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idle loops adjusted

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@549 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-07-15 17:04:43 +00:00
parent 1413b9a118
commit 5ed2a20eaa
5 changed files with 89 additions and 52 deletions
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4
cpu/fame/famec.c
View file

@ -5041,8 +5041,8 @@ idle_install:
INSTALL_IDLE(0x75f8, 0x67f8, idle_detector_bcc8, 0x6701_idle, 0x6701);
INSTALL_IDLE(0x75f6, 0x67f6, idle_detector_bcc8, 0x6701_idle, 0x6701);
INSTALL_IDLE(0x75f2, 0x67f2, idle_detector_bcc8, 0x6701_idle, 0x6701);
INSTALL_IDLE(0x7dfe, 0x60fe, idle_detector_dead, 0x6001_idle, 0x6001);
INSTALL_IDLE(0x7dfc, 0x60fc, idle_detector_dead, 0x6001_idle, 0x6001);
INSTALL_IDLE(0x7dfe, 0x60fe, idle_detector_bcc8, 0x6001_idle, 0x6001);
INSTALL_IDLE(0x7dfc, 0x60fc, idle_detector_bcc8, 0x6001_idle, 0x6001);
return 0;
idle_remove:

24
cpu/fame/famec_opcodes.h
View file

@ -40013,7 +40013,7 @@ RET(8)
extern int SekIsIdleCode(unsigned short *dst, int bytes);
extern int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop);
extern int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop, void *ctx);
OPCODE(idle_detector_bcc8)
{
@ -40032,18 +40032,22 @@ OPCODE(idle_detector_bcc8)
ret = SekIsIdleCode(dest_pc, bytes);
newop = (Opcode & 0xfe) | 0x7100;
if (!ret) newop |= 0x200;
if (Opcode & 0x0100) newop |= 0x400; // beq
if ( Opcode & 0x0100) newop |= 0x400; // beq
if (!(Opcode & 0x0f00)) newop |= 0xc00; // bra
ret = SekRegisterIdlePatch(GET_PC - 2, Opcode, newop);
ret = SekRegisterIdlePatch(GET_PC - 2, Opcode, newop, &m68kcontext);
switch (ret)
{
case 0: PC[-1] = newop; break;
case 1: break;
case 2: JumpTable[Opcode] = (Opcode & 0x0100) ? CAST_OP(0x6701) : CAST_OP(0x6601); break;
case 2: JumpTable[Opcode] = (Opcode & 0x0f00) ?
((Opcode & 0x0100) ? CAST_OP(0x6701) : CAST_OP(0x6601)) :
CAST_OP(0x6001); break;
}
end:
cond_true = (Opcode & 0x0100) ? !flag_NotZ : flag_NotZ; // beq?
if ((Opcode & 0xff00) == 0x6000) cond_true = 1;
else cond_true = (Opcode & 0x0100) ? !flag_NotZ : flag_NotZ; // beq?
if (cond_true)
{
PC = dest_pc;
@ -40052,14 +40056,4 @@ end:
RET(8)
}
OPCODE(idle_detector_dead)
{
// patch without further questions
int newop = 0x7d00 | (Opcode & 0xff);
PC[-1] = newop;
SekRegisterIdlePatch(GET_PC - 2, Opcode, newop);
PC += ((s8)(Opcode & 0xFE)) >> 1;
RET(10)
}
#endif // PICODRIVE_HACK