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https://github.com/SonoSooS/PicoGB.git
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d5384657f5
The mapper never changes during run, so why always recalculate it? This change also makes for future flexibility.
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
#pragma once
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#include "types.h"
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#include "mi.h"
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#define MB_FMC_MODE_NONE 0
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#define MB_FMC_MODE_ADD_r16 1
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#define MB_FMC_MODE_SUB_r8 2
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#define MB_FMC_MODE_ADD_r8 3
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//#define MB_FMC_MODE_NONE_4 4
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#define MB_FMC_MODE_ADD_r16_r8 5
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#define MB_FMC_MODE_ADC_r8 6
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#define MB_FMC_MODE_SBC_r8 7
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#define MB_FMC_MODE_MAX 4
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#define MB_FLAG_Z 0x80
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#define MB_FLAG_N 0x40
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#define MB_FLAG_H 0x20
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#define MB_FLAG_C 0x10
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#define MB_FLAG_BITS 0xF0
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#define MB_CC_NZ 0
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#define MB_CC_Z 1
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#define MB_CC_NC 2
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#define MB_CC_C 3
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// Nothing cares about exec, works same as read
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#define MB_TYPE_READ 0
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#define MB_TYPE_WRITE 1
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#define MB_TYPE_IS_READ(type) (!(type))
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#define MB_TYPE_IS_WRITE(type) (!!(type))
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#define MB_DATA_DONTCARE 0
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#define MB_DATA_DEFAULT 0xFF
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struct mb_state
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{
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union
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{
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struct
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{
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r8 C, B, E, D, L, H, A, F; // A is this way because it's easier and faster (PUSH AF is rare)
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};
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struct
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{
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r16 BC, DE, HL, FA;
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};
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r8 raw8[8];
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r16 raw16[4];
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hilow16_t hilo16[4];
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} reg;
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hilow16_t IR;
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hilow16_t IMM;
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r16 PC;
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r16 SP;
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r8 IF;
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r8 IE;
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r8 IME;
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r8 IME_ASK;
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var DIV;
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var HALTING;
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r16 FR1;
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r16 FR2;
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var FMC_MODE;
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struct mi_dispatch* mi;
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struct mb_mi_cache micache;
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};
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typedef struct mb_state mb_state;
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word mb_exec(mb_state* __restrict);
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void mb_disasm(const mb_state* __restrict);
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void micache_invalidate(struct mb_mi_cache* __restrict mic);
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void micache_invalidate_range(struct mb_mi_cache* __restrict mic, word start, word end);
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PGB_FUNC static inline word mbh_irq_get_pending(const mb_state* __restrict mb)
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{
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return mb->IE & mb->IF;
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}
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