mirror of
https://github.com/GearsProgress/Poke_Transporter_GB.git
synced 2026-03-21 17:34:42 -05:00
34 lines
1.3 KiB
C++
34 lines
1.3 KiB
C++
// Originally created by Lorenzooone and modified with their permission
|
|
// Source: https://github.com/Lorenzooone/Pokemon-Gen3-to-Gen-X
|
|
|
|
#include "libraries/Pokemon-Gen3-to-Gen-X/include/base_include.h"
|
|
#include <stddef.h>
|
|
#include "libraries/Pokemon-Gen3-to-Gen-X/include/useful_qualifiers.h"
|
|
#include "libraries/Pokemon-Gen3-to-Gen-X/include/timing_basic.h"
|
|
#include "libraries/Pokemon-Gen3-to-Gen-X/include/delays.h"
|
|
|
|
#define NUM_CYCLES_PER_ITER 4
|
|
#define NUM_CYCLES_PER_ITER_CHECK 8
|
|
|
|
NO_INLINE IWRAM_CODE void delay_cycles(u32 num_cycles) {
|
|
num_cycles = (num_cycles + NUM_CYCLES_PER_ITER - 1 + (NUM_CYCLES_PER_ITER / 2)) / NUM_CYCLES_PER_ITER;
|
|
__asm__ volatile (
|
|
"L1%=: subs %[wait], #1;"
|
|
"bne L1%=;"
|
|
: [wait] "+l" (num_cycles)
|
|
);
|
|
}
|
|
|
|
NO_INLINE IWRAM_CODE void delay_cycles_until(u32 num_cycles, vu8* data, u8 wanted, u8 cycles_per_load) {
|
|
num_cycles = (num_cycles + (NUM_CYCLES_PER_ITER_CHECK + cycles_per_load) - 1 + ((NUM_CYCLES_PER_ITER_CHECK + cycles_per_load) / 2)) / (NUM_CYCLES_PER_ITER_CHECK + cycles_per_load);
|
|
__asm__ volatile (
|
|
"L1%=: ldrb r3, [%[data], #0];"
|
|
"cmp r3, %[wanted];"
|
|
"beq L2%=;"
|
|
"subs %[wait], #1;"
|
|
"bne L1%=;"
|
|
"L2%=:;"
|
|
: [wait] "+l" (num_cycles) : [data]"l"(data), [wanted]"l"(wanted) : "r3"
|
|
);
|
|
}
|