = 0x1f,
     AddrModeNone    = 0,
     AddrMode1       = 1,
     AddrMode2       = 2,
@@ -52,7 +52,7 @@ namespace ARMII {
     AddrModeT2_i8s4 = 15, // i8 * 4
 
     // Size* - Flags to keep track of the size of an instruction.
-    SizeShift     = 4,
+    SizeShift     = 5,
     SizeMask      = 7 << SizeShift,
     SizeSpecial   = 1,   // 0 byte pseudo or special case.
     Size8Bytes    = 2,
@@ -61,7 +61,7 @@ namespace ARMII {
 
     // IndexMode - Unindex, pre-indexed, or post-indexed are valid for load
     // and store ops only.  Generic "updating" flag is used for ld/st multiple.
-    IndexModeShift = 7,
+    IndexModeShift = 8,
     IndexModeMask  = 3 << IndexModeShift,
     IndexModePre   = 1,
     IndexModePost  = 2,
@@ -70,7 +70,7 @@ namespace ARMII {
     //===------------------------------------------------------------------===//
     // Instruction encoding formats.
     //
-    FormShift     = 9,
+    FormShift     = 10,
     FormMask      = 0x3f << FormShift,
 
     // Pseudo instructions
@@ -143,15 +143,15 @@ namespace ARMII {
 
     // UnaryDP - Indicates this is a unary data processing instruction, i.e.
     // it doesn't have a Rn operand.
-    UnaryDP       = 1 << 15,
+    UnaryDP       = 1 << 16,
 
     // Xform16Bit - Indicates this Thumb2 instruction may be transformed into
     // a 16-bit Thumb instruction if certain conditions are met.
-    Xform16Bit    = 1 << 16,
+    Xform16Bit    = 1 << 17,
 
     //===------------------------------------------------------------------===//
     // Code domain.
-    DomainShift   = 17,
+    DomainShift   = 18,
     DomainMask    = 3 << DomainShift,
     DomainGeneral = 0 << DomainShift,
     DomainVFP     = 1 << DomainShift,
diff --git a/lib/Target/ARM/ARMInstrFormats.td b/lib/Target/ARM/ARMInstrFormats.td
index 7c25ae99b90..66982e9a168 100644
--- a/lib/Target/ARM/ARMInstrFormats.td
+++ b/lib/Target/ARM/ARMInstrFormats.td
@@ -85,8 +85,8 @@ class Xform16Bit { bit canXformTo16Bit = 1; }
 //
 
 // Addressing mode.
-class AddrMode<bits<4> val> {
-  bits<4> Value = val;
+class AddrMode<bits<5> val> {
+  bits<5> Value = val;
 }
 def AddrModeNone    : AddrMode<0>;
 def AddrMode1       : AddrMode<1>;
@@ -199,13 +199,13 @@ class InstTemplate<AddrMode am, SizeFlagVal sz, IndexMode im,
   bit canXformTo16Bit = 0;
 
   // The layout of TSFlags should be kept in sync with ARMBaseInstrInfo.h.
-  let TSFlags{3-0}   = AM.Value;
-  let TSFlags{6-4}   = SZ.Value;
-  let TSFlags{8-7}   = IndexModeBits;
-  let TSFlags{14-9}  = Form;
-  let TSFlags{15}    = isUnaryDataProc;
-  let TSFlags{16}    = canXformTo16Bit;
-  let TSFlags{18-17} = D.Value;
+  let TSFlags{4-0}   = AM.Value;
+  let TSFlags{7-5}   = SZ.Value;
+  let TSFlags{9-8}   = IndexModeBits;
+  let TSFlags{15-10} = Form;
+  let TSFlags{16}    = isUnaryDataProc;
+  let TSFlags{17}    = canXformTo16Bit;
+  let TSFlags{19-18} = D.Value;
 
   let Constraints = cstr;
   let Itinerary = itin;
-- 
2.34.1