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more doc and small fix

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2911 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
nakeee 2009-04-06 22:47:12 +00:00
parent cd439cdce0
commit f18718922e
1 changed files with 17 additions and 6 deletions
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23
Source/Plugins/Plugin_DSP_LLE-testing/Src/DSPInterpreter.cpp
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@ -450,7 +450,7 @@ void clr(const UDSPInstruction& opc)
void clrl(const UDSPInstruction& opc)
{
u16 reg = DSP_REG_ACL0 + ((opc.hex >> 11) & 0x1);
g_dsp.r[reg] &= 0xFF00;
g_dsp.r[reg] &= 0x0000;
// Should this be 64bit?
Update_SR_Register64((s64)reg);
@ -1154,13 +1154,15 @@ void asr(const UDSPInstruction& opc)
//-------------------------------------------------------------
// hcs give me this code!!
// DAR $arD
// 0000 0000 0000 01dd
// Decrement address register $arD.
// More docs needed - the operation is really odd!
// Decrement Address Register
void dar(const UDSPInstruction& opc)
{
int reg = opc.hex & 0x3;
int temp = g_dsp.r[reg] + g_dsp.r[8];
int temp = g_dsp.r[reg] + g_dsp.r[DSP_REG_R08];
if (temp <= 0x7ff) // ???
g_dsp.r[reg] = temp;
@ -1170,13 +1172,15 @@ void dar(const UDSPInstruction& opc)
// hcs give me this code!!
// IAR $arD
// 0000 0000 0000 10dd
// Increment address register $arD.
// More docs needed - the operation is really odd!
// Increment Address Register
void iar(const UDSPInstruction& opc)
{
int reg = opc.hex & 0x3;
int temp = g_dsp.r[reg] + g_dsp.r[8];
int temp = g_dsp.r[reg] + g_dsp.r[DSP_REG_R08];
if (temp <= 0x7ff) // ???
g_dsp.r[reg] = temp;
@ -1186,13 +1190,20 @@ void iar(const UDSPInstruction& opc)
//-------------------------------------------------------------
// SBCLR #I
// 0001 0011 0000 0iii
// bit of status register $sr. Bit number is calculated by adding 6 to
// immediate value I.
void sbclr(const UDSPInstruction& opc)
{
u8 bit = (opc.hex & 0xff) + 6;
g_dsp.r[DSP_REG_SR] &= ~(1 << bit);
}
// SBSET #I
// 0001 0010 0000 0iiii
// Set bit of status register $sr. Bit number is calculated by adding 6 to
// immediate value I.
void sbset(const UDSPInstruction& opc)
{
u8 bit = (opc.hex & 0xff) + 6;