42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#ifndef timing_h
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#define timing_h
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#include "defs.h"
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#ifdef GB_INTERNAL
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void internal GB_advance_cycles(GB_gameboy_t *gb, uint8_t cycles);
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void internal GB_emulate_timer_glitch(GB_gameboy_t *gb, uint8_t old_tac, uint8_t new_tac);
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bool internal GB_timing_sync_turbo(GB_gameboy_t *gb); /* Returns true if should skip frame */
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void internal GB_timing_sync(GB_gameboy_t *gb);
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void internal GB_set_internal_div_counter(GB_gameboy_t *gb, uint16_t value);
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enum {
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GB_TIMA_RUNNING = 0,
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GB_TIMA_RELOADING = 1,
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GB_TIMA_RELOADED = 2
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};
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#define GB_SLEEP(gb, unit, state, cycles) do {\
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(gb)->unit##_cycles -= (cycles) * __state_machine_divisor; \
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if ((gb)->unit##_cycles <= 0) {\
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(gb)->unit##_state = state;\
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return;\
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unit##state:; \
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}\
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} while (0)
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#define GB_STATE_MACHINE(gb, unit, cycles, divisor) \
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static const int __state_machine_divisor = divisor;\
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(gb)->unit##_cycles += cycles; \
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if ((gb)->unit##_cycles <= 0) {\
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return;\
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}\
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switch ((gb)->unit##_state)
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#endif
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#define GB_STATE(gb, unit, state) case state: goto unit##state
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#define GB_UNIT(unit) int32_t unit##_cycles, unit##_state
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#endif /* timing_h */
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