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More Map->Array replacements and code simplifications.

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This commit is contained in:
Maxim Poliakovski 2019-07-29 20:51:10 +02:00
parent 61370019ef
commit a6335fe704
2 changed files with 11 additions and 21 deletions
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7
ppcemumain.h
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@ -624,13 +624,6 @@ extern void ppc_main_opcode();
table, partially due to instructions that use either 6 or 11 bits table, partially due to instructions that use either 6 or 11 bits
for the instruction. for the instruction.
**/ **/
static std::map<uint8_t, PPCOpcode> SubOpcode16Grabber=
{{0, &ppc_bc}, {1, &ppc_bcl}, {2, &ppc_bca}, {3, &ppc_bcla}
};
static std::map<uint8_t, PPCOpcode> SubOpcode18Grabber=
{{0, &ppc_b}, {1, &ppc_bl}, {2, &ppc_ba}, {3, &ppc_bla}
};
static std::map<uint16_t, PPCOpcode> SubOpcode19Grabber= static std::map<uint16_t, PPCOpcode> SubOpcode19Grabber=
{{32, &ppc_bclr}, {33, &ppc_bclrl}, {66, &ppc_crnor}, {100, &ppc_rfi}, {{32, &ppc_bclr}, {33, &ppc_bclrl}, {66, &ppc_crnor}, {100, &ppc_rfi},

25
ppcopcodes.cpp
View File

@ -77,6 +77,15 @@ static PPCOpcode OpcodeGrabber[] = {
ppc_psq_st, ppc_psq_stu, ppc_illegalop, ppc_opcode63 ppc_psq_st, ppc_psq_stu, ppc_illegalop, ppc_opcode63
}; };
/** Lookup tables for branch instructions. */
static PPCOpcode SubOpcode16Grabber[] = {
ppc_bc, ppc_bcl, ppc_bca, ppc_bcla
};
static PPCOpcode SubOpcode18Grabber[] = {
ppc_b, ppc_bl, ppc_ba, ppc_bla
};
/** /**
Extract the registers desired and the values of the registers Extract the registers desired and the values of the registers
This also takes the MSR into account, mainly to determine This also takes the MSR into account, mainly to determine
@ -243,23 +252,11 @@ void ppc_opcode4(){
} }
void ppc_opcode16(){ void ppc_opcode16(){
uint8_t subop_grab = ppc_cur_instruction & 3; SubOpcode16Grabber[ppc_cur_instruction & 3]();
#ifdef EXHAUSTIVE_DEBUG
uint32_t regrab = (uint32_t)subop_grab;
printf("Executing Opcode 16 table subopcode entry %d \n", regrab);
SubOpcode16Grabber[subop_grab]();
#else
SubOpcode16Grabber[subop_grab]();
#endif // EXHAUSTIVE_DEBUG
} }
void ppc_opcode18(){ void ppc_opcode18(){
uint8_t subop_grab = ppc_cur_instruction & 3; SubOpcode18Grabber[ppc_cur_instruction & 3]();
//printf("Reading from Opcode 18 table \n");
//uint32_t regrab = (uint32_t)subop_grab;
//printf("Executing subopcode entry %d \n", regrab);
SubOpcode18Grabber[subop_grab]();
} }
void ppc_opcode19(){ void ppc_opcode19(){