profi200

PSC fill with total size of 3 MiB:
Single fill:                              3603684130 byte/s, 3436 MiB/s.
2 fills in VRAM bank 0:                   3799706967 byte/s, 3623 MiB/s.
2 fills (one for each VRAM bank):         7174738159 byte/s, 6842 MiB/s.

PPF texture copy:
Bank 0 to upper half of bank 0 (1.5 MiB): 1850370283 byte/s, 1764 MiB/s.
Bank 0 to bank 1 (3 MiB):                 2977645889 byte/s, 2839 MiB/s.

profi200

@ License: Do whatever you want.

.syntax unified
.cpu arm7tdmi
.fpu softvfp



@ Based on https://web.archive.org/web/20240111232601/https://gist.github.com/merryhime/797c523724e2dc02ada86a1cfadea3ee
@ Thanks to merryhime for discovering this trick.

profi200

static u8 crc7(const u8 *data, u32 len)
{
	u32 crc = 0; // u32 to avoid "and rX, rX, #0xFF" in the bit loop.
	while(len--)
	{
		crc ^= *data++;
		for(u32 i = 0; i < 8; i++)
		{
			if(crc & 0x80u) crc ^= 0x89u;
			crc <<= 1;

profi200

// License: Do what you want. I don't care.

#include <algorithm>
#include <math.h>
#include <cstdio>
#include <cinttypes>
#include "lodepng.h"


typedef uint8_t  u8;

profi200

.cpu arm7tdmi
.fpu softvfp


.macro BEGIN_ASM_FUNC name, type=arm, linkage=global, section=text
	.section        .\section\().\name, "ax", %progbits
.if \type == thumb
	.align          1
	.thumb
.else

profi200

#include <string.h>
#include "mem_map.h"
#include "types.h"
#include "util.h"
#include "arm9/hardware/gamecard.h"
#include "arm9/ncch.h"
#include "arm9/hardware/crypto.h"
#include "arm9/hardware/timer.h"

profi200

#include <stdio.h>
#include <3ds.h>


#define REVERSE_INTERVAL  (60u * 15)



static void setLcdFill(const u32 val)
{

profi200

3 MiB:
	vector: 15926306
	struct: 16319471

1 KiB:
	vector: 5597
	struct: 5758

128 bytes:
	vector: 1057/1085

profi200

@ u32 pcTest(void)
@ Expected result is pc + 8 but it's pc + 10 on ARM7.
BEGIN_ASM_FUNC pcTest
	ldr pc, =pcTest_mov + 2
pcTest_mov:
	mov r0, pc
	bx lr
END_ASM_FUNC

profi200

#include <inttypes.h>
#include <gba_console.h>
#include <gba_video.h>
#include <gba_interrupt.h>
#include <gba_systemcalls.h>
#include <gba_input.h>
#include <gba_sound.h>
#include <gba_timers.h>
#include <stdio.h>
#include <stdlib.h>