mirror of https://github.com/mlaux/gb6.git
speedup on 68k by eliminating indirect calls
This commit is contained in:
parent
4cde94d284
commit
2b6a315b0e
|
@ -30,7 +30,8 @@ int emulator_main(int argc, char *argv[])
|
||||||
// test the cpu, rom, and dmg independently and use the cpu
|
// test the cpu, rom, and dmg independently and use the cpu
|
||||||
// for other non-GB stuff
|
// for other non-GB stuff
|
||||||
dmg_new(&dmg, &cpu, &rom, &lcd);
|
dmg_new(&dmg, &cpu, &rom, &lcd);
|
||||||
cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
|
cpu.dmg = &dmg;
|
||||||
|
// cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
|
||||||
|
|
||||||
cpu.pc = 0x100;
|
cpu.pc = 0x100;
|
||||||
|
|
||||||
|
|
|
@ -156,7 +156,8 @@ int main(int argc, char *argv[])
|
||||||
// test the cpu, rom, and dmg independently and use the cpu
|
// test the cpu, rom, and dmg independently and use the cpu
|
||||||
// for other non-GB stuff
|
// for other non-GB stuff
|
||||||
dmg_new(&dmg, &cpu, &rom, &lcd);
|
dmg_new(&dmg, &cpu, &rom, &lcd);
|
||||||
cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
|
cpu.dmg = &dmg;
|
||||||
|
// cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
|
||||||
|
|
||||||
cpu.pc = 0x100;
|
cpu.pc = 0x100;
|
||||||
|
|
||||||
|
|
26
src/cpu.c
26
src/cpu.c
|
@ -2,20 +2,10 @@
|
||||||
#include <stdlib.h>
|
#include <stdlib.h>
|
||||||
|
|
||||||
#include "cpu.h"
|
#include "cpu.h"
|
||||||
|
#include "dmg.h"
|
||||||
#include "types.h"
|
#include "types.h"
|
||||||
#include "instructions.h"
|
#include "instructions.h"
|
||||||
|
|
||||||
void cpu_bind_mem_model(
|
|
||||||
struct cpu *cpu,
|
|
||||||
void *mem_model,
|
|
||||||
u8 (*mem_read)(void *, u16),
|
|
||||||
void (*mem_write)(void *, u16, u8)
|
|
||||||
) {
|
|
||||||
cpu->mem_model = mem_model;
|
|
||||||
cpu->mem_read = mem_read;
|
|
||||||
cpu->mem_write = mem_write;
|
|
||||||
}
|
|
||||||
|
|
||||||
int flag_isset(struct cpu *cpu, int flag)
|
int flag_isset(struct cpu *cpu, int flag)
|
||||||
{
|
{
|
||||||
return (cpu->f & flag) != 0;
|
return (cpu->f & flag) != 0;
|
||||||
|
@ -66,7 +56,7 @@ void cpu_panic(struct cpu *cpu)
|
||||||
|
|
||||||
static inline u8 read8(struct cpu *cpu, u16 address)
|
static inline u8 read8(struct cpu *cpu, u16 address)
|
||||||
{
|
{
|
||||||
return cpu->mem_read(cpu->mem_model, address);
|
return dmg_read(cpu->dmg, address);
|
||||||
}
|
}
|
||||||
|
|
||||||
static inline u16 read16(struct cpu *cpu, u16 address)
|
static inline u16 read16(struct cpu *cpu, u16 address)
|
||||||
|
@ -78,12 +68,12 @@ static inline u16 read16(struct cpu *cpu, u16 address)
|
||||||
|
|
||||||
static inline void write8(struct cpu *cpu, u16 address, u8 data)
|
static inline void write8(struct cpu *cpu, u16 address, u8 data)
|
||||||
{
|
{
|
||||||
cpu->mem_write(cpu->mem_model, address, data);
