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https://github.com/bsnes-emu/bsnes.git
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83f684c66c
byuu says: Note: for Windows users, please go to nall/intrinsics.hpp line 60 and correct the typo from "DISPLAY_WINDOW" to "DISPLAY_WINDOWS" before compiling, otherwise things won't work at all. This will be a really major WIP for the core SNES emulation, so please test as thoroughly as possible. I rewrote the 65816 CPU core's dispatcher from a jump table to a switch table. This was so that I could pass class variables as parameters to opcodes without crazy theatrics. With that, I killed the regs.r[N] stuff, the flag_t operator|=, &=, ^= stuff, and all of the template versions of opcodes. I also removed some stupid pointless flag tests in xcn and pflag that would always be true. I sure hope that AWJ is happy with this; because this change was so that my flag assignments and branch tests won't need to build regs.P into a full 8-bit variable anymore. It does of course incur a slight performance hit when you pass in variables by-value to functions, but it should help with binary size (and thus cache) by reducing a lot of extra functions. (I know I could have used template parameters for some things even with a switch table, but chose not to for the aforementioned reasons.) Overall, it's about a ~1% speedup from the previous build. The CPU core instructions were never a bottleneck, but I did want to fix the P flag building stuff because that really was a dumb mistake v_v'
31 lines
913 B
C++
31 lines
913 B
C++
enum : unsigned {
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OPTYPE_DP = 0, //dp
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OPTYPE_DPX, //dp,x
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OPTYPE_DPY, //dp,y
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OPTYPE_IDP, //(dp)
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OPTYPE_IDPX, //(dp,x)
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OPTYPE_IDPY, //(dp),y
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OPTYPE_ILDP, //[dp]
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OPTYPE_ILDPY, //[dp],y
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OPTYPE_ADDR, //addr
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OPTYPE_ADDRX, //addr,x
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OPTYPE_ADDRY, //addr,y
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OPTYPE_IADDRX, //(addr,x)
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OPTYPE_ILADDR, //[addr]
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OPTYPE_LONG, //long
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OPTYPE_LONGX, //long, x
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OPTYPE_SR, //sr,s
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OPTYPE_ISRY, //(sr,s),y
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OPTYPE_ADDR_PC, //pbr:addr
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OPTYPE_IADDR_PC, //pbr:(addr)
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OPTYPE_RELB, //relb
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OPTYPE_RELW, //relw
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};
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auto disassemble_opcode(char* output) -> void;
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auto disassemble_opcode(char* output, uint32 addr, bool e, bool m, bool x) -> void;
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auto dreadb(uint32 addr) -> uint8;
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auto dreadw(uint32 addr) -> uint16;
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auto dreadl(uint32 addr) -> uint32;
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auto decode(uint8 offset_type, uint32 addr) -> uint32;
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