diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/o3/cpu.cc | 2 | ||||
| -rw-r--r-- | src/cpu/o3/cpu_policy.hh | 2 | ||||
| -rw-r--r-- | src/cpu/o3/regfile.hh | 157 |
3 files changed, 88 insertions, 73 deletions
diff --git a/src/cpu/o3/cpu.cc b/src/cpu/o3/cpu.cc index 99beaa176..4b316ae7e 100644 --- a/src/cpu/o3/cpu.cc +++ b/src/cpu/o3/cpu.cc @@ -223,7 +223,7 @@ FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params) iew(this, params), commit(this, params), - regFile(this, params->numPhysIntRegs, + regFile(params->numPhysIntRegs, params->numPhysFloatRegs), freeList(params->numThreads, diff --git a/src/cpu/o3/cpu_policy.hh b/src/cpu/o3/cpu_policy.hh index eea49ad52..a48059202 100644 --- a/src/cpu/o3/cpu_policy.hh +++ b/src/cpu/o3/cpu_policy.hh @@ -62,7 +62,7 @@ struct SimpleCPUPolicy /** Typedef for the register file. Most classes assume a unified * physical register file. */ - typedef PhysRegFile<Impl> RegFile; + typedef PhysRegFile RegFile; /** Typedef for the freelist of registers. */ typedef SimpleFreeList FreeList; /** Typedef for the rename map. */ diff --git a/src/cpu/o3/regfile.hh b/src/cpu/o3/regfile.hh index d0f50c85c..b58f7a2a5 100644 --- a/src/cpu/o3/regfile.hh +++ b/src/cpu/o3/regfile.hh @@ -1,5 +1,6 @@ /* * Copyright (c) 2004-2005 The Regents of The University of Michigan + * Copyright (c) 2013 Advanced Micro Devices, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -44,13 +45,11 @@ /** * Simple physical register file class. - * Right now this is specific to Alpha until we decide if/how to make things - * generic enough to support other ISAs. */ -template <class Impl> class PhysRegFile { - protected: + private: + typedef TheISA::IntReg IntReg; typedef TheISA::FloatReg FloatReg; typedef TheISA::FloatRegBits FloatRegBits; @@ -60,19 +59,31 @@ class PhysRegFile FloatRegBits q; } PhysFloatReg; - // Note that most of the definitions of the IntReg, FloatReg, etc. exist - // within the Impl/ISA class and not within this PhysRegFile class. + /** Integer register file. */ + IntReg *intRegFile; - // Will make these registers public for now, but they probably should - // be private eventually with some accessor functions. - public: - typedef typename Impl::O3CPU O3CPU; + /** Floating point register file. */ + PhysFloatReg *floatRegFile; /** + * The first floating-point physical register index. The physical + * register file has a single continuous index space, with the + * initial indices mapping to the integer registers, followed + * immediately by the floating-point registers. Thus the first + * floating-point index is equal to the number of integer + * registers. + */ + unsigned baseFloatRegIndex; + + /** Total number of physical registers. */ + unsigned totalNumRegs; + + public: + /** * Constructs a physical register file with the specified amount of * integer and floating point registers. */ - PhysRegFile(O3CPU *_cpu, unsigned _numPhysicalIntRegs, + PhysRegFile(unsigned _numPhysicalIntRegs, unsigned _numPhysicalFloatRegs); /** @@ -80,15 +91,38 @@ class PhysRegFile */ ~PhysRegFile(); - //Everything below should be pretty well identical to the normal - //register file that exists within AlphaISA class. - //The duplication is unfortunate but it's better than having - //different ways to access certain registers. + /** @return the number of integer physical registers. */ + unsigned numIntPhysRegs() const { return baseFloatRegIndex; } + + /** @return the number of floating-point physical registers. */ + unsigned numFloatPhysRegs() const + { return totalNumRegs - baseFloatRegIndex; } + + /** @return the total number of physical registers. */ + unsigned totalNumPhysRegs() const { return totalNumRegs; } + + /** + * @return true if the specified physical register index + * corresponds to an integer physical register. + */ + bool isIntPhysReg(PhysRegIndex reg_idx) const + { + return 0 <= reg_idx && reg_idx < baseFloatRegIndex; + } + + /** + * @return true if the specified physical register index + * corresponds to a floating-point physical register. + */ + bool isFloatPhysReg(PhysRegIndex reg_idx) const + { + return (baseFloatRegIndex <= reg_idx && reg_idx < totalNumRegs); + } /** Reads an integer register. */ - uint64_t readIntReg(PhysRegIndex reg_idx) + uint64_t readIntReg(PhysRegIndex reg_idx) const { - assert(reg_idx < numPhysicalIntRegs); + assert(isIntPhysReg(reg_idx)); DPRINTF(IEW, "RegFile: Access to int register %i, has data " "%#x\n", int(reg_idx), intRegFile[reg_idx]); @@ -96,29 +130,27 @@ class PhysRegFile } /** Reads a floating point register (double precision). */ - FloatReg readFloatReg(PhysRegIndex reg_idx) + FloatReg readFloatReg(PhysRegIndex reg_idx) const { - // Remove the base Float reg dependency. - reg_idx = reg_idx - numPhysicalIntRegs; + assert(isFloatPhysReg(reg_idx)); - assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs); - - FloatReg floatReg = floatRegFile[reg_idx].d; + // Remove the base Float reg dependency. + PhysRegIndex reg_offset = reg_idx - baseFloatRegIndex; DPRINTF(IEW, "RegFile: Access to float register %i, has " - "data %#x\n", int(reg_idx), floatRegFile[reg_idx].q); + "data %#x\n", int(reg_idx), floatRegFile[reg_offset].q); - return floatReg; + return floatRegFile[reg_offset].d; } - FloatRegBits readFloatRegBits(PhysRegIndex reg_idx) + FloatRegBits readFloatRegBits(PhysRegIndex reg_idx) const { - // Remove the base Float reg dependency. - reg_idx = reg_idx - numPhysicalIntRegs; + assert(isFloatPhysReg(reg_idx)); - assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs); + // Remove the base Float reg dependency. + PhysRegIndex reg_offset = reg_idx - baseFloatRegIndex; - FloatRegBits floatRegBits = floatRegFile[reg_idx].q; + FloatRegBits floatRegBits = floatRegFile[reg_offset].q; DPRINTF(IEW, "RegFile: Access to float register %i as int, " "has data %#x\n", int(reg_idx), (uint64_t)floatRegBits); @@ -129,7 +161,7 @@ class PhysRegFile /** Sets an integer register to the given value. */ void setIntReg(PhysRegIndex reg_idx, uint64_t val) { - assert(reg_idx < numPhysicalIntRegs); + assert(isIntPhysReg(reg_idx)); DPRINTF(IEW, "RegFile: Setting int register %i to %#x\n", int(reg_idx), val); @@ -141,72 +173,55 @@ class PhysRegFile /** Sets a double precision floating point register to the given value. */ void setFloatReg(PhysRegIndex reg_idx, FloatReg val) { - // Remove the base Float reg dependency. - reg_idx = reg_idx - numPhysicalIntRegs; + assert(isFloatPhysReg(reg_idx)); - assert(reg_idx < numPhysicalFloatRegs); + // Remove the base Float reg dependency. + PhysRegIndex reg_offset = reg_idx - baseFloatRegIndex; DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n", int(reg_idx), (uint64_t)val); #if THE_ISA == ALPHA_ISA - if (reg_idx != TheISA::ZeroReg) + if (reg_offset != TheISA::ZeroReg) #endif - floatRegFile[reg_idx].d = val; + floatRegFile[reg_offset].d = val; } void setFloatRegBits(PhysRegIndex reg_idx, FloatRegBits val) { - // Remove the base Float reg dependency. - reg_idx = reg_idx - numPhysicalIntRegs; + assert(isFloatPhysReg(reg_idx)); - assert(reg_idx < numPhysicalFloatRegs); + // Remove the base Float reg dependency. + PhysRegIndex reg_offset = reg_idx - baseFloatRegIndex; DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n", int(reg_idx), (uint64_t)val); - floatRegFile[reg_idx].q = val; + floatRegFile[reg_offset].q = val; } - public: - /** (signed) integer register file. */ - IntReg *intRegFile; - - /** Floating point register file. */ - PhysFloatReg *floatRegFile; - - private: - int intrflag; // interrupt flag - - private: - /** CPU pointer. */ - O3CPU *cpu; - - public: - /** Number of physical integer registers. */ - unsigned numPhysicalIntRegs; - /** Number of physical floating point registers. */ - unsigned numPhysicalFloatRegs; }; -template <class Impl> -PhysRegFile<Impl>::PhysRegFile(O3CPU *_cpu, unsigned _numPhysicalIntRegs, - unsigned _numPhysicalFloatRegs) - : cpu(_cpu), numPhysicalIntRegs(_numPhysicalIntRegs), - numPhysicalFloatRegs(_numPhysicalFloatRegs) + +inline +PhysRegFile::PhysRegFile(unsigned _numPhysicalIntRegs, + unsigned _numPhysicalFloatRegs) + : baseFloatRegIndex(_numPhysicalIntRegs), + totalNumRegs(_numPhysicalIntRegs + _numPhysicalFloatRegs) { - intRegFile = new IntReg[numPhysicalIntRegs]; - floatRegFile = new PhysFloatReg[numPhysicalFloatRegs]; + intRegFile = new IntReg[_numPhysicalIntRegs]; + floatRegFile = new PhysFloatReg[_numPhysicalFloatRegs]; - memset(intRegFile, 0, sizeof(IntReg) * numPhysicalIntRegs); - memset(floatRegFile, 0, sizeof(PhysFloatReg) * numPhysicalFloatRegs); + memset(intRegFile, 0, sizeof(IntReg) * _numPhysicalIntRegs); + memset(floatRegFile, 0, sizeof(PhysFloatReg) * _numPhysicalFloatRegs); } -template <class Impl> -PhysRegFile<Impl>::~PhysRegFile() + +inline +PhysRegFile::~PhysRegFile() { delete intRegFile; delete floatRegFile; } -#endif +#endif //__CPU_O3_REGFILE_HH__ |