2022-02-02 12:49:45 -08:00
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#ifndef LAYLA_H
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#define LAYLA_H
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#include <stdint.h>
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2022-02-12 10:52:11 -08:00
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#define L_PACK_STRUCT __attribute__((packed))
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2022-02-02 12:49:45 -08:00
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#define ll_swap(X, Y) X ^= Y ^= X ^= Y
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typedef struct {
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uint8_t C : 1;
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uint8_t Z : 1;
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uint8_t I : 1;
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uint8_t D : 1;
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uint8_t XB : 1;
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uint8_t M : 1;
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uint8_t V : 1;
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uint8_t N : 1;
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2022-02-12 10:52:11 -08:00
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} L_PACK_STRUCT ll_status_internal;
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2022-02-02 12:49:45 -08:00
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typedef union {
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uint8_t byte;
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ll_status_internal f;
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} ll_status;
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typedef struct {
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uint8_t L;
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uint8_t H;
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} ll_reg_HL;
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typedef union {
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uint16_t F;
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ll_reg_HL D;
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} ll_reg;
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typedef struct {
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// bools? whats that, a bowl spoon?
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uint8_t e : 1;
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uint8_t DB;
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uint8_t PB;
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ll_status P;
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ll_reg A;
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ll_reg X;
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ll_reg Y;
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ll_reg D;
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ll_reg SP;
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ll_reg PC;
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void* data;
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} ll_cpu;
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typedef uint16_t(*ll_opcode)(ll_cpu*);
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#define ll_setnz16(DEST) \
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c->P.f.N = c->DEST.F >> 15; \
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c->P.f.Z = (c->DEST.F == 0)
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#define ll_setnz8(DEST) \
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c->P.f.N = c->DEST.D.L >> 7; \
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c->P.f.Z = (c->DEST.D.L == 0)
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#define ll_trans(SRC, DEST) \
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if(c->P.f.XB) { \
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c->DEST.D.L = c->SRC.D.L; \
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ll_setnz8(DEST); \
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} else { \
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c->DEST.F = c->SRC.F; \
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ll_setnz16(DEST); \
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}
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#endif
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