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Merge pull request #184 from bkoropoff/overclock-tidy

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[Core] Improved CPU overclock granularity and added (optional) sprite limits removal support (bkoropoff)
This commit is contained in:
ekeeke 2017-10-10 10:46:16 +02:00 committed by GitHub
commit 5ec1cd099f
10 changed files with 134 additions and 73 deletions
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4
Makefile.libretro
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@ -440,8 +440,8 @@ LIBRETRO_CFLAGS += $(BPP_DEFINES) \
$(ENDIANNESS_DEFINES) \
$(PLATFORM_DEFINES) \
-D__LIBRETRO__ \
-DM68K_ALLOW_OVERCLOCK \
-DZ80_ALLOW_OVERCLOCK
-DM68K_OVERCLOCK_SHIFT=20 \
-DZ80_OVERCLOCK_SHIFT=20
ifneq (,$(findstring msvc,$(platform)))
LIBRETRO_CFLAGS += -DINLINE="static _inline"

4
core/m68k/m68k.h
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@ -268,8 +268,8 @@ typedef struct
uint address_space; /* Current FC code */
#ifdef M68K_ALLOW_OVERCLOCK
uint8 overclock_ratio;
#ifdef M68K_OVERCLOCK_SHIFT
int cycle_ratio;
#endif
/* Callbacks to host */

4
core/m68k/m68kcpu.c
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@ -319,8 +319,8 @@ void m68k_init(void)
}
#endif
#ifdef M68K_ALLOW_OVERCLOCK
m68k.overclock_ratio = 1;
#ifdef M68K_OVERCLOCK_SHIFT
m68k.cycle_ratio = 1 << M68K_OVERCLOCK_SHIFT;
#endif
#if M68K_EMULATE_INT_ACK == OPT_ON

4
core/m68k/m68kcpu.h
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@ -514,8 +514,8 @@
/* ---------------------------- Cycle Counting ---------------------------- */
#ifdef M68K_ALLOW_OVERCLOCK
#define USE_CYCLES(A) m68ki_cpu.cycles += (A) / m68ki_cpu.overclock_ratio
#ifdef M68K_OVERCLOCK_SHIFT
#define USE_CYCLES(A) m68ki_cpu.cycles += ((A) * m68ki_cpu.cycle_ratio) >> M68K_OVERCLOCK_SHIFT
#else
#define USE_CYCLES(A) m68ki_cpu.cycles += (A)
#endif

4
core/m68k/s68kcpu.c
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@ -284,8 +284,8 @@ void s68k_init(void)
}
#endif
#ifdef M68K_ALLOW_OVERCLOCK
s68k.overclock_ratio = 1;
#ifdef M68K_OVERCLOCK_SHIFT
s68k.cycle_ratio = 1 << M68K_OVERCLOCK_SHIFT;
#endif
#if M68K_EMULATE_INT_ACK == OPT_ON

