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typedef enum
{
C8_ILL,
/* Onnn = 0,1,2,A,B */
/* 00E0 - CLS */ C8_CLS,
/* 00EE - RET */ C8_RET,
/* 0nnn - SYS addr */ C8_SYS,
/* 1nnn - JP addr */ C8_JP,
/* 2nnn - CALL addr */ C8_CALL,
/* Annn - LD I, addr */ C8_LDI,
/* Bnnn - JP V0, addr */ C8_JPV,
/* Oxkk = 3,4,6,7,C,E,F */
/* 3xkk - SE Vx, byte */ C8_SEB,
/* 4xkk - SNE Vx, byte */ C8_SNEB,
/* 6xkk - LD Vx, byte */ C8_LD,
/* 7xkk - ADD Vx, byte */ C8_ADDB,
/* Cxkk - RND Vx, byte */ C8_RND,
/* Ex9E - SKP Vx */ C8_SKP,
/* ExA1 - SKNP Vx */ C8_SKNP,
/* Fx07 - LD Vx, DT */ C8_MVDT,
/* Fx0A - LD Vx, K */ C8_LDK,
/* Fx15 - LD DT, Vx */ C8_LDDT,
/* Fx18 - LD ST, Vx */ C8_LDST,
/* Fx1E - ADD I, Vx */ C8_ADDI,
/* Fx29 - LD F, Vx */ C8_HEX,
/* Fx33 - LD B, Vx */ C8_BCD,
/* Fx55 - LD [I], Vx */ C8_SAVE,
/* Fx65 - LD Vx, [I] */ C8_RESTORE,
/* Oxyn = 5,8,9,D */
/* 5xy0 - SE Vx, Vy */ C8_SE,
/* 8xy0 - LD Vx, Vy */ C8_MOVE,
/* 8xy1 - OR Vx, Vy */ C8_OR,
/* 8xy2 - AND Vx, Vy */ C8_AND,
/* 8xy3 - XOR Vx, Vy */ C8_XOR,
/* 8xy4 - ADD Vx, Vy */ C8_ADD,
/* 8xy5 - SUB Vx, Vy */ C8_SUB,
/* 8xy6 - SHR Vx {, Vy} */ C8_SHR,
/* 8xy7 - SUBN Vx, Vy */ C8_SUBN,
/* 8xyE - SHL Vx {, Vy} */ C8_SHL,
/* 9xy0 - SNE Vx, Vy */ C8_SNE,
/* Dxyn - DRW Vx, Vy, nibble */ C8_DRW,
C8_OP_CNT
} chip8_op;
#define c8_decode_generate(name) \
void c8_##name(u8* code, u16 offset, void* usrdat) \
{ \
u16 word, instr, nnn; \
u8 o, x, y, n, kk; \
\
(void)usrdat; \
\
word = *(u16*)(code + offset); \
instr = be16toh(word); \
o = (instr & 0xF000) >> 12; \
nnn = (instr & 0x0FFF); \
x = (instr & 0x0F00) >> 8; \
y = (instr & 0x00F0) >> 4; \
n = (instr & 0x000F); \
kk = (instr & 0x00FF); \
\
if(o == 0 && nnn == 0x0E0) X_C8_CLS; \
else if(o == 0 && nnn == 0x0EE) X_C8_RET; \
else if(o == 0) X_C8_SYS; \
else if(o == 1) X_C8_JP; \
else if(o == 2) X_C8_CALL; \
else if(o == 0xA) X_C8_LDI; \
else if(o == 0xB) X_C8_JPV; \
else if(o == 3) X_C8_SEB; \
else if(o == 4) X_C8_SNEB; \
else if(o == 6) X_C8_LD; \
else if(o == 7) X_C8_ADDB; \
else if(o == 0xC) X_C8_RND; \
else if(o == 0xE && kk == 0x9E) X_C8_SKP; \
else if(o == 0xE && kk == 0xA1) X_C8_SKNP; \
else if(o == 0xF && kk == 0x07) X_C8_MVDT; \
else if(o == 0xF && kk == 0x0A) X_C8_LDK; \
else if(o == 0xF && kk == 0x15) X_C8_LDDT; \
else if(o == 0xF && kk == 0x18) X_C8_LDST; \
else if(o == 0xF && kk == 0x1E) X_C8_ADDI; \
else if(o == 0xF && kk == 0x29) X_C8_HEX; \
else if(o == 0xF && kk == 0x33) X_C8_BCD; \
else if(o == 0xF && kk == 0x55) X_C8_SAVE; \
else if(o == 0xF && kk == 0x65) X_C8_RESTORE; \
else if(o == 5 && n == 0) X_C8_SE; \
else if(o == 8 && n == 0) X_C8_MOVE; \
else if(o == 8 && n == 1) X_C8_OR; \
else if(o == 8 && n == 2) X_C8_AND; \
else if(o == 8 && n == 3) X_C8_XOR; \
else if(o == 8 && n == 4) X_C8_ADD; \
else if(o == 8 && n == 5) X_C8_SUB; \
else if(o == 8 && n == 6) X_C8_SHR; \
else if(o == 8 && n == 7) X_C8_SUBN; \
else if(o == 8 && n == 0xE) X_C8_SHL; \
else if(o == 9 && n == 0) X_C8_SNE; \
else if(o == 0xD) X_C8_DRW; \
else X_C8_ILL; \
}
#include "meta/disasm.c"
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