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Remove useless backup enabled checks in read handlers. 

Fix illegal halfword and byte reads.
This commit is contained in:
normmatt234 2013-10-22 18:04:02 +00:00
parent 2404d08f1f
commit 9e8671042b
1 changed files with 27 additions and 48 deletions
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75
src/gba/GBAinline.h
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@ -114,20 +114,11 @@ static inline u32 CPUReadMemory(u32 address)
value = READ32LE(((u32 *)&rom[address&0x1FFFFFC]));
break;
case 13:
if(cpuEEPROMEnabled)
// no need to swap this
return eepromRead(address);
goto unreadable;
value = eepromRead(address);
break;
case 14:
case 15:
if(cpuFlashEnabled | cpuSramEnabled)
{ // no need to swap this
#ifdef __libretro__
return flashRead(address);
#else
value = flashRead(address) * 0x01010101;
#endif
}
value = flashRead(address) * 0x01010101;
break;
// default
default:
@ -269,21 +260,12 @@ static inline u32 CPUReadHalfWord(u32 address)
value = READ16LE(((u16 *)&rom[address & 0x1FFFFFE]));
break;
case 13:
if(cpuEEPROMEnabled)
// no need to swap this
return eepromRead(address);
goto unreadable;
value = eepromRead(address);
break;
case 14:
case 15:
if(cpuFlashEnabled | cpuSramEnabled)
// no need to swap this
{
#ifdef __libretro__
return flashRead(address);
#else
value = flashRead(address) * 0x0101;
#endif
}
value = flashRead(address) * 0x0101;
break;
// default
default:
unreadable:
@ -291,10 +273,9 @@ unreadable:
value = cpuDmaLast & 0xFFFF;
} else {
if(armState) {
value = CPUReadMemoryQuick(reg[15].I);
value = CPUReadHalfWordQuick(reg[15].I + (address & 2));
} else {
value = CPUReadHalfWordQuick(reg[15].I) |
CPUReadHalfWordQuick(reg[15].I) << 16;
value = CPUReadHalfWordQuick(reg[15].I);
}
}
#ifdef GBA_LOGGING
@ -375,25 +356,24 @@ static inline u8 CPUReadByte(u32 address)
case 12:
return rom[address & 0x1FFFFFF];
case 13:
if(cpuEEPROMEnabled)
return eepromRead(address);
goto unreadable;
return eepromRead(address);
case 14:
case 15:
if(cpuSramEnabled | cpuFlashEnabled)
return flashRead(address);
if(cpuEEPROMSensorEnabled) {
switch(address & 0x00008f00) {
case 0x8200:
return systemGetSensorX() & 255;
case 0x8300:
return (systemGetSensorX() >> 8)|0x80;
case 0x8400:
return systemGetSensorY() & 255;
case 0x8500:
return systemGetSensorY() >> 8;
}
}
{
if (cpuEEPROMSensorEnabled) {
switch (address & 0x00008f00) {
case 0x8200:
return systemGetSensorX() & 255;
case 0x8300:
return (systemGetSensorX() >> 8) | 0x80;
case 0x8400:
return systemGetSensorY() & 255;
case 0x8500:
return systemGetSensorY() >> 8;
}
}
return flashRead(address);
}
// default
default:
unreadable:
@ -407,10 +387,9 @@ unreadable:
return cpuDmaLast & 0xFF;
} else {
if(armState) {
return CPUReadMemoryQuick(reg[15].I);
return CPUReadByteQuick(reg[15].I + (address & 3));
} else {
return CPUReadHalfWordQuick(reg[15].I) |
CPUReadHalfWordQuick(reg[15].I) << 16;
return CPUReadByteQuick(reg[15].I + (address & 1));
}
}
}