os9x_asm_cpu.cpp

#include "snes9x.h"
#include "apu.h"
#include "ppu.h"
#include "cpuexec.h"
//#include "cpuops.h"

#include "os9x_asm_cpu.h"

//#define __debug_c_irq__
//#define __debug_c_nmi__
//#define __debug_c_hblank__
//#define __debug_c_io__

START_EXTERN_C

void asm_S9xSetPCBase(uint32 Address)
{
#ifdef __debug_c_setpc__
	printf("spcb\n");
#endif
	S9xSetPCBase(Address);	
}


#if 0
#define PushW(w) \
    S9xSetWord (w, Registers.S.W - 1);\
    Registers.S.W -= 2;
#define PushB(b)\
    S9xSetByte (b, Registers.S.W--);


void asm_S9xMainLoop(void)
{
	//S9xPackStatus();
	//printf("asmMainLoop Enter(0x%08x).\n", CPU.Flags);
	asmMainLoop(&CPU);
	//printf("asmMainLoop Exit(0x%08x, %d).\n", CPU.PC - CPU.PCBase, CPU.Cycles);
	//S9xUnpackStatus();	
}

void asm_S9xDoHBlankProcessing(void)
{	
#ifdef __debug_c_hblank__
	printf("hblank\n");
#endif	
//	S9xUnpackStatus(); // not needed
	S9xDoHBlankProcessing();	
//	S9xPackStatus();	
}


uint8 asm_S9xGetByte(uint32 Address)
{
#ifdef __debug_c_io__
	printf("gb\n");
#endif	
	return S9xGetByte(Address);	
}

uint16 asm_S9xGetWord(uint32 Address)
{
#ifdef __debug_c_io__
	printf("gw\n");
#endif	
	return S9xGetWord(Address);	
}


void asm_S9xSetByte(uint32 Address,uint8 value)
{	
#ifdef __debug_c_io__
	printf("sb\n");		
#endif
	S9xSetByte(value,Address);	
}

void asm_S9xSetWord(uint32 Address,uint16 value)
{	
#ifdef __debug_c_io__
	printf("sw\n");
#endif	
	S9xSetWord(value,Address);
}


void asm_S9xOpcode_NMI(void)
{	
#ifdef __debug_c_nmi__
	printf("nmi\n");
#endif	
//	S9xUnpackStatus(); // not needed

	if (!CheckEmulation())
    {
	PushB (Registers.PB);
	PushW (CPU.PC - CPU.PCBase);
//	S9xPackStatus ();
	PushB (Registers.PL);
	ClearDecimal ();
	SetIRQ ();

	Registers.PB = 0;
//	c = 0; // unused
#ifdef USE_SA1
	if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x20))
	    S9xSetPCBase (Memory.FillRAM [0x220c] |
			  (Memory.FillRAM [0x220d] << 8));
	else
#endif
		S9xSetPCBase (S9xGetWord (0xFFEA));
#ifdef VAR_CYCLES
	CPU.Cycles += TWO_CYCLES;
#else
	CPU.Cycles += 8;
#endif
    }
    else
    {
	PushW (CPU.PC - CPU.PCBase);
//	S9xPackStatus (); // not needed
	PushB (Registers.PL);
	ClearDecimal ();
	SetIRQ ();

	Registers.PB = 0;
//	ICPU.ShiftedPB = 0; // unused
#ifdef USE_SA1
	if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x20))
	    S9xSetPCBase (Memory.FillRAM [0x220c] |
			  (Memory.FillRAM [0x220d] << 8));
	else
#endif
	    S9xSetPCBase (S9xGetWord (0xFFFA));
#ifdef VAR_CYCLES
	CPU.Cycles += ONE_CYCLE;
#else
	CPU.Cycles += 6;
#endif
    }

//	S9xPackStatus(); // not needed
}

void asm_S9xOpcode_IRQ(void)
{
#ifdef __debug_c_irq__
	printf("irq\n");
#endif	
//	S9xUnpackStatus(); // not needed

    if (!CheckEmulation())
    {
	PushB (Registers.PB);
	PushW (CPU.PC - CPU.PCBase);
//	S9xPackStatus (); // not needed
	PushB (Registers.PL);
	ClearDecimal ();
	SetIRQ ();

	Registers.PB = 0;
//	ICPU.ShiftedPB = 0; // unused

#ifdef USE_SA1
	if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x40))
	    S9xSetPCBase (Memory.FillRAM [0x220e] | 
			  (Memory.FillRAM [0x220f] << 8));
	else
#endif
		S9xSetPCBase (S9xGetWord (0xFFEE));
#ifdef VAR_CYCLES
        CPU.Cycles += TWO_CYCLES;
#else
	CPU.Cycles += 8;
#endif
    }
    else
    {
	PushW (CPU.PC - CPU.PCBase);
//	S9xPackStatus (); // not needed
	PushB (Registers.PL);
	ClearDecimal ();
	SetIRQ ();

	Registers.PB = 0;
//	ICPU.ShiftedPB = 0; // unused

#ifdef USE_SA1
	if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x40))
	    S9xSetPCBase (Memory.FillRAM [0x220e] | 
			  (Memory.FillRAM [0x220f] << 8));
	else
#endif
		S9xSetPCBase (S9xGetWord (0xFFFE));
#ifdef VAR_CYCLES
	CPU.Cycles += ONE_CYCLE;
#else
	CPU.Cycles += 6;
#endif
    }
	
//	S9xPackStatus(); // not needed
}
#endif


#ifndef ASM_SPC700

void asm_APU_EXECUTE(void)
{
#ifdef __debug_c_apuex__	
	printf("apuexec\n");
#endif
	if(CPU.APU_APUExecuting != 1) return;

	while (CPU.APU_Cycles <= CPU.Cycles)
	{
		APU_EXECUTE1();
	}
}

void asm_APU_EXECUTE2(void)
{
	if(CPU.APU_APUExecuting != 1) return;

	ICPU.CPUExecuting = FALSE;
	do
	{
	    APU_EXECUTE1();
	} while (CPU.APU_Cycles < CPU.NextEvent);
	ICPU.CPUExecuting = TRUE;
}

#endif

END_EXTERN_C