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microVU: 

- Small Optimization...

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@1283 96395faa-99c1-11dd-bbfe-3dabce05a288
This commit is contained in:
cottonvibes 2009-05-29 04:18:09 +00:00
parent 12ca3898d6
commit 949c02ed45
1 changed files with 17 additions and 7 deletions
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24
pcsx2/x86/microVU_Flags.inl
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@ -184,23 +184,32 @@ microVUt(void) mVUsetupFlags(int* xStatus, int* xMac, int* xClip, int cycles) {
}
}
microVUt(void) mVUflagPass(int startPC) {
#define shortBranch() { \
if (branch == 3) { \
mVUflagPass<vuIndex>(aBranchAddr, (xCount - (mVUcount+1))); \
mVUcount = 4; \
} \
}
// Scan through instructions and check if flags are read (FSxxx, FMxxx, FCxxx opcodes)
microVUx(void) mVUflagPass(u32 startPC, u32 xCount) {
microVU* mVU = mVUx;
int oldPC = iPC;
int oldCount = mVUcount;
int oldBranch = mVUbranch;
int aBranchAddr;
iPC = startPC / 4;
mVUcount = 0;
mVUbranch = 0;
for (int branch = 0; mVUcount < 4; mVUcount++) {
for (int branch = 0; mVUcount < xCount; mVUcount++) {
incPC(1);
if ( curI & _Ebit_ ) { branch = 1; }
if ( curI & _MDTbit_ ) { branch = 4; }
if (!(curI & _Ibit_) ) { incPC(-1); mVUopL<vuIndex, 3>(); incPC(1); }
if (branch >= 2) { break; }
if (branch >= 2) { shortBranch(); break; }
else if (branch == 1) { branch = 2; }
if (mVUbranch) { branch = 3; mVUbranch = 0; }
if (mVUbranch) { branch = (mVUbranch >= 9) ? 5 : 3; aBranchAddr = branchAddr; mVUbranch = 0; }
incPC(1);
}
if (mVUcount < 4) { mVUflagInfo |= 0xfff; }
@ -214,17 +223,18 @@ microVUt(void) mVUflagPass(int startPC) {
#define branchType2 else if (mVUbranch >= 9) // JR/JALR
#define branchType3 else // Conditional Branch
// Checks if the first 4 instructions of a block will read flags
microVUt(void) mVUsetFlagInfo() {
microVU* mVU = mVUx;
branchType1 { incPC(-1); mVUflagPass<vuIndex>(branchAddr); incPC(1); }
branchType1 { incPC(-1); mVUflagPass<vuIndex>(branchAddr, 4); incPC(1); }
branchType2 { mVUflagInfo |= 0xfff; }
branchType3 {
incPC(-1);
mVUflagPass<vuIndex>(branchAddr);
mVUflagPass<vuIndex>(branchAddr, 4);
int backupFlagInfo = mVUflagInfo;
mVUflagInfo = 0;
incPC(4); // Branch Not Taken
mVUflagPass<vuIndex>(xPC);
mVUflagPass<vuIndex>(xPC, 4);
incPC(-3);
mVUflagInfo |= backupFlagInfo;
}