-//===- MipsRegisterInfo.td - Mips Register defs -----------------*- C++ -*-===//
+//===- MipsRegisterInfo.td - Mips Register defs ------------*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
let Namespace = "Mips";
}
+class MipsRegWithSubRegs<string n, list<Register> subregs>
+ : RegisterWithSubRegs<n, subregs> {
+ field bits<5> Num;
+ let Namespace = "Mips";
+}
+
// Mips CPU Registers
class MipsGPRReg<bits<5> num, string n> : MipsReg<n> {
let Num = num;
}
// Mips 64-bit (aliased) FPU Registers
-class AFPR<bits<5> num, string n, list<Register> aliases> : MipsReg<n> {
+let Namespace = "Mips" in {
+def sub_fpeven : SubRegIndex;
+def sub_fpodd : SubRegIndex;
+}
+class AFPR<bits<5> num, string n, list<Register> subregs>
+ : MipsRegWithSubRegs<n, subregs> {
let Num = num;
- let Aliases = aliases;
+ let SubRegIndices = [sub_fpeven, sub_fpodd];
}
//===----------------------------------------------------------------------===//
def LO : Register<"lo">, DwarfRegNum<[65]>;
// Status flags register
- def FCR31 : Register<"FCR31">;
+ def FCR31 : Register<"31">;
}
//===----------------------------------------------------------------------===//
}];
}
-// * 64bit fp:
-// - FGR64 = 32 64-bit registers (default mode)
-// - AFGR32/AFGR64 = 16 even 32-bit registers (32-bit compatible mode) for
-// single and double access.
-// * 32bit fp:
-// - AFGR32/AFGR64 = 16 even 32-bit registers - single and double
-// - FGR32 = 32 32-bit registers (within single-only mode)
+// 64bit fp:
+// * FGR64 - 32 64-bit registers
+// * AFGR64 - 16 32-bit even registers (32-bit FP Mode)
+//
+// 32bit fp:
+// * FGR32 - 16 32-bit even registers
+// * FGR32 - 32 32-bit registers (single float only mode)
def FGR32 : RegisterClass<"Mips", [f32], 32,
// Return Values and Arguments
[F0, F1, F2, F3, F12, F13, F14, F15,
F31]>
{
let MethodProtos = [{
+ iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
let MethodBodies = [{
+
+ static const unsigned MIPS_FGR32[] = {
+ Mips::F0, Mips::F1, Mips::F2, Mips::F3, Mips::F12, Mips::F13,
+ Mips::F14, Mips::F15, Mips::F4, Mips::F5, Mips::F6, Mips::F7,
+ Mips::F8, Mips::F9, Mips::F10, Mips::F11, Mips::F16, Mips::F17,
+ Mips::F18, Mips::F19, Mips::F20, Mips::F21, Mips::F22, Mips::F23,
+ Mips::F24, Mips::F25, Mips::F26, Mips::F27, Mips::F28, Mips::F29,
+ Mips::F30
+ };
+
+ static const unsigned MIPS_SVR4_FGR32[] = {
+ Mips::F0, Mips::F2, Mips::F12, Mips::F14, Mips::F4,
+ Mips::F6, Mips::F8, Mips::F10, Mips::F16, Mips::F18,
+ Mips::F20, Mips::F22, Mips::F24, Mips::F26, Mips::F28, Mips::F30,
+ };
+
FGR32Class::iterator
- FGR32Class::allocation_order_end(const MachineFunction &MF) const {
- // The last register on the list above is reserved
- return end()-1;
+ FGR32Class::allocation_order_begin(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const MipsSubtarget &Subtarget = TM.getSubtarget<MipsSubtarget>();
+
+ if (Subtarget.isSingleFloat())
+ return MIPS_FGR32;
+ else
+ return MIPS_SVR4_FGR32;
}
- }];
-}
-def AFGR32 : RegisterClass<"Mips", [f32], 32,
- // Return Values and Arguments
- [F0, F2, F12, F14,
- // Not preserved across procedure calls
- F4, F6, F8, F10, F16, F18,
- // Callee save
- F20, F22, F24, F26, F28, F30,
- // Reserved
- F31]>
-{
- let MethodProtos = [{
- iterator allocation_order_end(const MachineFunction &MF) const;
- }];
- let MethodBodies = [{
- AFGR32Class::iterator
- AFGR32Class::allocation_order_end(const MachineFunction &MF) const {
- // The last register on the list above is reserved
- return end()-1;
+ FGR32Class::iterator
+ FGR32Class::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const MipsSubtarget &Subtarget = TM.getSubtarget<MipsSubtarget>();
+
+ if (Subtarget.isSingleFloat())
+ return MIPS_FGR32 + (sizeof(MIPS_FGR32) / sizeof(unsigned));
+ else
+ return MIPS_SVR4_FGR32 + (sizeof(MIPS_SVR4_FGR32) / sizeof(unsigned));
}
}];
}
// Reserved
D15]>
{
+ let SubRegClasses = [(FGR32 sub_fpeven, sub_fpodd)];
let MethodProtos = [{
iterator allocation_order_end(const MachineFunction &MF) const;
}];
}];
}
-def CCR : RegisterClass<"Mips", [i32], 32, [FCR31]> {
- let CopyCost = -1; // Don't allow copying of status registers.
-}
+// Condition Register for floating point operations
+def CCR : RegisterClass<"Mips", [i32], 32, [FCR31]>;
-def HILO : RegisterClass<"Mips", [i32], 32, [HI, LO]> {
- //let CopyCost = -1; // Don't allow copying of hi/lo registers.
-}
+// Hi/Lo Registers
+def HILO : RegisterClass<"Mips", [i32], 32, [HI, LO]>;