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#ifndef AHOY_C8ASM_PARSER_H
#define AHOY_C8ASM_PARSER_H
#include <stddef.h>
#include <stdint.h>
#include <mbstring.h>
struct tokens;
typedef enum {
I_ADD_I_VX,
I_ADD_VX_B,
I_ADD_VX_VY,
I_AND,
I_BCD,
I_CALL,
I_CLS,
I_DB,
I_DRW,
I_HEX,
I_JP_A,
I_JP_V0_A,
I_LD_DT,
I_LD_I,
I_LD_ST,
I_LD_VX_B,
I_LD_VX_DT,
I_LD_VX_K,
I_LD_VX_VY,
I_OR,
I_RET,
I_RND,
I_RSTR,
I_SE_VX_B,
I_SE_VX_VY,
I_SHL,
I_SHR,
I_SKNP,
I_SKP,
I_SNE_VX_B,
I_SNE_VX_VY,
I_STOR,
I_SUB,
I_SUBN,
I_SYS,
I_XOR,
} instrkind;
typedef enum {
R_V0,
R_V1,
R_V2,
R_V3,
R_V4,
R_V5,
R_V6,
R_V7,
R_V8,
R_V9,
R_VA,
R_VB,
R_VC,
R_VD,
R_VE,
R_VF,
R_I,
R_K,
R_DT,
R_ST,
} reg;
typedef enum {
D_INSTR,
D_LABEL,
} dirkind;
/* Arguments can always be represented by a uint16_t, however the parser is not
responsible for assigning addresses to labels. As a result an arg at this
stage can be either a uint16_t or the name of a label. */
struct raw_addr {
bool label;
union {
uint16_t val;
struct u8view sv;
};
};
struct instr {
instrkind kind;
/* The most arguments any instruction can take is 3, so it’s more efficient
to just store the arguments in a fixed-size array. The only exception is
the ‘db’ instruction which takes a variable-number of arguments, so in
that case we use a dynamic array. */
union {
struct raw_addr args[3];
struct {
uint8_t *buf;
size_t cap;
};
};
size_t len;
};
struct dir {
dirkind kind;
union {
struct u8view name;
struct instr instr;
};
};
struct ast {
struct dir *buf;
size_t len, cap;
};
struct ast parsefile(struct tokens);
#endif /* !AHOY_C8ASM_PARSER_H */
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