diff options
Diffstat (limited to 'cpu/o3/rename_map.cc')
| -rw-r--r-- | cpu/o3/rename_map.cc | 210 |
1 files changed, 79 insertions, 131 deletions
diff --git a/cpu/o3/rename_map.cc b/cpu/o3/rename_map.cc index 10963f7de..8ba632e65 100644 --- a/cpu/o3/rename_map.cc +++ b/cpu/o3/rename_map.cc @@ -39,98 +39,94 @@ using namespace std; // determine if the register is a logical int, logical fp, physical int, // physical fp, etc. -SimpleRenameMap::SimpleRenameMap(unsigned _numLogicalIntRegs, - unsigned _numPhysicalIntRegs, - unsigned _numLogicalFloatRegs, - unsigned _numPhysicalFloatRegs, - unsigned _numMiscRegs, - RegIndex _intZeroReg, - RegIndex _floatZeroReg) - : numLogicalIntRegs(_numLogicalIntRegs), - numPhysicalIntRegs(_numPhysicalIntRegs), - numLogicalFloatRegs(_numLogicalFloatRegs), - numPhysicalFloatRegs(_numPhysicalFloatRegs), - numMiscRegs(_numMiscRegs), - intZeroReg(_intZeroReg), - floatZeroReg(_floatZeroReg) +SimpleRenameMap::~SimpleRenameMap() +{ + // Delete the rename maps as they were allocated with new. + //delete [] intRenameMap; + //delete [] floatRenameMap; +} + +void +SimpleRenameMap::init(unsigned _numLogicalIntRegs, + unsigned _numPhysicalIntRegs, + PhysRegIndex &ireg_idx, + + unsigned _numLogicalFloatRegs, + unsigned _numPhysicalFloatRegs, + PhysRegIndex &freg_idx, + + unsigned _numMiscRegs, + + RegIndex _intZeroReg, + RegIndex _floatZeroReg, + + int map_id, + bool bindRegs) { - DPRINTF(Rename, "Rename: Creating rename map. Phys: %i / %i, Float: " - "%i / %i.\n", numLogicalIntRegs, numPhysicalIntRegs, + id = map_id; + + numLogicalIntRegs = _numLogicalIntRegs; + + numLogicalFloatRegs = _numLogicalFloatRegs; + + numPhysicalIntRegs = _numPhysicalIntRegs; + + numPhysicalFloatRegs = _numPhysicalFloatRegs; + + numMiscRegs = _numMiscRegs; + + intZeroReg = _intZeroReg; + floatZeroReg = _floatZeroReg; + + DPRINTF(Rename, "Creating rename map %i. Phys: %i / %i, Float: " + "%i / %i.\n", id, numLogicalIntRegs, numPhysicalIntRegs, numLogicalFloatRegs, numPhysicalFloatRegs); numLogicalRegs = numLogicalIntRegs + numLogicalFloatRegs; numPhysicalRegs = numPhysicalIntRegs + numPhysicalFloatRegs; - //Create the rename maps, and their scoreboards. - intRenameMap = new RenameEntry[numLogicalIntRegs]; - floatRenameMap = new RenameEntry[numLogicalRegs]; - - // Should combine this into one scoreboard. - intScoreboard.resize(numPhysicalIntRegs); - floatScoreboard.resize(numPhysicalRegs); - miscScoreboard.resize(numPhysicalRegs + numMiscRegs); - - // Initialize the entries in the integer rename map to point to the - // physical registers of the same index, and consider each register - // ready until the first rename occurs. - for (RegIndex index = 0; index < numLogicalIntRegs; ++index) - { - intRenameMap[index].physical_reg = index; - intScoreboard[index] = 1; - } + //Create the rename maps + intRenameMap.resize(numLogicalIntRegs); + floatRenameMap.resize(numLogicalRegs); - // Initialize the rest of the physical registers (the ones that don't - // directly map to a logical register) as unready. - for (PhysRegIndex index = numLogicalIntRegs; - index < numPhysicalIntRegs; - ++index) - { - intScoreboard[index] = 0; - } + if (bindRegs) { + DPRINTF(Rename, "Binding registers into rename map %i",id); - int float_reg_idx = numPhysicalIntRegs; - - // Initialize the entries in the floating point rename map to point to - // the physical registers of the same index, and consider each register - // ready until the first rename occurs. - // Although the index refers purely to architected registers, because - // the floating reg indices come after the integer reg indices, they - // may exceed the size of a normal RegIndex (short). - for (PhysRegIndex index = numLogicalIntRegs; - index < numLogicalRegs; ++index) - { - floatRenameMap[index].physical_reg = float_reg_idx++; - } + // Initialize the entries in the integer rename map to point to the + // physical registers of the same index + for (RegIndex index = 0; index < numLogicalIntRegs; ++index) + { + intRenameMap[index].physical_reg = ireg_idx++; + } - for (PhysRegIndex index = numPhysicalIntRegs; - index < numPhysicalIntRegs + numLogicalFloatRegs; ++index) - { - floatScoreboard[index] = 1; - } + // Initialize the entries in the floating point