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Use saveNext unwind opcode on arm64. #21683

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Jan 8, 2019
Merged

Use saveNext unwind opcode on arm64. #21683

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e3627fd
Use `saveNext` opcode on arm64.
Dec 13, 2018
b6ca00f
Support using of `save_next` on int/float border.
Jan 3, 2019
fa5923e
Delete the extra requirement that an epilog sequences can't start fro…
Jan 3, 2019
aed2a96
response feedback
Jan 4, 2019
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2 changes: 1 addition & 1 deletion src/jit/arraystack.h
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Original file line number Diff line number Diff line change
Expand Up @@ -122,7 +122,7 @@ class ArrayStack
}

// return a reference to the i'th from the bottom
T BottomRef(int indx)
T& BottomRef(int indx)
{
assert(tosIndex > indx);
return data[indx];
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29 changes: 18 additions & 11 deletions src/jit/codegen.h
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Expand Up @@ -287,14 +287,19 @@ class CodeGen : public CodeGenInterface
regNumber reg2,
int spOffset,
int spDelta,
bool lastSavedWasPreviousPair,
bool useSaveNextPair,
regNumber tmpReg,
bool* pTmpRegIsZero);

void genPrologSaveReg(regNumber reg1, int spOffset, int spDelta, regNumber tmpReg, bool* pTmpRegIsZero);

void genEpilogRestoreRegPair(
regNumber reg1, regNumber reg2, int spOffset, int spDelta, regNumber tmpReg, bool* pTmpRegIsZero);
void genEpilogRestoreRegPair(regNumber reg1,
regNumber reg2,
int spOffset,
int spDelta,
bool useSaveNextPair,
regNumber tmpReg,
bool* pTmpRegIsZero);

void genEpilogRestoreReg(regNumber reg1, int spOffset, int spDelta, regNumber tmpReg, bool* pTmpRegIsZero);

Expand All @@ -307,27 +312,29 @@ class CodeGen : public CodeGenInterface
{
regNumber reg1;
regNumber reg2;
bool useSaveNextPair;

RegPair(regNumber reg1) : reg1(reg1), reg2(REG_NA)
RegPair(regNumber reg1) : reg1(reg1), reg2(REG_NA), useSaveNextPair(false)
{
}

RegPair(regNumber reg1, regNumber reg2) : reg1(reg1), reg2(reg2)
RegPair(regNumber reg1, regNumber reg2) : reg1(reg1), reg2(reg2), useSaveNextPair(false)
{
assert(reg2 == REG_NEXT(reg1));
}
};

static void genBuildRegPairsStack(regMaskTP regsMask, ArrayStack<RegPair>* regStack);
static void genSetUseSaveNextPairs(ArrayStack<RegPair>* regStack);

static int genGetSlotSizeForRegsInMask(regMaskTP regsMask);

int genSaveCalleeSavedRegisterGroup(regMaskTP regsMask,
int spDelta,
int spOffset DEBUGARG(bool isRegsToSaveCountOdd));
int genRestoreCalleeSavedRegisterGroup(regMaskTP regsMask,
int spDelta,
int spOffset DEBUGARG(bool isRegsToRestoreCountOdd));
void genSaveCalleeSavedRegisterGroup(regMaskTP regsMask,
int spDelta,
int spOffset DEBUGARG(bool isRegsToSaveCountOdd));
void genRestoreCalleeSavedRegisterGroup(regMaskTP regsMask,
int spDelta,
int spOffset DEBUGARG(bool isRegsToRestoreCountOdd));

void genSaveCalleeSavedRegistersHelp(regMaskTP regsToSaveMask, int lowestCalleeSavedOffset, int spDelta);
void genRestoreCalleeSavedRegistersHelp(regMaskTP regsToRestoreMask, int lowestCalleeSavedOffset, int spDelta);
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