|
dmg_write(cpu->dmg, address, data);
|
||||||
}
|
}
|
||||||
|
|
||||||
static inline void write16(struct cpu *cpu, u16 address, u16 data)
|
static inline void write16(struct cpu *cpu, u16 address, u16 data)
|
||||||
{
|
{
|
||||||
cpu->mem_write(cpu->mem_model, address, data);
|
dmg_write(cpu->dmg, address, data);
|
||||||
}
|
}
|
||||||
|
|
||||||
static void inc_with_carry(struct cpu *regs, u8 *reg)
|
static void inc_with_carry(struct cpu *regs, u8 *reg)
|
||||||
|
@ -493,15 +483,15 @@ static u16 check_interrupts(struct cpu *cpu)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
u16 enabled = cpu->mem_read(cpu->mem_model, 0xffff);
|
u16 enabled = dmg_read(cpu->dmg, 0xffff);
|
||||||
u16 requested = cpu->mem_read(cpu->mem_model, 0xff0f);
|
u16 requested = dmg_read(cpu->dmg, 0xff0f);
|
||||||
|
|
||||||
for (k = 0; k < NUM_INTERRUPTS; k++) {
|
for (k = 0; k < NUM_INTERRUPTS; k++) {
|
||||||
int check = 1 << k;
|
int check = 1 << k;
|
||||||
if ((enabled & check) && (requested & check)) {
|
if ((enabled & check) && (requested & check)) {
|
||||||
// clear request flag for this interrupt and disable all further
|
// clear request flag for this interrupt and disable all further
|
||||||
// interrupts until service routine executes EI or RETI
|
// interrupts until service routine executes EI or RETI
|
||||||
cpu->mem_write(cpu->mem_model, 0xff0f, requested & ~check);
|
dmg_write(cpu->dmg, 0xff0f, requested & ~check);
|
||||||
cpu->interrupt_enable = 0;
|
cpu->interrupt_enable = 0;
|
||||||
return handlers[k];
|
return handlers[k];
|
||||||
}
|
}
|
||||||
|
@ -522,7 +512,7 @@ void cpu_step(struct cpu *cpu)
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
u8 opc = cpu->mem_read(cpu->mem_model, cpu->pc);
|
u8 opc = dmg_read(cpu->dmg, cpu->pc);
|
||||||
#ifdef GB6_DEBUG
|
#ifdef GB6_DEBUG
|
||||||
printf("0x%04x %s\n", cpu->pc, instructions[opc].format);
|
printf("0x%04x %s\n", cpu->pc, instructions[opc].format);
|
||||||
#endif
|
#endif
|
||||||
|
|
21
src/cpu.h
21
src/cpu.h
|
@ -3,6 +3,8 @@
|
||||||
|
|
||||||
#include "types.h"
|
#include "types.h"
|
||||||
|
|
||||||
|
struct dmg;
|
||||||
|
|
||||||
struct cpu
|
struct cpu
|
||||||
{
|
{
|
||||||
u8 a;
|
u8 a;
|
||||||
|
@ -18,17 +20,18 @@ struct cpu
|
||||||
u32 cycle_count;
|
u32 cycle_count;
|
||||||
u8 interrupt_enable;
|
u8 interrupt_enable;
|
||||||
|
|
||||||
u8 (*mem_read)(void *, u16);
|
struct dmg *dmg;
|
||||||
void (*mem_write)(void *, u16, u8);
|
// u8 (*mem_read)(void *, u16);
|
||||||
void *mem_model;
|
// void (*mem_write)(void *, u16, u8);
|
||||||
|
// void *mem_model;
|
||||||
};
|
};
|
||||||
|
|
||||||
void cpu_bind_mem_model(
|
// void cpu_bind_mem_model(
|
||||||
struct cpu *cpu,
|
// struct cpu *cpu,
|
||||||
void *mem_model,
|
// void *mem_model,
|
||||||
u8 (*mem_read)(void *, u16),
|
