Added support for FP Registers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52079 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MipsRegisterInfo.td

@@ -17,6 +17,10 @@ class MipsReg<string n> : Register<n> {
   let Namespace = "Mips";
 }
 
+//===----------------------------------------------------------------------===//
+//  General Purpose Registers
+//===----------------------------------------------------------------------===//
+
 // Mips CPU Registers
 class MipsGPRReg<bits<5> num, string n> : MipsReg<n> {
   let Num = num;
@@ -78,3 +82,121 @@ def CPURegs : RegisterClass<"Mips", [i32], 32,
     }
   }];
 }
+
+//===----------------------------------------------------------------------===//
+//  Floating Point Unit Registers (Single Precision)
+//===----------------------------------------------------------------------===//
+
+/// Mips Single point precision FPU Register Format
+class MipsFPUReg<bits<5> num, string n> : MipsReg<n> {
+  let Num = num;
+}
+
+/// Mips Single point precision FPU Registers
+def F0  : MipsFPUReg< 0,  "F0">, DwarfRegNum<[32]>;
+def F1  : MipsFPUReg< 1,  "F1">, DwarfRegNum<[33]>;
+def F2  : MipsFPUReg< 2,  "F2">, DwarfRegNum<[34]>;
+def F3  : MipsFPUReg< 3,  "F3">, DwarfRegNum<[35]>;
+def F4  : MipsFPUReg< 4,  "F4">, DwarfRegNum<[36]>;
+def F5  : MipsFPUReg< 5,  "F5">, DwarfRegNum<[37]>;
+def F6  : MipsFPUReg< 6,  "F6">, DwarfRegNum<[38]>;
+def F7  : MipsFPUReg< 7,  "F7">, DwarfRegNum<[39]>;
+def F8  : MipsFPUReg< 8,  "F8">, DwarfRegNum<[40]>;
+def F9  : MipsFPUReg< 9,  "F9">, DwarfRegNum<[41]>;
+def F10 : MipsFPUReg<10, "F10">, DwarfRegNum<[42]>;
+def F11 : MipsFPUReg<11, "F11">, DwarfRegNum<[43]>;
+def F12 : MipsFPUReg<12, "F12">, DwarfRegNum<[44]>;
+def F13 : MipsFPUReg<13, "F13">, DwarfRegNum<[45]>;
+def F14 : MipsFPUReg<14, "F14">, DwarfRegNum<[46]>;
+def F15 : MipsFPUReg<15, "F15">, DwarfRegNum<[47]>;
+def F16 : MipsFPUReg<16, "F16">, DwarfRegNum<[48]>;
+def F17 : MipsFPUReg<17, "F17">, DwarfRegNum<[49]>;
+def F18 : MipsFPUReg<18, "F18">, DwarfRegNum<[50]>;
+def F19 : MipsFPUReg<19, "F19">, DwarfRegNum<[51]>;
+def F20 : MipsFPUReg<20, "F20">, DwarfRegNum<[52]>;
+def F21 : MipsFPUReg<21, "F21">, DwarfRegNum<[53]>;
+def F22 : MipsFPUReg<22, "F22">, DwarfRegNum<[54]>;
+def F23 : MipsFPUReg<23, "F23">, DwarfRegNum<[55]>;
+def F24 : MipsFPUReg<24, "F24">, DwarfRegNum<[56]>;
+def F25 : MipsFPUReg<25, "F25">, DwarfRegNum<[57]>;
+def F26 : MipsFPUReg<26, "F26">, DwarfRegNum<[58]>;
+def F27 : MipsFPUReg<27, "F27">, DwarfRegNum<[59]>;
+def F28 : MipsFPUReg<28, "F28">, DwarfRegNum<[60]>;
+def F29 : MipsFPUReg<29, "F29">, DwarfRegNum<[61]>;
+def F30 : MipsFPUReg<30, "F30">, DwarfRegNum<[62]>;
+def F31 : MipsFPUReg<31, "F31">, DwarfRegNum<[63]>;
+
+/// FPU Single Point Precision Registers Class
+def FPUDRegs : RegisterClass<"Mips", [f32], 32, 
