mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-10-04 19:01:44 +02:00
78d49d3873
byuu says: Changelog: - int_t<bits> replaced with Integer<bits> - uint_t<bits> replaced with Natural<bits> - fixed "Synchronize Audio" menu option that broke recently - all of sfc/performance ported to "auto function() -> return;" syntax With this WIP, all of higan is finally ported over to the new function declaration syntax. Thank the gods. There's still going to be periodic disruption for diffs from porting over signed->int, unsigned->uint, and whatever we come up with for the new Natural<> and Integer<> classes. But the worst of it's behind us now.
105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
auto SMP::tick() -> void {
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timer0.tick();
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timer1.tick();
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timer2.tick();
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clock += cycle_step_cpu;
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dsp.clock -= 24;
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synchronizeDSP();
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}
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auto SMP::op_io() -> void {
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#if defined(CYCLE_ACCURATE)
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tick();
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#endif
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}
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auto SMP::op_read(uint16 addr) -> uint8 {
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#if defined(CYCLE_ACCURATE)
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tick();
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#endif
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if((addr & 0xfff0) == 0x00f0) return mmio_read(addr);
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if(addr >= 0xffc0 && status.iplrom_enable) return iplrom[addr & 0x3f];
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return apuram[addr];
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}
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auto SMP::op_write(uint16 addr, uint8 data) -> void {
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#if defined(CYCLE_ACCURATE)
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tick();
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#endif
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if((addr & 0xfff0) == 0x00f0) mmio_write(addr, data);
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apuram[addr] = data; //all writes go to RAM, even MMIO writes
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}
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auto SMP::op_step() -> void {
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#define op_readpc() op_read(regs.pc++)
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#define op_readdp(addr) op_read((regs.p.p << 8) + addr)
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#define op_writedp(addr, data) op_write((regs.p.p << 8) + addr, data)
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#define op_readaddr(addr) op_read(addr)
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#define op_writeaddr(addr, data) op_write(addr, data)
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#define op_readstack() op_read(0x0100 | ++regs.sp)
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#define op_writestack(data) op_write(0x0100 | regs.sp--, data)
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#if defined(CYCLE_ACCURATE)
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if(opcode_cycle == 0) {
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opcode_number = op_readpc();
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opcode_cycle++;
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} else switch(opcode_number) {
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#include "core/opcycle_misc.cpp"
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#include "core/opcycle_mov.cpp"
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#include "core/opcycle_pc.cpp"
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#include "core/opcycle_read.cpp"
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#include "core/opcycle_rmw.cpp"
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}
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#else
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uint opcode = op_readpc();
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switch(opcode) {
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#include "core/op_misc.cpp"
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#include "core/op_mov.cpp"
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#include "core/op_pc.cpp"
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#include "core/op_read.cpp"
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#include "core/op_rmw.cpp"
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}
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//TODO: untaken branches should consume less cycles
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timer0.tick(cycle_count_table[opcode]);
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timer1.tick(cycle_count_table[opcode]);
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timer2.tick(cycle_count_table[opcode]);
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clock += cycle_table_cpu[opcode];
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dsp.clock -= cycle_table_dsp[opcode];
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synchronize_dsp();
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#endif
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}
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const uint SMP::cycle_count_table[256] = {
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#define c 12
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//0 1 2 3 4 5 6 7 8 9 A B C D E F
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2,8,4,7, 3,4,3,6, 2,6,5,4, 5,4,6,8, //0
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4,8,4,7, 4,5,5,6, 5,5,6,5, 2,2,4,6, //1
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2,8,4,7, 3,4,3,6, 2,6,5,4, 5,4,7,4, //2
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4,8,4,7, 4,5,5,6, 5,5,6,5, 2,2,3,8, //3
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2,8,4,7, 3,4,3,6, 2,6,4,4, 5,4,6,6, //4
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4,8,4,7, 4,5,5,6, 5,5,4,5, 2,2,4,3, //5
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2,8,4,7, 3,4,3,6, 2,6,4,4, 5,4,7,5, //6
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4,8,4,7, 4,5,5,6, 5,5,5,5, 2,2,3,6, //7
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2,8,4,7, 3,4,3,6, 2,6,5,4, 5,2,4,5, //8
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4,8,4,7, 4,5,5,6, 5,5,5,5, 2,2,c,5, //9
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3,8,4,7, 3,4,3,6, 2,6,4,4, 5,2,4,4, //A
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4,8,4,7, 4,5,5,6, 5,5,5,5, 2,2,3,4, //B
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3,8,4,7, 4,5,4,7, 2,5,6,4, 5,2,4,9, //C
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4,8,4,7, 5,6,6,7, 4,5,5,5, 2,2,8,3, //D
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2,8,4,7, 3,4,3,6, 2,4,5,3, 4,3,4,1, //E
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4,8,4,7, 4,5,5,6, 3,4,5,4, 2,2,6,1, //F
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#undef c
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};
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