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DSPLLE: jit increment/decrement_addr_reg to match int (TODO: increase/decrease). 

revert the OR back to MOV, since it never happens (according to nakee)

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5737 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
j4ck.fr0st 2010-06-18 15:41:30 +00:00
parent 1d1af913a8
commit 866859493a
2 changed files with 34 additions and 14 deletions
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9
Source/Core/DSPCore/Src/Jit/DSPJitExtOps.cpp
View File

@ -531,8 +531,15 @@ void DSPEmitter::pushExtValueFromMem(u16 dreg, u16 sreg) {
}
void DSPEmitter::popExtValueToReg() {
// in practise, we rarely ever have a non-NX main op
// with an extended op, so the OR here is either
// not run (storeIndex == -1) or ends up OR'ing
// EBX with 0 (becoming the MOV we have here)
// nakee wants to keep it clean, so lets do that.
// [nakeee] the or case never happens in real
// [nakeee] it's just how the hardware works so we added it
if (storeIndex != -1)
OR(16, M(&g_dsp.r[storeIndex]), R(EBX));
MOV(16, M(&g_dsp.r[storeIndex]), R(EBX));
storeIndex = -1;
// TODO handle commands such as 'l

37
Source/Core/DSPCore/Src/Jit/DSPJitUtil.cpp
View File

@ -63,8 +63,8 @@ void DSPEmitter::increment_addr_reg(int reg)
CMP(16, R(ESI), R(EDI));
FixupBranch not_equal = J_CC(CC_NE);
// tmp ^= wr_reg
XOR(16, R(EAX), R(EDX));
// tmp -= wr_reg
SUB(16, R(EAX), R(EDX));
FixupBranch end = J();
SetJumpTarget(not_equal);
@ -77,27 +77,40 @@ void DSPEmitter::increment_addr_reg(int reg)
MOV(16, M(&g_dsp.r[reg]), R(EAX));
}
// See http://code.google.com/p/dolphin-emu/source/detail?r=3125
// EAX = g_dsp.r[reg]
// EDX = g_dsp.r[DSP_REG_WR0 + reg]
void DSPEmitter::decrement_addr_reg(int reg)
{
// s16 tmp = g_dsp.r[reg];
// s16 ar = g_dsp.r[reg];
MOV(16, R(EAX), M(&g_dsp.r[reg]));
MOV(16, R(EDX), M(&g_dsp.r[DSP_REG_WR0 + reg]));
// if ((tmp & g_dsp.r[DSP_REG_WR0 + reg]) == 0)
TEST(16, R(EAX), R(EDX));
FixupBranch not_equal = J_CC(CC_NZ);
// ToMask(WR0), calculating it into EDI
MOV(16, R(EDI), R(EDX));
ToMask(EDI);
// tmp |= g_dsp.r[DSP_REG_WR0 + reg];
OR(16, R(EAX), R(EDX));
//compute min from EDI and EAX
// min = (tmb+1-ar)&tmb;
LEA(16, ESI, MDisp(EDI, 1));
SUB(16, R(ESI), R(EAX));
AND(16, R(ESI), R(EDI));
FixupBranch end = J();
SetJumpTarget(not_equal);
// tmp--;
// wr < min
CMP(16, R(EDX), R(ESI));
FixupBranch wr_lt_min = J_CC(CC_B);
// !min
TEST(16, R(ESI), R(ESI));
FixupBranch min_zero = J_CC(CC_Z);
// ar--;
SUB(16, R(EAX), Imm16(1));
FixupBranch end = J();
// ar += wr;
SetJumpTarget(wr_lt_min);
SetJumpTarget(min_zero);
ADD(16, R(EAX), R(EDX));
SetJumpTarget(end);