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DSP comments & minor reorganization (moved all DSP state into the g_dsp struct). No functionality change.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4813 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard
2010-01-12 21:38:39 +00:00
parent 532ab905c4
commit af08186daa
8 changed files with 117 additions and 79 deletions
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20
Source/Core/DSPCore/Src/DSPIntExtOps.cpp
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@ -427,11 +427,15 @@ void nop(const UDSPInstruction& opc)
} // end namespace ext
} // end namespace DSPInterpeter
// The Writebacklog needs more commenting. It seems to be a way of writing values from the
// "beginning" of the execution of an instruction, at the end of the execution.
void applyWriteBackLog()
{
//always make sure to have an extra entry at the end w/ -1 to avoid
//infinitive loops
for (int i=0;writeBackLogIdx[i]!=-1;i++) {
// always make sure to have an extra entry at the end w/ -1 to avoid
// infinitive loops
for (int i = 0; writeBackLogIdx[i] != -1; i++) {
dsp_op_write_reg(writeBackLogIdx[i], g_dsp.r[writeBackLogIdx[i]] | writeBackLog[i]);
// Clear back log
writeBackLogIdx[i] = -1;
@ -440,9 +444,13 @@ void applyWriteBackLog()
void zeroWriteBackLog()
{
//always make sure to have an extra entry at the end w/ -1 to avoid
//infinitive loops
for (int i=0;writeBackLogIdx[i]!=-1;i++)
// always make sure to have an extra entry at the end w/ -1 to avoid
// infinitive loops
// What does this actually do? It just writes zeroes to registers that are
// mentioned in the write back log, without checking that the indexes aren't -1.
// Doesn't really seem sane - shouldn't it check for -1, at least?
for (int i = 0; writeBackLogIdx[i] != -1; i++)
dsp_op_write_reg(writeBackLogIdx[i], 0);
}