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DSP: Move the condition code stuff to a separate file.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2873 8ced0084-cf51-0410-be5f-012b33b47a6e
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hrydgard
2009-04-05 12:20:30 +00:00
parent 6eb6db21ce
commit 7368d712d6
6 changed files with 212 additions and 132 deletions
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133
Source/Plugins/Plugin_DSP_LLE-testing/Src/DSPInterpreter.cpp
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@ -22,144 +22,13 @@
#include "Globals.h"
#include "gdsp_memory.h"
#include "gdsp_interpreter.h"
#include "gdsp_condition_codes.h"
#include "gdsp_registers.h"
#include "gdsp_opcodes_helper.h"
#include "gdsp_ext_op.h"
namespace DSPInterpreter {
// HELPER FUNCTIONS
void Update_SR_Register(s64 _Value)
{
g_dsp.r[R_SR] &= ~SR_CMP_MASK;
if (_Value < 0)
{
g_dsp.r[R_SR] |= 0x8;
}
if (_Value == 0)
{
g_dsp.r[R_SR] |= 0x4;
}
// logic
if ((_Value >> 62) == 0)
{
g_dsp.r[R_SR] |= 0x20;
}
}
void Update_SR_Register(s16 _Value)
{
g_dsp.r[R_SR] &= ~SR_CMP_MASK;
if (_Value < 0)
{
g_dsp.r[R_SR] |= 0x8;
}
if (_Value == 0)
{
g_dsp.r[R_SR] |= 0x4;
}
// logic
if ((_Value >> 14) == 0)
{
g_dsp.r[R_SR] |= 0x20;
}
}
s8 GetMultiplyModifier()
{
if (g_dsp.r[R_SR] & (1 << 13))
{
return(1);
}
return 2;
}
// 0x02 - overflow????
// 0x04 - Zero bit
// 0x08 - Sign bit
// 0x40 - Logical Zero bit
bool CheckCondition(u8 _Condition)
{
bool taken = false;
switch (_Condition & 0xf)
{
case 0x0: //NS - NOT SIGN
if (!(g_dsp.r[R_SR] & 0x08))
taken = true;
break;
case 0x1: // S - SIGN
if (g_dsp.r[R_SR] & 0x08)
taken = true;
break;
case 0x2: // G - GREATER
if ( (!(g_dsp.r[R_SR] & 0x02) || !(g_dsp.r[R_SR] & 0x04)) && !(g_dsp.r[R_SR] & 0x08))
taken = true;
break;
case 0x3: // LE - LESS EQUAL
if ((g_dsp.r[R_SR] & 0x02) || (g_dsp.r[R_SR] & 0x04) || (g_dsp.r[R_SR] & 0x08))
taken = true;
break;
case 0x4: // NZ - NOT ZERO
if (!(g_dsp.r[R_SR] & 0x04))
taken = true;
break;
case 0x5: // Z - ZERO
if (g_dsp.r[R_SR] & 0x04)
taken = true;
break;
case 0x6: // L - LESS
if ((g_dsp.r[R_SR] & 0x02) || (g_dsp.r[R_SR] & 0x08))
taken = true;
break;
case 0x7: // GE - GREATER EQUAL
if ( (!(g_dsp.r[R_SR] & 0x02) || (g_dsp.r[R_SR] & 0x04)) && !(g_dsp.r[R_SR] & 0x08))
break;
case 0xc: // LNZ - LOGIC NOT ZERO
if (!(g_dsp.r[R_SR] & 0x40))
taken = true;
break;
case 0xd: // LZ - LOGIC ZERO
if (g_dsp.r[R_SR] & 0x40)
taken = true;
break;
case 0xf: // Empty
taken = true;
break;
default:
ERROR_LOG(DSPHLE, "Unknown condition check: 0x%04x\n", _Condition & 0xf);
break;
}
return(taken);
}
// END OF HELPER FUNCTIONS