// u8 (*mem_read)(void *, u16),
|
||||||
void (*mem_write)(void *, u16, u8)
|
// void (*mem_write)(void *, u16, u8)
|
||||||
);
|
// );
|
||||||
|
|
||||||
void cpu_step(struct cpu *cpu);
|
void cpu_step(struct cpu *cpu);
|
||||||
int flag_isset(struct cpu *cpu, int flag);
|
int flag_isset(struct cpu *cpu, int flag);
|
||||||
|
|
24
src/dmg.c
24
src/dmg.c
|
@ -262,22 +262,22 @@ void dmg_step(void *_dmg)
|
||||||
dmg_request_interrupt(dmg, INT_LCDSTAT);
|
dmg_request_interrupt(dmg, INT_LCDSTAT);
|
||||||
}
|
}
|
||||||
|
|
||||||
int lcdc = lcd_read(dmg->lcd, REG_LCDC);
|
// int lcdc = lcd_read(dmg->lcd, REG_LCDC);
|
||||||
if (lcdc & LCDC_ENABLE_BG) {
|
// if (lcdc & LCDC_ENABLE_BG) {
|
||||||
render_background(dmg, lcdc);
|
// render_background(dmg, lcdc);
|
||||||
}
|
// }
|
||||||
|
|
||||||
if (lcdc & LCDC_ENABLE_WINDOW) {
|
// if (lcdc & LCDC_ENABLE_WINDOW) {
|
||||||
// printf("window\n");
|
// // printf("window\n");
|
||||||
}
|
// }
|
||||||
|
|
||||||
lcd_apply_scroll(dmg->lcd);
|
// lcd_apply_scroll(dmg->lcd);
|
||||||
|
|
||||||
if (lcdc & LCDC_ENABLE_OBJ) {
|
// if (lcdc & LCDC_ENABLE_OBJ) {
|
||||||
render_objs(dmg);
|
// render_objs(dmg);
|
||||||
}
|
// }
|
||||||
|
|
||||||
lcd_draw(dmg->lcd);
|
// lcd_draw(dmg->lcd);
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
int scan = lcd_read(dmg->lcd, REG_LY);
|
int scan = lcd_read(dmg->lcd, REG_LY);
|
||||||
|
|
44
src/mbc.c
44
src/mbc.c
|
@ -6,16 +6,6 @@
|
||||||
#include "dmg.h"
|
#include "dmg.h"
|
||||||
#include "rom.h"
|
#include "rom.h"
|
||||||
|
|
||||||
static int mbc_noop_read(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 *out_data)
|
|
||||||
{
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int mbc_noop_write(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 data)
|
|
||||||
{
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int mbc1_read(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 *out_data)
|
static int mbc1_read(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 *out_data)
|
||||||
{
|
{
|
||||||
if (addr >= 0x4000 && addr <= 0x7fff) {
|
if (addr >= 0x4000 && addr <= 0x7fff) {
|
||||||
|
@ -60,35 +50,29 @@ static int mbc1_write(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 data)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
struct mbc mbc_noop = {
|
|
||||||
mbc_noop_read,
|
|
||||||
mbc_noop_write,
|
|
||||||
};
|
|
||||||
|
|
||||||
struct mbc mbc1 = {
|
|
||||||
mbc1_read,
|
|
||||||
mbc1_write,
|
|
||||||
};
|
|
||||||
|
|
||||||
struct mbc *mbc_new(int type)
|
struct mbc *mbc_new(int type)
|
||||||
{
|
{
|
||||||
switch (type) {
|
static struct mbc mbc;
|
||||||
case 0:
|
if (type > 3) {
|
||||||
return &mbc_noop;
|
return NULL;
|
||||||
case 1:
|
|
||||||
case 2:
|
|
||||||
case 3:
|
|
||||||
return &mbc1;
|
|
||||||
}
|
}
|
||||||
return NULL;
|
mbc.type = type;