+  // Return Values and Arguments
+  [F0, F1, F2, F3, F12, F13, F14, F15,
+  // Not preserved across procedure calls
+  F4, F5, F6, F7, F8, F9, F10, F11, F16, F17, F18, F19, 
+  // Callee save
+  F20, F21, F22, F23, F24, F25, F26, F27, F28, F29, F30,
+  // Reserved
+  F31]>
+{
+  let MethodProtos = [{
+    iterator allocation_order_end(const MachineFunction &MF) const;
+  }];
+  let MethodBodies = [{
+    FPUDRegsClass::iterator
+    FPUDRegsClass::allocation_order_end(const MachineFunction &MF) const {
+      // The last register on the list above is reserved
+      return end()-1;
+    }
+  }];
+}
+
+//===----------------------------------------------------------------------===//
+//  Floating Point Unit Registers (Double Precision)
+//===----------------------------------------------------------------------===//
+
+/// Mips Double point precision FPU Register Format
+class MipsFPUDReg<bits<5> num, string n, list<Register> aliases> : MipsReg<n> {
+  let Num = num;
+  let Aliases = aliases;
+}
+
+/// Mips Double point precision FPU Registers (aliased
+/// with the single precision to hold 64 bit values)
+def D0  : MipsFPUDReg< 0,  "F0", [F0,   F1]>, DwarfRegNum<[32]>;
+def D1  : MipsFPUDReg< 2,  "F2", [F2,   F3]>, DwarfRegNum<[34]>;
+def D2  : MipsFPUDReg< 4,  "F4", [F4,   F5]>, DwarfRegNum<[36]>;
+def D3  : MipsFPUDReg< 6,  "F6", [F6,   F7]>, DwarfRegNum<[38]>;
+def D4  : MipsFPUDReg< 8,  "F8", [F8,   F9]>, DwarfRegNum<[40]>;
+def D5  : MipsFPUDReg<10, "F10", [F10, F11]>, DwarfRegNum<[42]>;
+def D6  : MipsFPUDReg<12, "F12", [F12, F13]>, DwarfRegNum<[44]>;
+def D7  : MipsFPUDReg<14, "F14", [F14, F15]>, DwarfRegNum<[46]>;
+def D8  : MipsFPUDReg<16, "F16", [F16, F17]>, DwarfRegNum<[48]>;
+def D9  : MipsFPUDReg<18, "F18", [F18, F19]>, DwarfRegNum<[50]>;
+def D10 : MipsFPUDReg<20, "F20", [F20, F21]>, DwarfRegNum<[52]>;
+def D11 : MipsFPUDReg<22, "F22", [F22, F23]>, DwarfRegNum<[54]>;
+def D12 : MipsFPUDReg<24, "F24", [F24, F25]>, DwarfRegNum<[56]>;
+def D13 : MipsFPUDReg<26, "F26", [F26, F27]>, DwarfRegNum<[58]>;
+def D14 : MipsFPUDReg<28, "F28", [F28, F29]>, DwarfRegNum<[60]>;
+def D15 : MipsFPUDReg<30, "F30", [F30, F31]>, DwarfRegNum<[62]>;
+
+/// FPU Single Point Precision Registers Class
+def FPURegs : RegisterClass<"Mips", [f32], 32, 
+  // Return Values and Arguments
+  [D0, D1, D6, D7,
+  // Not preserved across procedure calls
+  D2, D3, D4, D5, D8, D9, 
+  // Callee save
+  D10, D11, D12, D13, D14,
+  // Reserved
+  D15]>
+{
+  let MethodProtos = [{
+    iterator allocation_order_end(const MachineFunction &MF) const;
+  }];
+  let MethodBodies = [{
+    FPURegsClass::iterator
+    FPURegsClass::allocation_order_end(const MachineFunction &MF) const {
+      // The last register on the list above is reserved
+      return end()-1;
+    }
+  }];
+}