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Implement the findings about CR and lrs/srs in LLE plugin. Don't hear any difference in the few games i tried.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3480 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard 2009-06-17 21:08:49 +00:00
parent 51cbdea782
commit 28122e0a9b
1 changed files with 8 additions and 2 deletions
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10
Source/Core/DSPCore/Src/DspIntLoadStore.cpp
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@ -28,12 +28,15 @@ namespace DSPInterpreter {
// 0010 1sss mmmm mmmm
// Store value from register $(0x18+S) to a memory pointed by address M.
// (8-bit sign extended).
// ALTERNATIVELY: It now seems that the upper 8 bits are controlled
// by CR, not sign extension.
// FIXME: Perform additional operation depending on destination register.
// Note: pc+=2 in duddie's doc seems wrong
void srs(const UDSPInstruction& opc)
{
u8 reg = ((opc.hex >> 8) & 0x7) + 0x18;
u16 addr = (u16)(s16)(s8)opc.hex;
// u16 addr = (u16)(s16)(s8)opc.hex;
u16 addr = (g_dsp.r[DSP_REG_CR] << 8) | (opc.hex & 0xFF);
dsp_dmem_write(addr, g_dsp.r[reg]);
}
@ -41,12 +44,15 @@ void srs(const UDSPInstruction& opc)
// 0010 0ddd mmmm mmmm
// Move value from data memory pointed by address M (8-bit sign
// extended) to register $(0x18+D).
// ALTERNATIVELY: It now seems that the upper 8 bits are controlled
// by CR, not sign extension.
// FIXME: Perform additional operation depending on destination register.
// Note: pc+=2 in duddie's doc seems wrong
void lrs(const UDSPInstruction& opc)
{
u8 reg = ((opc.hex >> 8) & 0x7) + 0x18;
u16 addr = (u16)(s16)(s8)opc.hex;
//u16 addr = (u16)(s16)(s8)opc.hex;
u16 addr = (g_dsp.r[DSP_REG_CR] << 8) | (opc.hex & 0xFF);
g_dsp.r[reg] = dsp_dmem_read(addr);
}