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Optimizing byte code generator

This commit is contained in:
drmortalwombat 2021-11-06 17:57:24 +01:00
parent 417f65e2c2
commit f50eb7cd19
4 changed files with 104 additions and 8 deletions
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33
autotest/arraytest.c
View File

@ -45,12 +45,37 @@ void reverseb(int * d, const int * s, char n)
d[i] = s[n - i - 1];
}
long suml(long * a, char s)
{
long sum = 0;
for(char i=0; i<s; i++)
{
sum += a[i];
}
return sum;
}
void copyl(long * d, const long * s, char n)
{
for(char i=0; i<n ; i++)
d[i] = s[i];
}
void reversel(long * d, const long * s, char n)
{
for(char i=0; i<n ; i++)
d[i] = s[n - i - 1];
}
int main(void)
{
int a[100], b[100], c[100];
long al[100], bl[100], cl[100];
for(int i=0; i<100; i++)
{
a[i] = i % 10;
al[i] = i % 10;
}
assert(sum(a, 100) == 450);
@ -65,5 +90,13 @@ int main(void)
reverseb(c, a, 100);
assert(sumb(c, 100) == 450);
assert(suml(al, 100) == 450);
copyl(bl, al, 100);
assert(suml(bl, 100) == 450);
reversel(cl, al, 100);
assert(suml(cl, 100) == 450);
return 0;
}

2
oscar64/Disassembler.cpp
View File

@ -571,7 +571,7 @@ void ByteCodeDisassembler::Disassemble(FILE* file, const uint8* memory, int star
i += 2;
break;
case BC_STORE_ADDR_32:
fprintf(file, "MOV\t%d(ADDR), %s", memory[start + i + 1], TempName(memory[start + i + 0], tbuffer, proc));
fprintf(file, "MOVD\t%d(ADDR), %s", memory[start + i + 1], TempName(memory[start + i + 0], tbuffer, proc));
i += 2;
break;

