From 8e719fac46c3c79dedfde86bf439819444223537 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Fri, 21 Dec 2012 22:46:07 +0000
Subject: [PATCH] [mips] Refactor LUI instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170944 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/Mips64InstrInfo.td  |  2 +-
 lib/Target/Mips/MipsInstrFormats.td | 12 ++++++++++++
 lib/Target/Mips/MipsInstrInfo.td    |  9 ++++-----
 3 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/lib/Target/Mips/Mips64InstrInfo.td b/lib/Target/Mips/Mips64InstrInfo.td
index b2a0d07b6c0..c37f61862b3 100644
--- a/lib/Target/Mips/Mips64InstrInfo.td
+++ b/lib/Target/Mips/Mips64InstrInfo.td
@@ -94,7 +94,7 @@ def ORi64   : ArithLogicI<"ori", uimm16_64, CPU64Regs, immZExt16, or>,
               ADDI_FM<0xd>;
 def XORi64  : ArithLogicI<"xori", uimm16_64, CPU64Regs, immZExt16, xor>,
               ADDI_FM<0xe>;
-def LUi64   : LoadUpper<0x0f, "lui", CPU64Regs, uimm16_64>;
+def LUi64   : LoadUpper<"lui", CPU64Regs, uimm16_64>, LUI_FM;
 
 /// Arithmetic Instructions (3-Operand, R-Type)
 def DADD   : ArithLogicR<"dadd", CPU64Regs>, ADD_FM<0, 0x2c>;
diff --git a/lib/Target/Mips/MipsInstrFormats.td b/lib/Target/Mips/MipsInstrFormats.td
index 8dad6c222b8..c20c8bdb995 100644
--- a/lib/Target/Mips/MipsInstrFormats.td
+++ b/lib/Target/Mips/MipsInstrFormats.td
@@ -356,6 +356,18 @@ class CLO_FM<bits<6> funct> {
   let rt = rd;
 }
 
+class LUI_FM {
+  bits<5> rt;
+  bits<16> imm16;
+
+  bits<32> Inst;
+
+  let Inst{31-26} = 0xf;
+  let Inst{25-21} = 0;
+  let Inst{20-16} = rt;
+  let Inst{15-0}  = imm16;
+}
+
 //===----------------------------------------------------------------------===//
 //
 //  FLOATING POINT INSTRUCTION FORMATS
diff --git a/lib/Target/Mips/MipsInstrInfo.td b/lib/Target/Mips/MipsInstrInfo.td
index 6d33bdf0136..07e4abd519f 100644
--- a/lib/Target/Mips/MipsInstrInfo.td
+++ b/lib/Target/Mips/MipsInstrInfo.td
@@ -388,10 +388,9 @@ class shift_rotate_reg<string opstr, SDNode OpNode, RegisterClass RC>:
          [(set RC:$rd, (OpNode RC:$rt, CPURegs:$rs))], IIAlu, FrmR>;
 
 // Load Upper Imediate
-class LoadUpper<bits<6> op, string instr_asm, RegisterClass RC, Operand Imm>:
-  FI<op, (outs RC:$rt), (ins Imm:$imm16),
-     !strconcat(instr_asm, "\t$rt, $imm16"), [], IIAlu>, IsAsCheapAsAMove {
-  let rs = 0;
+class LoadUpper<string opstr, RegisterClass RC, Operand Imm>:
+  InstSE<(outs RC:$rt), (ins Imm:$imm16), !strconcat(opstr, "\t$rt, $imm16"),
+         [], IIAlu, FrmI>, IsAsCheapAsAMove {
   let neverHasSideEffects = 1;
   let isReMaterializable = 1;
 }
@@ -846,7 +845,7 @@ def SLTiu : SetCC_I<"sltiu", setult, simm16, immSExt16, CPURegs>, SLTI_FM<0xb>;
 def ANDi  : ArithLogicI<"andi", uimm16, CPURegs, immZExt16, and>, ADDI_FM<0xc>;
 def ORi   : ArithLogicI<"ori", uimm16, CPURegs, immZExt16, or>, ADDI_FM<0xd>;
 def XORi  : ArithLogicI<"xori", uimm16, CPURegs, immZExt16, xor>, ADDI_FM<0xe>;
-def LUi   : LoadUpper<0x0f, "lui", CPURegs, uimm16>;
+def LUi   : LoadUpper<"lui", CPURegs, uimm16>, LUI_FM;
 
 /// Arithmetic Instructions (3-Operand, R-Type)
 def ADDu : ArithLogicR<"addu", CPURegs, 1, IIAlu, add>, ADD_FM<0, 0x21>;