From 0317b65367563749d277ca31b6d464fc5f1d68c6 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Mon, 17 Oct 2011 18:21:24 +0000
Subject: [PATCH] Redefine multiply and divide instructions.

llvm-svn: 142211
---
 llvm/lib/Target/Mips/Mips64InstrInfo.td | 19 +++++----------
 llvm/lib/Target/Mips/MipsInstrInfo.td   | 32 +++++++++++++++----------
 2 files changed, 26 insertions(+), 25 deletions(-)

diff --git a/llvm/lib/Target/Mips/Mips64InstrInfo.td b/llvm/lib/Target/Mips/Mips64InstrInfo.td
index 29cc76ce4421..f2eb700e5e33 100644
--- a/llvm/lib/Target/Mips/Mips64InstrInfo.td
+++ b/llvm/lib/Target/Mips/Mips64InstrInfo.td
@@ -52,17 +52,10 @@ class shift_rotate_imm64_32<bits<6> func, bits<5> isRotate, string instr_asm,
                    CPU64Regs>;
 
 // Mul, Div
-let Defs = [HI64, LO64] in {
-  let isCommutable = 1 in
-  class Mul64<bits<6> func, string instr_asm, InstrItinClass itin>:
-    FR<0x00, func, (outs), (ins CPU64Regs:$a, CPU64Regs:$b),
-       !strconcat(instr_asm, "\t$a, $b"), [], itin>;
-
-  class Div64<SDNode op, bits<6> func, string instr_asm, InstrItinClass itin>:
-              FR<0x00, func, (outs), (ins CPU64Regs:$a, CPU64Regs:$b),
-              !strconcat(instr_asm, "\t$$zero, $a, $b"),
-              [(op CPU64Regs:$a, CPU64Regs:$b)], itin>;
-}
+class Mult64<bits<6> func, string instr_asm, InstrItinClass itin>:
+  Mult<func, instr_asm, itin, CPU64Regs, [HI64, LO64]>;
+class Div64<SDNode op, bits<6> func, string instr_asm, InstrItinClass itin>:
+  Div<op, func, instr_asm, itin, CPU64Regs, [HI64, LO64]>;
 
 // Move from Hi/Lo
 let shamt = 0 in {
@@ -159,8 +152,8 @@ def BLEZ64 : CBranchZero<0x07, 0, "blez", setle, CPU64Regs>;
 def BLTZ64 : CBranchZero<0x01, 0, "bltz", setlt, CPU64Regs>;
 
 /// Multiply and Divide Instructions.
-def DMULT    : Mul64<0x1c, "dmult", IIImul>;
-def DMULTu   : Mul64<0x1d, "dmultu", IIImul>;
+def DMULT    : Mult64<0x1c, "dmult", IIImul>;
+def DMULTu   : Mult64<0x1d, "dmultu", IIImul>;
 def DSDIV    : Div64<MipsDivRem, 0x1e, "ddiv", IIIdiv>;
 def DUDIV    : Div64<MipsDivRemU, 0x1f, "ddivu", IIIdiv>;
 
diff --git a/llvm/lib/Target/Mips/MipsInstrInfo.td b/llvm/lib/Target/Mips/MipsInstrInfo.td
index 7588605d18d1..537d97bcacd2 100644
--- a/llvm/lib/Target/Mips/MipsInstrInfo.td
+++ b/llvm/lib/Target/Mips/MipsInstrInfo.td
@@ -461,24 +461,32 @@ let isCall=1, hasDelaySlot=1,
 }
 
 // Mul, Div
-class Mul<bits<6> func, string instr_asm, InstrItinClass itin>:
-  FR<0x00, func, (outs), (ins CPURegs:$rs, CPURegs:$rt),
+class Mult<bits<6> func, string instr_asm, InstrItinClass itin,
+           RegisterClass RC, list<Register> DefRegs>:
+  FR<0x00, func, (outs), (ins RC:$rs, RC:$rt),
      !strconcat(instr_asm, "\t$rs, $rt"), [], itin> {
   let rd = 0;
   let shamt = 0;
   let isCommutable = 1;
-  let Defs = [HI, LO];
+  let Defs = DefRegs;
 }
 
-class Div<SDNode op, bits<6> func, string instr_asm, InstrItinClass itin>:
-          FR<0x00, func, (outs), (ins CPURegs:$rs, CPURegs:$rt),
-          !strconcat(instr_asm, "\t$$zero, $rs, $rt"),
-          [(op CPURegs:$rs, CPURegs:$rt)], itin> {
+class Mult32<bits<6> func, string instr_asm, InstrItinClass itin>:
+  Mult<func, instr_asm, itin, CPURegs, [HI, LO]>;
+
+class Div<SDNode op, bits<6> func, string instr_asm, InstrItinClass itin,
+          RegisterClass RC, list<Register> DefRegs>:
+  FR<0x00, func, (outs), (ins RC:$rs, RC:$rt),
+     !strconcat(instr_asm, "\t$$zero, $rs, $rt"),
+     [(op RC:$rs, RC:$rt)], itin> {
   let rd = 0;
   let shamt = 0;
-  let Defs = [HI, LO];
+  let Defs = DefRegs;
 }
 
+class Div32<SDNode op, bits<6> func, string instr_asm, InstrItinClass itin>:
+  Div<op, func, instr_asm, itin, CPURegs, [HI, LO]>;
+
 // Move from Hi/Lo
 class MoveFromLOHI<bits<6> func, string instr_asm>:
   FR<0x00, func, (outs CPURegs:$rd), (ins),
@@ -726,10 +734,10 @@ let isReturn=1, isTerminator=1, hasDelaySlot=1,
                 "jr\t$target", [(MipsRet CPURegs:$target)], IIBranch>;
 
 /// Multiply and Divide Instructions.
-def MULT    : Mul<0x18, "mult", IIImul>;
-def MULTu   : Mul<0x19, "multu", IIImul>;
-def SDIV    : Div<MipsDivRem, 0x1a, "div", IIIdiv>;
-def UDIV    : Div<MipsDivRemU, 0x1b, "divu", IIIdiv>;
+def MULT    : Mult32<0x18, "mult", IIImul>;
+def MULTu   : Mult32<0x19, "multu", IIImul>;
+def SDIV    : Div32<MipsDivRem, 0x1a, "div", IIIdiv>;
+def UDIV    : Div32<MipsDivRemU, 0x1b, "divu", IIIdiv>;
 
 let Defs = [HI] in
   def MTHI  : MoveToLOHI<0x11, "mthi">;