76
oscar64/NativeCodeGenerator.cpp
View File

@ -542,6 +542,17 @@ bool NativeCodeInstruction::RequiresYReg(void) const
return false;
}
bool NativeCodeInstruction::RequiresXReg(void) const
{
if (mMode == ASMIM_ABSOLUTE_X || mMode == ASMIM_INDIRECT_X || mMode == ASMIM_ZERO_PAGE_X)
return true;
if (mType == ASMIT_TXA || mType == ASMIT_STX || mType == ASMIT_CPX || mType == ASMIT_INX || mType == ASMIT_DEX)
return true;
return false;
}
bool NativeCodeInstruction::ChangesYReg(void) const
{
return mType == ASMIT_TAY || mType == ASMIT_LDY || mType == ASMIT_INY || mType == ASMIT_DEY || mType == ASMIT_JSR;
@ -9133,18 +9144,34 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
#if 1
//
// move ldy down
// move ldx/y down
for (int i = 0; i + 1 < mIns.Size(); i++)
{
if (mIns[i].mType == ASMIT_LDY && mIns[i].mMode == ASMIM_IMMEDIATE)
if (mIns[i].mType == ASMIT_LDY)
{
if (!mIns[i + 1].RequiresYReg() && !mIns[i + 1].ChangesYReg() && !(mIns[i + 1].mLive & LIVE_CPU_REG_Z))
{
NativeCodeInstruction ins = mIns[i];
mIns[i] = mIns[i + 1];
mIns[i + 1] = ins;
mIns[i + 1].mLive |= mIns[i].mLive;
if (mIns[i].mMode == ASMIM_IMMEDIATE || !mIns[i + 1].ChangesAddress())
{
NativeCodeInstruction ins = mIns[i];
mIns[i] = mIns[i + 1];
mIns[i + 1] = ins;
mIns[i + 1].mLive |= mIns[i].mLive;
}
}
}
else if (mIns[i].mType == ASMIT_LDX)
{
if (!mIns[i + 1].RequiresXReg() && !mIns[i + 1].ChangesXReg() && !(mIns[i + 1].mLive & LIVE_CPU_REG_Z))
{
if (mIns[i].mMode == ASMIM_IMMEDIATE || !mIns[i + 1].ChangesAddress())
{
NativeCodeInstruction ins = mIns[i];
mIns[i] = mIns[i + 1];
mIns[i + 1] = ins;
mIns[i + 1].mLive |= mIns[i].mLive;
}
}
}
}
@ -9440,6 +9467,21 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
mIns[i + 0].mLive |= LIVE_CPU_REG_A;
progress = true;
}
#if 1
else if (
mIns[i + 0].mType == ASMIT_ASL && mIns[i + 0].mMode == ASMIM_ZERO_PAGE &&
mIns[i + 1].mType == ASMIT_LDY && mIns[i + 1].mMode == ASMIM_ZERO_PAGE && mIns[i + 0].mAddress == mIns[i + 1].mAddress && !(mIns[i + 1].mLive & (LIVE_MEM | LIVE_CPU_REG_A)))
{
mIns[i + 0].mType = ASMIT_LDA;
mIns[i + 0].mLive |= LIVE_CPU_REG_A;
mIns[i + 1].mType = ASMIT_ASL;
mIns[i + 1].mMode = ASMIM_IMPLIED;
mIns.Insert(i + 2, NativeCodeInstruction(ASMIT_TAY, ASMIM_IMPLIED));
mIns[i + 2].mLive = mIns[i + 1].mLive;
mIns[i + 1].mLive |= LIVE_CPU_REG_A;
progress = true;
}
#endif
else if (
mIns[i + 0].mType == ASMIT_TXA &&
mIns[i + 1].mType == ASMIT_STA && (mIns[i + 1].mMode == ASMIM_ZERO_PAGE || mIns[i + 1].mMode == ASMIM_ABSOLUTE))
@ -9512,7 +9554,24 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
mIns[i + 1].mType = ASMIT_NOP;
progress = true;
}
else if (
mIns[i + 0].mType == ASMIT_LDY && (mIns[i + 0].mMode == ASMIM_ZERO_PAGE || mIns[i + 0].mMode == ASMIM_ABSOLUTE) &&
mIns[i + 1].mType == ASMIT_TYA && !(mIns[i + 1].mLive & LIVE_CPU_REG_Y))
{
mIns[i + 0].mType = ASMIT_LDA; mIns[i + 0].mLive |= mIns[i + 1].mLive;
mIns[i + 1].mType = ASMIT_NOP;
progress = true;
}
else if (
mIns[i + 0].mType == ASMIT_LDX && (mIns[i + 0].mMode == ASMIM_ZERO_PAGE || mIns[i + 0].mMode == ASMIM_ABSOLUTE) &&
mIns[i + 1].mType == ASMIT_TXA && !(mIns[i + 1].mLive & LIVE_CPU_REG_X))
{
mIns[i + 0].mType = ASMIT_LDA; mIns[i + 0].mLive |= mIns[i + 1].mLive;
mIns[i + 1].mType = ASMIT_NOP;
progress = true;
}
#if 1
else if (
(mIns[i + 0].mType == ASMIT_ASL || mIns[i + 0].mType == ASMIT_LSR || mIns[i + 0].mType == ASMIT_ROL || mIns[i + 0].mType == ASMIT_ROR) && mIns[i + 0].mMode == ASMIM_ZERO_PAGE &&
mIns[i + 1].mType == ASMIT_LDA && mIns[i + 1].mMode == ASMIM_ZERO_PAGE && mIns[i + 1].mAddress == mIns[i + 0].mAddress && !(mIns[i + 1].mLive & LIVE_MEM))
@ -9524,6 +9583,8 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
mIns[i + 0].mType = ASMIT_LDA;
progress = true;
}
#endif
#if 1
else if (mIns[i + 0].mType == ASMIT_LDY && mIns[i + 0].mMode == ASMIM_IMMEDIATE && mIns[i + 1].mMode == ASMIM_INDIRECT_Y)
{
@ -9575,7 +9636,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
{
mIns[i + 0].mType = ASMIT_NOP;
mIns.Insert(apos, NativeCodeInstruction(ASMIT_LDY, ASMIM_ZERO_PAGE, iins->mAddress));
mIns[apos].mLive = LIVE_CPU_REG_Y;
mIns[apos].mLive = LIVE_CPU_REG_Y | LIVE_MEM;
}
else
{
@ -9825,6 +9886,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
else
{
mIns.Insert(i + 2, NativeCodeInstruction(ASMIT_LDY, ASMIM_ZERO_PAGE, ireg));
mIns[i + 2].mLive = mIns[i + 3].mLive | LIVE_CPU_REG_Y | LIVE_MEM;
mIns[i + 3].mAddress = breg;
}
progress = true;

1
oscar64/NativeCodeGenerator.h
View File

@ -76,6 +76,7 @@ public:
bool ChangesCarry(void) const;
bool RequiresAccu(void) const;
bool RequiresYReg(void) const;
bool RequiresXReg(void) const;
bool ChangesYReg(void) const;
bool ChangesXReg(void) const;
bool ChangesZeroPage(int address) const;