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codegenclassic.h
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codegenclassic.h
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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
//
// This file contains the members of CodeGen that are defined and used
// only by the "classic" JIT backend. It is included by CodeGen.h in the
// definition of the CodeGen class.
//
#ifndef _CODEGENCLASSIC_H_
#define _CODEGENCLASSIC_H_
#ifdef LEGACY_BACKEND // Not necessary (it's this way in the #include location), but helpful to IntelliSense
#if FEATURE_STACK_FP_X87
VARSET_TP genFPregVars; // mask corresponding to genFPregCnt
unsigned genFPdeadRegCnt; // The dead unpopped part of genFPregCnt
#endif // FEATURE_STACK_FP_X87
//-------------------------------------------------------------------------
void genSetRegToIcon (regNumber reg,
ssize_t val,
var_types type = TYP_INT,
insFlags flags = INS_FLAGS_DONT_CARE);
regNumber genGetRegSetToIcon (ssize_t val,
regMaskTP regBest = 0,
var_types type = TYP_INT);
void genDecRegBy (regNumber reg,
ssize_t ival,
GenTreePtr tree);
void genMulRegBy (regNumber reg,
ssize_t ival,
GenTreePtr tree,
var_types dstType = TYP_INT,
bool ovfl = false);
//-------------------------------------------------------------------------
bool genRegTrashable (regNumber reg,
GenTreePtr tree);
//
// Prolog functions and data (there are a few exceptions for more generally used things)
//
regNumber genLclHeap (GenTreePtr size);
void genSinglePush ();
void genSinglePop ();
void genDyingVars (VARSET_VALARG_TP beforeSet,
VARSET_VALARG_TP afterSet);
bool genContainsVarDeath (GenTreePtr from, GenTreePtr to, unsigned varNum);
void genComputeReg (GenTreePtr tree,
regMaskTP needReg,
RegSet::ExactReg mustReg,
RegSet::KeepReg keepReg,
bool freeOnly = false);
void genCompIntoFreeReg (GenTreePtr tree,
regMaskTP needReg,
RegSet::KeepReg keepReg);
void genReleaseReg (GenTreePtr tree);
void genRecoverReg (GenTreePtr tree,
regMaskTP needReg,
RegSet::KeepReg keepReg);
void genMoveRegPairHalf (GenTreePtr tree,
regNumber dst,
regNumber src,
int off = 0);
void genMoveRegPair (GenTreePtr tree,
regMaskTP needReg,
regPairNo newPair);
void genComputeRegPair (GenTreePtr tree,
regPairNo needRegPair,
regMaskTP avoidReg,
RegSet::KeepReg keepReg,
bool freeOnly = false);
void genCompIntoFreeRegPair(GenTreePtr tree,
regMaskTP avoidReg,
RegSet::KeepReg keepReg);
void genComputeAddressable(GenTreePtr tree,
regMaskTP addrReg,
RegSet::KeepReg keptReg,
regMaskTP needReg,
RegSet::KeepReg keepReg,
bool freeOnly = false);
void genReleaseRegPair (GenTreePtr tree);
void genRecoverRegPair (GenTreePtr tree,
regPairNo regPair,
RegSet::KeepReg keepReg);
void genEvalIntoFreeRegPair(GenTreePtr tree,
regPairNo regPair,
regMaskTP avoidReg);
void genMakeRegPairAvailable(regPairNo regPair);
bool genMakeIndAddrMode (GenTreePtr addr,
GenTreePtr oper,
bool forLea,
regMaskTP regMask,
RegSet::KeepReg keepReg,
regMaskTP * useMaskPtr,
bool deferOp = false);
regMaskTP genMakeRvalueAddressable(GenTreePtr tree,
regMaskTP needReg,
RegSet::KeepReg keepReg,
bool forLoadStore,
bool smallOK = false);
regMaskTP genMakeAddressable (GenTreePtr tree,
regMaskTP needReg,
RegSet::KeepReg keepReg,
bool smallOK = false,
bool deferOK = false);
regMaskTP genMakeAddrArrElem (GenTreePtr arrElem,
GenTreePtr tree,
regMaskTP needReg,
RegSet::KeepReg keepReg);
regMaskTP genMakeAddressable2 (GenTreePtr tree,
regMaskTP needReg,
RegSet::KeepReg keepReg,
bool forLoadStore,
bool smallOK = false,
bool deferOK = false,
bool evalSideEffs = false);
bool genStillAddressable (GenTreePtr tree);
regMaskTP genRestoreAddrMode (GenTreePtr addr,
GenTreePtr tree,
bool lockPhase);
regMaskTP genRestAddressable (GenTreePtr tree,
