From a473b5a6eb269cc303ecfb5e5643d891a5d255d9 Mon Sep 17 00:00:00 2001 From: Rekai Gonzalez-Alberquilla Date: Wed, 5 Apr 2017 13:14:34 -0500 Subject: cpu: Simplify the rename interface and use RegId With the hierarchical RegId there are a lot of functions that are redundant now. The idea behind the simplification is that instead of having the regId, telling which kind of register read/write/rename/lookup/etc. and then the function panic_if'ing if the regId is not of the appropriate type, we provide an interface that decides what kind of register to read depending on the register type of the given regId. Change-Id: I7d52e9e21fc01205ae365d86921a4ceb67a57178 Reviewed-by: Andreas Sandberg [ Fix RISCV build issues ] Signed-off-by: Andreas Sandberg Reviewed-on: https://gem5-review.googlesource.com/2702 --- src/arch/arm/insts/misc.cc | 16 ++++++++-------- src/arch/arm/isa.hh | 16 ++++++++++++++++ src/arch/arm/isa/insts/data64.isa | 16 ++++++++++------ src/arch/arm/isa/insts/fp.isa | 2 +- src/arch/arm/isa/insts/misc.isa | 18 ++++++++++++------ 5 files changed, 47 insertions(+), 21 deletions(-) (limited to 'src/arch/arm') diff --git a/src/arch/arm/insts/misc.cc b/src/arch/arm/insts/misc.cc index 0114a4aba..059f86f63 100644 --- a/src/arch/arm/insts/misc.cc +++ b/src/arch/arm/insts/misc.cc @@ -51,16 +51,16 @@ MrsOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const ss << ", "; bool foundPsr = false; for (unsigned i = 0; i < numSrcRegs(); i++) { - RegId reg = srcRegIdx(i); - if (reg.regClass != MiscRegClass) { + const RegId& reg = srcRegIdx(i); + if (!reg.isMiscReg()) { continue; } - if (reg.regIdx == MISCREG_CPSR) { + if (reg.index() == MISCREG_CPSR) { ss << "cpsr"; foundPsr = true; break; } - if (reg.regIdx == MISCREG_SPSR) { + if (reg.index() == MISCREG_SPSR) { ss << "spsr"; foundPsr = true; break; @@ -79,16 +79,16 @@ MsrBase::printMsrBase(std::ostream &os) const bool apsr = false; bool foundPsr = false; for (unsigned i = 0; i < numDestRegs(); i++) { - RegId reg = destRegIdx(i); - if (reg.regClass != MiscRegClass) { + const RegId& reg = destRegIdx(i); + if (!reg.isMiscReg()) { continue; } - if (reg.regIdx == MISCREG_CPSR) { + if (reg.index() == MISCREG_CPSR) { os << "cpsr_"; foundPsr = true; break; } - if (reg.regIdx == MISCREG_SPSR) { + if (reg.index() == MISCREG_SPSR) { if (bits(byteMask, 1, 0)) { os << "spsr_"; } else { diff --git a/src/arch/arm/isa.hh b/src/arch/arm/isa.hh index e05f0e18a..8de90dc93 100644 --- a/src/arch/arm/isa.hh +++ b/src/arch/arm/isa.hh @@ -177,6 +177,22 @@ namespace ArmISA void setMiscRegNoEffect(int misc_reg, const MiscReg &val); void setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc); + RegId + flattenRegId(const RegId& regId) const + { + switch (regId.classValue()) { + case IntRegClass: + return RegId(IntRegClass, flattenIntIndex(regId.index())); + case FloatRegClass: + return RegId(FloatRegClass, flattenFloatIndex(regId.index())); + case CCRegClass: + return RegId(CCRegClass, flattenCCIndex(regId.index())); + case MiscRegClass: + return RegId(MiscRegClass, flattenMiscIndex(regId.index())); + } + return RegId(); + } + int flattenIntIndex(int reg) const { diff --git a/src/arch/arm/isa/insts/data64.isa b/src/arch/arm/isa/insts/data64.isa index d60dc60f1..48fc87ccb 100644 --- a/src/arch/arm/isa/insts/data64.isa +++ b/src/arch/arm/isa/insts/data64.isa @@ -328,7 +328,7 @@ let {{ buildDataXImmInst("mrs", ''' MiscRegIndex flat_idx = (MiscRegIndex) xc->tcBase()-> - flattenMiscIndex(op1); + flattenRegId(RegId(MiscRegClass, op1)).index(); CPSR cpsr = Cpsr; ExceptionLevel el = (ExceptionLevel) (uint8_t) cpsr.el; %s @@ -346,7 +346,7 @@ let {{ buildDataXImmInst("msr", ''' MiscRegIndex flat_idx = (MiscRegIndex) xc->tcBase()-> - flattenMiscIndex(dest); + flattenRegId(RegId(MiscRegClass, dest)).index(); CPSR cpsr = Cpsr; ExceptionLevel el = (ExceptionLevel) (uint8_t) cpsr.el; %s @@ -362,7 +362,8 @@ let {{ ''') msrdczva_ea_code = ''' - MiscRegIndex flat_idx = (MiscRegIndex) xc->tcBase()->flattenMiscIndex(dest); + MiscRegIndex flat_idx = (MiscRegIndex) xc->tcBase()->flattenRegId( + RegId(MiscRegClass, dest)).index(); CPSR