|
||||||
|
|
||||||
|
return &mbc;
|
||||||
}
|
}
|
||||||
|
|
||||||
int mbc_read(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 *out_data)
|
int mbc_read(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 *out_data)
|
||||||
{
|
{
|
||||||
return mbc->read_fn(mbc, dmg, addr, out_data);
|
if (mbc->type == 0) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
return mbc1_read(mbc, dmg, addr, out_data);
|
||||||
}
|
}
|
||||||
|
|
||||||
int mbc_write(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 data)
|
int mbc_write(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 data)
|
||||||
{
|
{
|
||||||
return mbc->write_fn(mbc, dmg, addr, data);
|
if (mbc->type == 0) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
return mbc1_write(mbc, dmg, addr, data);
|
||||||
}
|
}
|
||||||
|
|
|
@ -6,8 +6,6 @@
|
||||||
struct dmg;
|
struct dmg;
|
||||||
|
|
||||||
struct mbc {
|
struct mbc {
|
||||||
int (*read_fn)(struct mbc *, struct dmg *, u16, u8 *);
|
|
||||||
int (*write_fn)(struct mbc *, struct dmg *, u16, u8);
|
|
||||||
int type;
|
int type;
|
||||||
int rom_bank;
|
int rom_bank;
|
||||||
int ram_bank;
|
int ram_bank;
|
||||||
|
@ -16,7 +14,10 @@ struct mbc {
|
||||||
};
|
};
|
||||||
|
|
||||||
struct mbc *mbc_new(int type);
|
struct mbc *mbc_new(int type);
|
||||||
|
|
||||||
|
// set *out_data and return 1 if handled, return 0 for base dmg behavior
|
||||||
int mbc_read(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 *out_data);
|
int mbc_read(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 *out_data);
|
||||||
|
// return 1 if handled, return 0 for base dmg behavior
|
||||||
int mbc_write(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 data);
|
int mbc_write(struct mbc *mbc, struct dmg *dmg, u16 addr, u8 data);
|
||||||
|
|
||||||
#endif
|
#endif
|
|
@ -59,18 +59,18 @@ Rect offscreenRect = { 0, 0, 144, 160 };
|
||||||
|
|
||||||
BitMap offscreenBmp;
|
BitMap offscreenBmp;
|
||||||
|
|
||||||
int lastTicks;
|
int execTime;
|
||||||
|
|
||||||
void Render(void)
|
void Render(void)
|
||||||
{
|
{
|
||||||
long k = 0, dst, bit;
|
// long k = 0, dst, bit;
|
||||||
for (dst = 0; dst < 20 * 144; dst++) {
|
// for (dst = 0; dst < 20 * 144; dst++) {
|
||||||
for (bit = 7; bit >= 0; bit--) {
|
// for (bit = 7; bit >= 0; bit--) {
|
||||||
offscreen[dst] |= lcd.pixels[k++];
|
// offscreen[dst] |= lcd.pixels[k++];
|
||||||
offscreen[dst] <<= 1;
|
// offscreen[dst] <<= 1;
|
||||||
}
|
// }
|
||||||
dst++;
|
// dst++;
|
||||||
}
|
// }
|
||||||
|
|
||||||
/*
|
/*
|
||||||
offscreen[dst] = lcd.pixels[k++] << 7;
|
offscreen[dst] = lcd.pixels[k++] << 7;
|
||||||
|
@ -83,16 +83,25 @@ void Render(void)
|
||||||
offscreen[dst] |= lcd.pixels[k++];
|
offscreen[dst] |= lcd.pixels[k++];
|
||||||
*/
|
*/
|
||||||
SetPort(g_wp);
|
SetPort(g_wp);
|
||||||