regMaskTP addrReg,
regMaskTP lockMask);
regMaskTP genKeepAddressable (GenTreePtr tree,
regMaskTP addrReg,
regMaskTP avoidMask = RBM_NONE);
void genDoneAddressable (GenTreePtr tree,
regMaskTP addrReg,
RegSet::KeepReg keptReg);
GenTreePtr genMakeAddrOrFPstk (GenTreePtr tree,
regMaskTP * regMaskPtr,
bool roundResult);
void genEmitGSCookieCheck(bool pushReg);
void genEvalSideEffects (GenTreePtr tree);
void genCondJump (GenTreePtr cond,
BasicBlock * destTrue = NULL,
BasicBlock * destFalse = NULL,
bool bStackFPFixup = true);
emitJumpKind genCondSetFlags (GenTreePtr cond);
void genJCC (genTreeOps cmp,
BasicBlock * block,
var_types type);
void genJccLongHi (genTreeOps cmp,
BasicBlock * jumpTrue,
BasicBlock * jumpFalse,
bool unsOper = false);
void genJccLongLo (genTreeOps cmp,
BasicBlock * jumpTrue,
BasicBlock * jumpFalse);
void genCondJumpLng (GenTreePtr cond,
BasicBlock * jumpTrue,
BasicBlock * jumpFalse,
bool bFPTransition = false);
bool genUse_fcomip();
void genTableSwitch (regNumber reg,
unsigned jumpCnt,
BasicBlock ** jumpTab);
regMaskTP WriteBarrier (GenTreePtr tgt,
GenTreePtr assignVal,
regMaskTP addrReg);
void genCodeForTreeConst (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg = RBM_NONE);
void genCodeForTreeLeaf (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg = RBM_NONE);
// If "tree" is a comma node, generates code for the left comma arguments,
// in order, returning the first right argument in the list that is not
// a comma node.
GenTreePtr genCodeForCommaTree (GenTreePtr tree);
void genCodeForTreeLeaf_GT_JMP (GenTreePtr tree);
static Compiler::fgWalkPreFn fgIsVarAssignedTo;
void genCodeForQmark (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
bool genCodeForQmarkWithCMOV (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
#ifdef _TARGET_XARCH_
void genCodeForMultEAX (GenTreePtr tree);
#endif
#ifdef _TARGET_ARM_
void genCodeForMult64 (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
#endif
void genCodeForTreeSmpBinArithLogOp (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForTreeSmpBinArithLogAsgOp (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForUnsignedMod (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForSignedMod (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForUnsignedDiv (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForSignedDiv (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForGeneralDivide (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForAsgShift (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForShift (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForRelop (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForTreeSmpOp (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg = RBM_NONE);
regNumber genIntegerCast(GenTree *tree, regMaskTP needReg, regMaskTP bestReg);
void genCodeForNumericCast(GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg);
void genCodeForTreeSmpOp_GT_ADDR (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg = RBM_NONE);
void genCodeForTreeSmpOpAsg (GenTreePtr tree);
void genCodeForTreeSmpOpAsg_DONE_ASSG(GenTreePtr tree,
regMaskTP addrReg,
regNumber reg,
bool ovfl);
void genCodeForTreeSpecialOp (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg = RBM_NONE);
void genCodeForTree (GenTreePtr tree,
regMaskTP destReg,
regMaskTP bestReg = RBM_NONE);
void genCodeForTree_DONE_LIFE (GenTreePtr tree,
regNumber reg)
{
/* We've computed the value of 'tree' into 'reg' */
assert(reg != 0xFEEFFAAFu);
assert(!IsUninitialized(reg));
genMarkTreeInReg(tree, reg);
}
void genCodeForTree_DONE_LIFE (GenTreePtr tree,
regPairNo regPair)
{
/* We've computed the value of 'tree' into 'regPair' */
genMarkTreeInRegPair(tree, regPair);
}
void genCodeForTree_DONE (GenTreePtr tree,