rename map to point to + // the physical registers of the same index + // Although the index refers purely to architected registers, because + // the floating reg indices come after the integer reg indices, they + // may exceed the size of a normal RegIndex (short). + for (PhysRegIndex index = numLogicalIntRegs; index < numLogicalRegs; ++index) + { + floatRenameMap[index].physical_reg = freg_idx++; + } + } else { + DPRINTF(Rename, "Binding registers into rename map %i",id); - // Initialize the rest of the physical registers (the ones that don't - // directly map to a logical register) as unready. - for (PhysRegIndex index = numPhysicalIntRegs + numLogicalFloatRegs; - index < numPhysicalRegs; - ++index) - { - floatScoreboard[index] = 0; - } + PhysRegIndex temp_ireg = ireg_idx; - // Initialize the entries in the misc register scoreboard to be ready. - for (PhysRegIndex index = numPhysicalRegs; - index < numPhysicalRegs + numMiscRegs; ++index) - { - miscScoreboard[index] = 1; - } -} + for (RegIndex index = 0; index < numLogicalIntRegs; ++index) + { + intRenameMap[index].physical_reg = temp_ireg++; + } -SimpleRenameMap::~SimpleRenameMap() -{ - // Delete the rename maps as they were allocated with new. - delete [] intRenameMap; - delete [] floatRenameMap; + PhysRegIndex temp_freg = freg_idx; + + for (PhysRegIndex index = numLogicalIntRegs; + index < numLogicalRegs; ++index) + { + floatRenameMap[index].physical_reg = temp_freg++; + } + } } void @@ -167,8 +163,6 @@ SimpleRenameMap::rename(RegIndex arch_reg) assert(renamed_reg >= 0 && renamed_reg < numPhysicalIntRegs); - // Mark register as not ready. - intScoreboard[renamed_reg] = false; } else { // Otherwise return the zero register so nothing bad happens. renamed_reg = intZeroReg; @@ -192,9 +186,6 @@ SimpleRenameMap::rename(RegIndex arch_reg) assert(renamed_reg < numPhysicalRegs && renamed_reg >= numPhysicalIntRegs); - - // Mark register as not ready. - floatScoreboard[renamed_reg] = false; } else { // Otherwise return the zero register so nothing bad happens. renamed_reg = floatZeroReg; @@ -215,8 +206,6 @@ SimpleRenameMap::rename(RegIndex arch_reg) prev_reg = renamed_reg; assert(renamed_reg < numPhysicalRegs + numMiscRegs); - - miscScoreboard[renamed_reg] = false; } return RenameInfo(renamed_reg, prev_reg); @@ -244,25 +233,6 @@ SimpleRenameMap::lookup(RegIndex arch_reg) } } -bool -SimpleRenameMap::isReady(PhysRegIndex phys_reg) -{ - if (phys_reg < numPhysicalIntRegs) { - return intScoreboard[phys_reg]; - } else if (phys_reg < numPhysicalRegs) { - - // Subtract off the base FP offset. -// phys_reg = phys_reg - numPhysicalIntRegs; - - return floatScoreboard[phys_reg]; - } else { - // Subtract off the misc registers offset. -// phys_reg = phys_reg - numPhysicalRegs; - - return miscScoreboard[phys_reg]; - } -} - // In this implementation the miscellaneous registers do not actually rename, // so this function does not allow you to try to change their mappings. void @@ -273,14 +243,16 @@ SimpleRenameMap::setEntry(RegIndex arch_reg, PhysRegIndex renamed_reg) (int)arch_reg, renamed_reg); intRenameMap[arch_reg].physical_reg = renamed_reg; - } else { - assert(arch_reg < (numLogicalIntRegs + numLogicalFloatRegs)); + } else if (arch_reg < numLogicalIntRegs + numLogicalFloatRegs) { + DPRINTF(Rename, "Rename Map: Float register %i being set to %i.\n", (int)arch_reg - numLogicalIntRegs, renamed_reg); floatRenameMap[arch_reg].physical_reg = renamed_reg; } + + //assert(arch_reg < (numLogicalIntRegs + numLogicalFloatRegs)); } void @@ -308,30 +280,6 @@ SimpleRenameMap::squash(vector<RegIndex> freed_regs, // Take unmap info and roll back the rename map. } -void -SimpleRenameMap::markAsReady(PhysRegIndex ready_reg) -{ - DPRINTF(Rename, "Rename map: Marking register %i as ready.\n", - (int)ready_reg); - - if (ready_reg < numPhysicalIntRegs) { - assert(ready_reg >= 0); - - intScoreboard[ready_reg] = 1; - } else if (ready_reg < numPhysicalRegs) { - - // Subtract off the base FP offset. -// ready_reg = ready_reg - numPhysicalIntRegs; - - floatScoreboard[ready_reg] = 1; - } else { - //Subtract off the misc registers offset. -// ready_reg = ready_reg - numPhysicalRegs; - - miscScoreboard[ready_reg] = 1; - } -} - int SimpleRenameMap::numFreeEntries() { |