cpsr = Cpsr; ExceptionLevel el = (ExceptionLevel) (uint8_t) cpsr.el; ''' @@ -391,7 +392,8 @@ let {{ buildDataXImmInst("msrSP", ''' if (!canWriteAArch64SysReg( - (MiscRegIndex) xc->tcBase()->flattenMiscIndex(dest), + (MiscRegIndex) xc->tcBase()->flattenRegId( + RegId(MiscRegClass, dest)).index(), Scr64, Cpsr, xc->tcBase())) { return std::make_shared(machInst, false, mnemonic); @@ -401,7 +403,8 @@ let {{ buildDataXImmInst("msrDAIFSet", ''' if (!canWriteAArch64SysReg( - (MiscRegIndex) xc->tcBase()->flattenMiscIndex(dest), + (MiscRegIndex) xc->tcBase()->flattenRegId( + RegId(MiscRegClass, dest)).index(), Scr64, Cpsr, xc->tcBase())) { return std::make_shared( machInst, 0, EC_TRAPPED_MSR_MRS_64, @@ -414,7 +417,8 @@ let {{ buildDataXImmInst("msrDAIFClr", ''' if (!canWriteAArch64SysReg( - (MiscRegIndex) xc->tcBase()->flattenMiscIndex(dest), + (MiscRegIndex) xc->tcBase()->flattenRegId( + RegId(MiscRegClass, dest)).index(), Scr64, Cpsr, xc->tcBase())) { return std::make_shared( machInst, 0, EC_TRAPPED_MSR_MRS_64, diff --git a/src/arch/arm/isa/insts/fp.isa b/src/arch/arm/isa/insts/fp.isa index dc2f30701..dff906755 100644 --- a/src/arch/arm/isa/insts/fp.isa +++ b/src/arch/arm/isa/insts/fp.isa @@ -224,7 +224,7 @@ let {{ if (!inSecureState(scr, cpsr) && (cpsr.mode != MODE_HYP)) { HCR hcr = Hcr; bool hypTrap = false; - switch(xc->tcBase()->flattenMiscIndex(op1)) { + switch(xc->tcBase()->flattenRegId(RegId(MiscRegClass, op1)).index()) { case MISCREG_FPSID: hypTrap = hcr.tid0; break; diff --git a/src/arch/arm/isa/insts/misc.isa b/src/arch/arm/isa/insts/misc.isa index 6d6e56b8f..5eda615b5 100644 --- a/src/arch/arm/isa/insts/misc.isa +++ b/src/arch/arm/isa/insts/misc.isa @@ -813,7 +813,8 @@ let {{ exec_output += PredOpExecute.subst(bfiIop) mrc14code = ''' - MiscRegIndex miscReg = (MiscRegIndex) xc->tcBase()->flattenMiscIndex(op1); + MiscRegIndex miscReg = (MiscRegIndex) xc->tcBase()->flattenRegId( + RegId(MiscRegClass, op1)).index(); bool can_read, undefined; std::tie(can_read, undefined) = canReadCoprocReg(miscReg, Scr, Cpsr); if (!can_read || undefined) { @@ -837,7 +838,8 @@ let {{ mcr14code = ''' - MiscRegIndex miscReg = (MiscRegIndex) xc->tcBase()->flattenMiscIndex(dest); + MiscRegIndex miscReg = (MiscRegIndex) xc->tcBase()->flattenRegId( + RegId(MiscRegClass, dest)).index(); bool can_write, undefined; std::tie(can_write, undefined) = canWriteCoprocReg(miscReg, Scr, Cpsr); if (undefined || !can_write) { @@ -862,7 +864,8 @@ let {{ mrc15code = ''' int preFlatOp1 = flattenMiscRegNsBanked(op1, xc->tcBase()); MiscRegIndex miscReg = (MiscRegIndex) - xc->tcBase()->flattenMiscIndex(preFlatOp1); + xc->tcBase()->flattenRegId(RegId(MiscRegClass, + preFlatOp1)).index(); bool hypTrap = mcrMrc15TrapToHyp(miscReg, Hcr, Cpsr, Scr, Hdcr, Hstr, Hcptr, imm); bool can_read, undefined; @@ -893,7 +896,8 @@ let {{ mcr15code = ''' int preFlatDest = flattenMiscRegNsBanked(dest, xc->tcBase()); MiscRegIndex miscReg = (MiscRegIndex) - xc->tcBase()->flattenMiscIndex(preFlatDest); + xc->tcBase()->flattenRegId(RegId(MiscRegClass, + preFlatDest)).index(); bool hypTrap = mcrMrc15TrapToHyp(miscReg, Hcr, Cpsr, Scr, Hdcr, Hstr, Hcptr, imm); bool can_write, undefined; @@ -925,7 +929,8 @@ let {{ mrrc15code = ''' int preFlatOp1 = flattenMiscRegNsBanked(op1, xc->tcBase()); MiscRegIndex miscReg = (MiscRegIndex) - xc->tcBase()->flattenMiscIndex(preFlatOp1); + xc->tcBase()->flattenRegId(RegId(MiscRegClass, + preFlatOp1)).index(); bool hypTrap = mcrrMrrc15TrapToHyp(miscReg, Cpsr, Scr, Hstr, Hcr, imm); bool can_read, undefined; std::tie(can_read, undefined) = canReadCoprocReg(miscReg, Scr, Cpsr); @@ -955,7 +960,8 @@ let {{ mcrr15code = ''' int preFlatDest = flattenMiscRegNsBanked(dest, xc->tcBase()); MiscRegIndex miscReg = (MiscRegIndex) - xc->tcBase()->flattenMiscIndex(preFlatDest); + xc->tcBase()->flattenRegId(RegId(MiscRegClass, + preFlatDest)).index(); bool hypTrap = mcrrMrrc15TrapToHyp(miscReg, Cpsr, Scr, Hstr, Hcr, imm); bool can_write, undefined; std::tie(can_write, undefined) = canWriteCoprocReg(miscReg, Scr, Cpsr); -- cgit v1.2.3