regNumber reg)
{
/* Check whether this subtree has freed up any variables */
genUpdateLife(tree);
genCodeForTree_DONE_LIFE(tree, reg);
}
void genCodeForTree_REG_VAR1 (GenTreePtr tree)
{
/* Value is already in a register */
regNumber reg = tree->gtRegNum;
gcInfo.gcMarkRegPtrVal(reg, tree->TypeGet());
genCodeForTree_DONE(tree, reg);
}
void genCodeForTreeLng (GenTreePtr tree,
regMaskTP needReg,
regMaskTP avoidReg);
regPairNo genCodeForLongModInt(GenTreePtr tree,
regMaskTP needReg);
unsigned genRegCountForLiveIntEnregVars(GenTreePtr tree);
#ifdef _TARGET_ARM_
void genStoreFromFltRetRegs (GenTreePtr tree);
void genLoadIntoFltRetRegs (GenTreePtr tree);
void genLdStFltRetRegsPromotedVar (LclVarDsc* varDsc, bool isLoadIntoFltReg);
#endif
#if CPU_HAS_FP_SUPPORT
void genRoundFpExpression(GenTreePtr op,
var_types type = TYP_UNDEF);
void genCodeForTreeFlt (GenTreePtr tree,
regMaskTP needReg = RBM_ALLFLOAT,
regMaskTP bestReg = RBM_NONE);
#endif
// FP stuff
#include "fp.h"
void genCodeForJumpTable (GenTreePtr tree);
void genCodeForSwitchTable (GenTreePtr tree);
void genCodeForSwitch (GenTreePtr tree);
regMaskTP genPushRegs (regMaskTP regs,
regMaskTP * byrefRegs,
regMaskTP * noRefRegs);
void genPopRegs (regMaskTP regs,
regMaskTP byrefRegs,
regMaskTP noRefRegs);
size_t genPushArgList (GenTreePtr call);
#ifdef _TARGET_ARM_
// We are generating code for a promoted struct local variable. Fill the next slot (register or
// 4-byte stack slot) with one or more field variables of the promoted struct local -- or 2 such slots
// if the next field is a 64-bit value.
// The arguments are:
// "arg" is the current argument node.
//
// "curArgTabEntry" arg table entry pointer for "arg".
//
// "promotedStructLocalVarDesc" describes the struct local being copied, assumed non-NULL.
//
// "fieldSize" is somewhat misnamed; it must be the element in the struct's GC layout describing the next slot
// of the struct -- it will be EA_4BYTE, EA_GCREF, or EA_BYREF.
//
// "*pNextPromotedStructFieldVar" must be the the local variable number of the next field variable to copy;
// this location will be updated by the call to reflect the bytes that are copied.
//
// "*pBytesOfNextSlotOfCurPromotedStruct" must be the number of bytes within the struct local at which the next
// slot to be copied starts. This location will be updated by the call to reflect the bytes that are copied.
//
// "*pCurRegNum" must be the current argument register number, and will be updated if argument registers are filled.
//
// "argOffset" must be the offset of the next slot to be filled in the outgoing argument area, if the argument is to be
// put in the outgoing arg area of the stack (or else should be INT_MAX if the next slot to be filled is a register).
// (Strictly speaking, after the addition of "argOffsetOfFirstStackSlot", this arg is redundant, and is only used
// in assertions, and could be removed.)
//
// "fieldOffsetOfFirstStackSlot" must be the offset within the promoted struct local of the first slot that should be
// copied to the outgoing argument area -- non-zero only in the case of a struct that spans registers and stack slots.
//
// "argOffsetOfFirstStackSlot" must be the 4-byte-aligned offset of the first offset in the outgoing argument area which could
// contain part of the struct. (Explicit alignment may mean it doesn't actually contain part of the struct.)
//
// "*deadFieldVarRegs" is an out parameter, the set of registers containing promoted field variables that become dead after
// this (implicit) use.
//
// "*pRegTmp" -- if a temporary register is needed, and this is not REG_STK, uses that register. Otherwise, if it is REG_STK,
// allocates a register, uses it, and sets "*pRegTmp" to the allocated register.
