More refactoring.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55528 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 55 insertions, 0 deletions

diff --git a/lib/Target/ARM/ARMInstrFormats.td b/lib/Target/ARM/ARMInstrFormats.td
index b1a7715..9ea6157 100644
--- a/lib/Target/ARM/ARMInstrFormats.td
+++ b/lib/Target/ARM/ARMInstrFormats.td
@@ -226,3 +226,58 @@ class ARMV5TEPat<dag pattern, dag result> : Pat<pattern, result> {
 class ARMV6Pat<dag pattern, dag result> : Pat<pattern, result> {
   list<Predicate> Predicates = [IsARM, HasV6];
 }
+
+//===----------------------------------------------------------------------===//
+//
+// Thumb Instruction Format Definitions.
+//
+
+
+// TI - Thumb instruction.
+
+class ThumbI<dag outs, dag ins, AddrMode am, SizeFlagVal sz,
+             string asm, string cstr, list<dag> pattern>
+  // FIXME: Set all opcodes to 0 for now.
+  : InstARM<0, am, sz, IndexModeNone, ThumbFrm, cstr> {
+  let OutOperandList = outs;
+  let InOperandList = ins;
+  let AsmString   = asm;
+  let Pattern = pattern;
+  list<Predicate> Predicates = [IsThumb];
+}
+
+class TI<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeNone, Size2Bytes, asm, "", pattern>;
+class TI1<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeT1, Size2Bytes, asm, "", pattern>;
+class TI2<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeT2, Size2Bytes, asm, "", pattern>;
+class TI4<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeT4, Size2Bytes, asm, "", pattern>;
+class TIs<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeTs, Size2Bytes, asm, "", pattern>;
+
+// Two-address instructions
+class TIt<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeNone, Size2Bytes, asm, "$lhs = $dst", pattern>;
+
+// BL, BLX(1) are translated by assembler into two instructions
+class TIx2<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeNone, Size4Bytes, asm, "", pattern>;
+
+// BR_JT instructions
+class TJTI<dag outs, dag ins, string asm, list<dag> pattern>
+  : ThumbI<outs, ins, AddrModeNone, SizeSpecial, asm, "", pattern>;
+
+
+//===----------------------------------------------------------------------===//
+
+
+// ThumbPat - Same as Pat<>, but requires that the compiler be in Thumb mode.
+class ThumbPat<dag pattern, dag result> : Pat<pattern, result> {
+  list<Predicate> Predicates = [IsThumb];
+}
+
+class ThumbV5Pat<dag pattern, dag result> : Pat<pattern, result> {
+  list<Predicate> Predicates = [IsThumb, HasV5T];
+}