CopyBits(&offscreenBmp, &g_wp->portBits, &offscreenRect, &offscreenRect, srcCopy, NULL);
|
// CopyBits(&offscreenBmp, &g_wp->portBits, &offscreenRect, &offscreenRect, srcCopy, NULL);
|
||||||
|
|
||||||
//EraseRect(&g_wp->portRect);
|
EraseRect(&g_wp->portRect);
|
||||||
// MoveTo(10, 160);
|
MoveTo(10, 180);
|
||||||
// char debug[128];
|
char debug[128];
|
||||||
// sprintf(debug, "PC: %04x", cpu.pc);
|
double ms = execTime / 600.0;
|
||||||
// C2PStr(debug);
|
sprintf(debug, "10000 insn %d ticks, %f ms per instruction", execTime, ms);
|
||||||
// DrawString(debug);
|
C2PStr(debug);
|
||||||
|
DrawString(debug);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// 417 ticks
|
||||||
|
// 10000 instructions
|
||||||
|
|
||||||
|
// 0.0417 tick per instruction
|
||||||
|
// 1/60 second per tick
|
||||||
|
// 0.000695 second per instruction
|
||||||
|
// 0.695 ms per instruction
|
||||||
|
|
||||||
void StartEmulation(void)
|
void StartEmulation(void)
|
||||||
{
|
{
|
||||||
g_wp = NewWindow(0, &windowBounds, WINDOW_TITLE, true,
|
g_wp = NewWindow(0, &windowBounds, WINDOW_TITLE, true,
|
||||||
|
@ -188,7 +197,7 @@ void ShowAboutBox(void)
|
||||||
// DrawDialog(dp);
|
// DrawDialog(dp);
|
||||||
// while(!GetNextEvent(mDownMask, &e));
|
// while(!GetNextEvent(mDownMask, &e));
|
||||||
// while(WaitMouseUp());
|
// while(WaitMouseUp());
|
||||||
|
|
||||||
DisposeDialog(dp);
|
DisposeDialog(dp);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -264,25 +273,26 @@ int main(int argc, char *argv[])
|
||||||
int executed;
|
int executed;
|
||||||
int paused = 0;
|
int paused = 0;
|
||||||
int pause_next = 0;
|
int pause_next = 0;
|
||||||
|
|
||||||
InitEverything();
|
InitEverything();
|
||||||
|
|
||||||
lcd_new(&lcd);
|
lcd_new(&lcd);
|
||||||
dmg_new(&dmg, &cpu, &rom, &lcd);
|
dmg_new(&dmg, &cpu, &rom, &lcd);
|
||||||
cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
|
cpu.dmg = &dmg;
|
||||||
|
// cpu_bind_mem_model(&cpu, &dmg, dmg_read, dmg_write);
|
||||||
|
|
||||||
cpu.pc = 0x100;
|
cpu.pc = 0x100;
|
||||||
|
|
||||||
int start = TickCount();
|
|
||||||
while(g_running) {
|
while(g_running) {
|
||||||
if (emulationOn) {
|
if (emulationOn) {
|
||||||
|
int k;
|
||||||
|
int start = TickCount();
|
||||||
|
for (k = 0; k < 10000; k++) {
|
||||||
dmg_step(&dmg);
|
dmg_step(&dmg);
|
||||||
int now = TickCount();
|
}
|
||||||
if (now > lastTicks + 100) {
|
execTime = TickCount() - start;
|
||||||
lastTicks = now;
|
emulationOn = false;
|
||||||
Render();
|
Render();
|
||||||
}
|
|
||||||
if (Button()) g_running = false;
|
|
||||||
} else {
|
} else {
|
||||||
if(WaitNextEvent(everyEvent, &evt, 0, 0) != nullEvent) {
|
if(WaitNextEvent(everyEvent, &evt, 0, 0) != nullEvent) {
|
||||||
if (IsDialogEvent(&evt)) {
|
if (IsDialogEvent(&evt)) {
|
||||||
|
|
Loading…
Reference in New Issue