//
// Returns "true" iff it filled two slots with an 8-byte value.
bool genFillSlotFromPromotedStruct(GenTreePtr arg,
fgArgTabEntryPtr curArgTabEntry,
LclVarDsc* promotedStructLocalVarDesc,
emitAttr fieldSize,
unsigned* pNextPromotedStructFieldVar, // IN/OUT
unsigned *pBytesOfNextSlotOfCurPromotedStruct, // IN/OUT
regNumber* pCurRegNum, // IN/OUT
int argOffset,
int fieldOffsetOfFirstStackSlot,
int argOffsetOfFirstStackSlot,
regMaskTP* deadFieldVarRegs, // OUT
regNumber* pRegTmp); // IN/OUT
#endif // _TARGET_ARM_
// Requires that "curr" is a cpblk. If the RHS is a promoted struct local,
// then returns a regMaskTP representing the set of registers holding
// fieldVars of the RHS that go dead with this use (as determined by the live set
// of cpBlk).
regMaskTP genFindDeadFieldRegs(GenTreePtr cpBlk);
void SetupLateArgs (GenTreePtr call);
#ifdef _TARGET_ARM_
void PushMkRefAnyArg (GenTreePtr mkRefAnyTree,
fgArgTabEntryPtr curArgTabEntry,
regMaskTP regNeedMask);
#endif // _TARGET_ARM_
regMaskTP genLoadIndirectCallTarget(GenTreePtr call);
regMaskTP genCodeForCall (GenTreePtr call,
bool valUsed);
GenTreePtr genGetAddrModeBase (GenTreePtr tree);
GenTreePtr genIsAddrMode (GenTreePtr tree,
GenTreePtr * indxPtr);
private:
bool genIsLocalLastUse (GenTreePtr tree);
bool genIsRegCandidateLocal(GenTreePtr tree);
//=========================================================================
// Debugging support
//=========================================================================
#if FEATURE_STACK_FP_X87
/*
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XX XX
XX Flat FP model XX
XX XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
*/
bool StackFPIsSameAsFloat (double d);
bool FlatFPSameRegisters (FlatFPStateX87* pState, regMaskTP mask);
// FlatFPStateX87_ functions are the actual verbs to do stuff
// like doing a transition, loading register, etc. It's also
// responsible for emitting the x87 code to do so. We keep
// them in Compiler because we don't want to store a pointer to the
// emitter.
void FlatFPX87_Kill (FlatFPStateX87* pState, unsigned iVirtual);
void FlatFPX87_PushVirtual (FlatFPStateX87* pState, unsigned iRegister, bool bEmitCode = true);
unsigned FlatFPX87_Pop (FlatFPStateX87* pState, bool bEmitCode = true);
unsigned FlatFPX87_Top (FlatFPStateX87* pState, bool bEmitCode = true);
void FlatFPX87_Unload (FlatFPStateX87* pState, unsigned iVirtual, bool bEmitCode = true);
#endif
// Codegen functions. This is the API that codegen will use
regMaskTP genPushArgumentStackFP (GenTreePtr arg);
void genRoundFpExpressionStackFP (GenTreePtr op, var_types type = TYP_UNDEF);
void genCodeForTreeStackFP_Const (GenTreePtr tree);
void genCodeForTreeStackFP_Leaf (GenTreePtr tree);
void genCodeForTreeStackFP_SmpOp (GenTreePtr tree);
void genCodeForTreeStackFP_Special (GenTreePtr tree);
void genCodeForTreeStackFP_Cast (GenTreePtr tree);
void genCodeForTreeStackFP (GenTreePtr tree);
void genCondJumpFltStackFP (GenTreePtr cond,
BasicBlock * jumpTrue,
BasicBlock * jumpFalse,
bool bDoTransition = true);
void genCondJumpFloat (GenTreePtr cond,
BasicBlock * jumpTrue,
BasicBlock * jumpFalse);
void genCondJumpLngStackFP (GenTreePtr cond,
BasicBlock * jumpTrue,
