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dsp16: Simplification (nw)

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Thanks for fixing the U64 compile issues earlier, Kale!
This commit is contained in:
Andrew Gardner 2013-01-05 20:45:14 +00:00
parent 035a7fe8e8
commit e8c759d6aa
2 changed files with 30 additions and 18 deletions
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1
src/emu/cpu/dsp16/dsp16.h
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@ -115,6 +115,7 @@ protected:
// helpers
void* addressYL();
//void writeYxRegister(const UINT16& value);
void writeRegister(void* reg, const UINT16& value);
};

47
src/emu/cpu/dsp16/dsp16ops.c
View file

@ -4,9 +4,36 @@
// The YL register is the lower half of the 32 bit Y register
void* dsp16_device::addressYL()
{
return (((UINT8*)&m_y)+0x4);
return (((UINT8*)&m_y) + 2);
}
void dsp16_device::writeRegister(void* reg, const UINT16 &value)
{
if (reg == &m_auc || reg == &m_c0 || reg == &m_c1 || reg == &m_c2)
{
*(UINT8*)reg = value & 0x00ff; // 8 bit registers
}
else if (reg == &m_i)
{
m_i = value & 0x0fff; // 12 bit register
}
else if (reg == &m_y)
{
//writeYxRegister(value); // TODO - check a flag to see if clearing yl is necessary
m_y = (value << 16) | (m_y & 0x0000ffff); // Temporary
}
else if (reg == addressYL())
{
m_y = value | (m_y & 0xffff0000); // Temporary
}
else
{
*(UINT16*)reg = value; // The rest
}
}
void* dsp16_device::registerFromRTable(const UINT8 &R)
{
switch (R)
@ -258,23 +285,7 @@ void dsp16_device::execute_one(const UINT16& op, UINT8& cycles, UINT8& pcAdvance
const UINT8 R = (op & 0x03f0) >> 4;
const UINT16 iVal = opcode_read(1);
void* reg = registerFromRTable(R);
if (reg == &m_auc || reg == &m_c0 || reg == &m_c1 || reg == &m_c2)
{
*(UINT8*)reg = iVal & 0x00ff; // 8 bit registers
}
else if (reg == &m_i)
{
*(UINT16*)reg = iVal & 0x0fff; // 12 bit register
}
else if (reg == &m_y || reg == addressYL())
{
*(UINT16*)reg = iVal; // Temporary
//writeYxRegister(iVal); // TODO
}
else
{
*(UINT16*)reg = iVal; // The rest
}
writeRegister(reg, iVal);
cycles = 2;
pcAdvance = 2;