piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-07-21 05:09:34 -06:00
Code Issues Packages Projects Releases Wiki Activity

DSPLLE: attempt to fix extended ops please review this patch carefully.

Browse Source 
thinks to note
- All ext commands should call zeroWriteBackLog() (before changing any 
reg)
- increase/decrease ar functions now only return a value not actually 
change anything


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4018 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
nakeee
2009-08-19 21:37:24 +00:00
parent 8155439dd1
commit b787f5f8f7
9 changed files with 340 additions and 266 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
Source/Core/DSPCore/Src/DspIntMisc.cpp
View File

@ -97,7 +97,7 @@ void addarn(const UDSPInstruction& opc)
u8 dreg = opc.hex & 0x3;
u8 sreg = (opc.hex >> 2) & 0x3;
dsp_increase_addr_reg(dreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]);
g_dsp.r[dreg] = dsp_increase_addr_reg(dreg, (s16)g_dsp.r[DSP_REG_IX0 + sreg]);
// It is critical for the Zelda ucode that this one wraps correctly.
}
@ -107,6 +107,7 @@ void addarn(const UDSPInstruction& opc)
// No operation, but can be extended with extended opcode.
void nx(const UDSPInstruction& opc)
{
zeroWriteBackLog();
// This opcode is supposed to do nothing - it's used if you want to use
// an opcode extension but not do anything. At least according to duddie.
}
@ -117,7 +118,7 @@ void nx(const UDSPInstruction& opc)
// Decrement address register $arD.
void dar(const UDSPInstruction& opc)
{
dsp_decrement_addr_reg(opc.hex & 0x3);
g_dsp.r[opc.hex & 0x3] = dsp_decrement_addr_reg(opc.hex & 0x3);
}
// IAR $arD ?
@ -125,7 +126,7 @@ void dar(const UDSPInstruction& opc)
// Increment address register $arD.
void iar(const UDSPInstruction& opc)
{
dsp_increment_addr_reg(opc.hex & 0x3);
g_dsp.r[opc.hex & 0x3] = dsp_increment_addr_reg(opc.hex & 0x3);
}
// SBCLR #I
@ -153,6 +154,7 @@ void sbset(const UDSPInstruction& opc)
// but it's harder to know exactly what effect they have.
void srbith(const UDSPInstruction& opc)
{
zeroWriteBackLog();
switch ((opc.hex >> 8) & 0xf)
{
// M0/M2 change the multiplier mode (it can multiply by 2 for free).