BasicBlock * jumpFalse);
void genFloatConst(GenTree *tree, RegSet::RegisterPreference *pref);
void genFloatLeaf(GenTree *tree, RegSet::RegisterPreference *pref);
void genFloatSimple(GenTree *tree, RegSet::RegisterPreference *pref);
void genFloatMath(GenTree *tree, RegSet::RegisterPreference *pref);
void genFloatCheckFinite(GenTree *tree, RegSet::RegisterPreference *pref);
void genLoadFloat(GenTreePtr tree, regNumber reg);
void genFloatAssign(GenTree *tree);
void genFloatArith(GenTree *tree, RegSet::RegisterPreference *pref);
void genFloatAsgArith(GenTree *tree);
regNumber genAssignArithFloat(genTreeOps oper,
GenTreePtr dst, regNumber dstreg,
GenTreePtr src, regNumber srcreg);
GenTreePtr genMakeAddressableFloat(GenTreePtr tree,
regMaskTP * regMaskIntPtr, regMaskTP * regMaskFltPtr,
bool bCollapseConstantDoubles = true);
void genCodeForTreeFloat(GenTreePtr tree,
RegSet::RegisterPreference *pref = NULL);
void genCodeForTreeFloat(GenTreePtr tree,
regMaskTP needReg, regMaskTP bestReg);
regNumber genArithmFloat(genTreeOps oper,
GenTreePtr dst, regNumber dstreg,
GenTreePtr src, regNumber srcreg,
bool bReverse);
void genCodeForTreeCastFloat(GenTreePtr tree, RegSet::RegisterPreference *pref);
void genCodeForTreeCastToFloat(GenTreePtr tree, RegSet::RegisterPreference *pref);
void genCodeForTreeCastFromFloat(GenTreePtr tree, RegSet::RegisterPreference *pref);
void genKeepAddressableFloat(GenTreePtr tree, regMaskTP * regMaskIntPtr, regMaskTP * regMaskFltPtr);
void genDoneAddressableFloat(GenTreePtr tree, regMaskTP addrRegInt, regMaskTP addrRegFlt, RegSet::KeepReg keptReg);
void genComputeAddressableFloat(GenTreePtr tree, regMaskTP addrRegInt, regMaskTP addrRegFlt, RegSet::KeepReg keptReg, regMaskTP needReg, RegSet::KeepReg keepReg, bool freeOnly = false);
void genRoundFloatExpression(GenTreePtr op, var_types type);
#if FEATURE_STACK_FP_X87
// Assumes then block will be generated before else block.
struct QmarkStateStackFP
{
FlatFPStateX87 stackState;
};
void genQMarkRegVarTransition (GenTreePtr nextNode, VARSET_VALARG_TP liveset);
void genQMarkBeforeElseStackFP (QmarkStateStackFP* pState, VARSET_VALARG_TP varsetCond, GenTreePtr nextNode);
void genQMarkAfterElseBlockStackFP (QmarkStateStackFP* pState, VARSET_VALARG_TP varsetCond, GenTreePtr nextNode);
void genQMarkAfterThenBlockStackFP (QmarkStateStackFP* pState);
#endif
GenTreePtr genMakeAddressableStackFP (GenTreePtr tree, regMaskTP * regMaskIntPtr, regMaskTP * regMaskFltPtr, bool bCollapseConstantDoubles = true);
void genKeepAddressableStackFP (GenTreePtr tree, regMaskTP * regMaskIntPtr, regMaskTP * regMaskFltPtr);
void genDoneAddressableStackFP (GenTreePtr tree, regMaskTP addrRegInt, regMaskTP addrRegFlt, RegSet::KeepReg keptReg);
void genCodeForTreeStackFP_Asg (GenTreePtr tree);
void genCodeForTreeStackFP_AsgArithm (GenTreePtr tree);
void genCodeForTreeStackFP_Arithm (GenTreePtr tree);
void genCodeForTreeStackFP_DONE (GenTreePtr tree, regNumber reg);
void genCodeForTreeFloat_DONE (GenTreePtr tree, regNumber reg);
void genSetupStateStackFP (BasicBlock* block);
regMaskTP genRegMaskFromLivenessStackFP (VARSET_VALARG_TP varset);
// bReverse means make op1 addressable and codegen for op2.
// If op1 or op2 are comma expressions, will do code-gen for their non-last comma parts,
// and set op1 and op2 to the remaining non-comma expressions.
void genSetupForOpStackFP (GenTreePtr& op1, GenTreePtr& op2,
bool bReverse,
bool bMakeOp1Addressable,
bool bOp1ReadOnly,
bool bOp2ReadOnly);
#if FEATURE_STACK_FP_X87
#ifdef DEBUG
bool ConsistentAfterStatementStackFP ();
#endif
private:
void SpillTempsStackFP (regMaskTP canSpillMask);
void SpillForCallStackFP ();
void UnspillRegVarsStackFp ();
// Transition API. Takes care of the stack matching of basicblock boundaries
void genCodeForPrologStackFP ();
void genCodeForEndBlockTransitionStackFP (BasicBlock* block);
void genCodeForBBTransitionStackFP (BasicBlock* pDst);
void genCodeForTransitionStackFP (FlatFPStateX87* pSrc, FlatFPStateX87* pDst);
void genCodeForTransitionFromMask (FlatFPStateX87* pSrc, regMaskTP mask, bool bEmitCode = true);
BasicBlock* genTransitionBlockStackFP (FlatFPStateX87* pState, BasicBlock* pFrom, BasicBlock* pTarget);
// This is the API codegen will use to emit virtual fp code. In theory, nobody above this API
// should know about x87 instructions.
int genNumberTemps ();
void genDiscardStackFP (GenTreePtr tree);
void genRegRenameWithMasks (regNumber dstReg, regNumber srcReg);
void genRegVarBirthStackFP (GenTreePtr tree);
void genRegVarBirthStackFP (LclVarDsc* varDsc);
void genRegVarDeathStackFP (GenTreePtr tree);
void genRegVarDeathStackFP (LclVarDsc* varDsc);
void genLoadStackFP (GenTreePtr tree, regNumber reg);
void genMovStackFP (GenTreePtr dst, regNumber dstreg, GenTreePtr src, regNumber srcreg);
bool genCompInsStackFP (GenTreePtr tos, GenTreePtr other);
regNumber genArithmStackFP (genTreeOps oper, GenTreePtr dst, regNumber dstreg, GenTreePtr src, regNumber srcreg, bool bReverse);
regNumber genAsgArithmStackFP (genTreeOps oper, GenTreePtr dst, regNumber dstreg, GenTreePtr src, regNumber srcreg);
void genCondJmpInsStackFP (emitJumpKind jumpKind,
BasicBlock * jumpTrue,
BasicBlock * jumpFalse,
bool bDoTransition = true);
void genTableSwitchStackFP (regNumber reg,
unsigned jumpCnt,
BasicBlock ** jumpTab);
void JitDumpFPState ();
#else // !FEATURE_STACK_FP_X87
void SpillForCallRegisterFP (regMaskTP noSpillMask);
#endif // !FEATURE_STACK_FP_X87
// When bOnlyNoMemAccess = true, the load will be generated only for constant loading that doesn't
// involve memory accesses, (ie: fldz for positive zero, or fld1 for 1). Will return true the function
// did the load
bool genConstantLoadStackFP (GenTreePtr tree,
bool bOnlyNoMemAccess = false);
void genEndOfStatement ();
#if FEATURE_STACK_FP_X87
struct genRegVarDiesInSubTreeData
{
regNumber reg;
bool result;
};
static Compiler::fgWalkPreFn genRegVarDiesInSubTreeWorker;
bool genRegVarDiesInSubTree (GenTreePtr tree, regNumber reg);
#endif // FEATURE_STACK_FP_X87
// Float spill
void UnspillFloat (RegSet::SpillDsc *spillDsc);
void UnspillFloat (GenTreePtr tree);
void UnspillFloat (LclVarDsc * varDsc);
void UnspillFloatMachineDep (RegSet::SpillDsc *spillDsc);
void UnspillFloatMachineDep (RegSet::SpillDsc* spillDsc, bool useSameReg);
void RemoveSpillDsc (RegSet::SpillDsc* spillDsc);
protected :
struct genLivenessSet
{
VARSET_TP liveSet;
VARSET_TP varPtrSet;
regMaskSmall maskVars;
regMaskSmall gcRefRegs;
regMaskSmall byRefRegs;
genLivenessSet() : VARSET_INIT_NOCOPY(liveSet, VarSetOps::UninitVal()),
VARSET_INIT_NOCOPY(varPtrSet, VarSetOps::UninitVal())
{}
};
void saveLiveness (genLivenessSet * ls);
void restoreLiveness (genLivenessSet * ls);
void checkLiveness (genLivenessSet * ls);
void unspillLiveness (genLivenessSet * ls);
#endif // LEGACY_BACKEND
#endif _CODEGENCLASSIC_H_