44
core/vdp_render.c
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@ -43,6 +43,14 @@
#include "md_ntsc.h"
#include "sms_ntsc.h"
#ifndef HAVE_NO_SPRITE_LIMIT
#define MAX_SPRITES_PER_LINE 20
#define TMS_MAX_SPRITES_PER_LINE 4
#define MODE4_MAX_SPRITES_PER_LINE 8
#define MODE5_MAX_SPRITES_PER_LINE (bitmap.viewport.w >> 4)
#define MODE5_MAX_SPRITE_PIXELS max_sprite_pixels
#endif
/*** NTSC Filters ***/
extern md_ntsc_t *md_ntsc;
extern sms_ntsc_t *sms_ntsc;
@ -584,7 +592,7 @@ typedef struct
uint16 size;
} object_info_t;
static object_info_t obj_info[2][20];
static object_info_t obj_info[2][MAX_SPRITES_PER_LINE];
/* Sprite Counter */
static uint8 object_count[2];
@ -3149,6 +3157,7 @@ void render_obj_m5(int line)
int xpos, width;
int pixelcount = 0;
int masked = 0;
int max_pixels = MODE5_MAX_SPRITE_PIXELS;
uint8 *src, *s, *lb;
uint32 temp, v_line;
@ -3213,10 +3222,10 @@ void render_obj_m5(int line)
lb = &linebuf[0][0x20 + xpos];
/* Max. number of sprite pixels rendered per line */
if (pixelcount > max_sprite_pixels)
if (pixelcount > max_pixels)
{
/* Adjust number of pixels to draw */
width -= (pixelcount - max_sprite_pixels);
width -= (pixelcount - max_pixels);
}
/* Number of tiles to draw */
@ -3235,7 +3244,7 @@ void render_obj_m5(int line)
}
/* Sprite limit */
if (pixelcount >= max_sprite_pixels)
if (pixelcount >= max_pixels)
{
/* Sprite masking is effective on next line if max pixel width is reached */
spr_ovr = (pixelcount >= bitmap.viewport.w);
@ -3258,6 +3267,7 @@ void render_obj_m5_ste(int line)
int xpos, width;
int pixelcount = 0;
int masked = 0;
int max_pixels = MODE5_MAX_SPRITE_PIXELS;
uint8 *src, *s, *lb;
uint32 temp, v_line;
@ -3325,9 +3335,9 @@ void render_obj_m5_ste(int line)
lb = &linebuf[1][0x20 + xpos];
/* Adjust number of pixels to draw for sprite limit */
if (pixelcount > max_sprite_pixels)
if (pixelcount > max_pixels)
{
width -= (pixelcount - max_sprite_pixels);
width -= (pixelcount - max_pixels);
}
/* Number of tiles to draw */
@ -3346,7 +3356,7 @@ void render_obj_m5_ste(int line)
}
/* Sprite limit */
if (pixelcount >= max_sprite_pixels)
if (pixelcount >= max_pixels)
{
/* Sprite masking is effective on next line if max pixel width is reached */
spr_ovr = (pixelcount >= bitmap.viewport.w);
@ -3376,6 +3386,7 @@ void render_obj_m5_im2(int line)
int pixelcount = 0;
int masked = 0;
int odd = odd_frame;
int max_pixels = MODE5_MAX_SPRITE_PIXELS;
uint8 *src, *s, *lb;
uint32 temp, v_line;
@ -3440,9 +3451,9 @@ void render_obj_m5_im2(int line)
lb = &linebuf[0][0x20 + xpos];
/* Adjust width for sprite limit */
if (pixelcount > max_sprite_pixels)
if (pixelcount > max_pixels)
{
width -= (pixelcount - max_sprite_pixels);
width -= (pixelcount - max_pixels);
}
/* Number of tiles to draw */
@ -3461,7 +3472,7 @@ void render_obj_m5_im2(int line)
}
/* Sprite Limit */
if (pixelcount >= max_sprite_pixels)
if (pixelcount >= max_pixels)
{
/* Sprite masking is effective on next line if max pixel width is reached */
spr_ovr = (pixelcount >= bitmap.viewport.w);
@ -3485,6 +3496,7 @@ void render_obj_m5_im2_ste(int line)
int pixelcount = 0;
int masked = 0;
int odd = odd_frame;
int max_pixels = MODE5_MAX_SPRITE_PIXELS;
uint8 *src, *s, *lb;
uint32 temp, v_line;
@ -3552,9 +3564,9 @@ void render_obj_m5_im2_ste(int line)
lb = &linebuf[1][0x20 + xpos];
/* Adjust width for sprite limit */
if (pixelcount > max_sprite_pixels)
if (pixelcount > max_pixels)
{
width -= (pixelcount - max_sprite_pixels);
width -= (pixelcount - max_pixels);
}
/* Number of tiles to draw */
@ -3573,7 +3585,7 @@ void render_obj_m5_im2_ste(int line)
}
/* Sprite Limit */
if (pixelcount >= max_sprite_pixels)
if (pixelcount >= max_pixels)
{
/* Sprite masking is effective on next line if max pixel width is reached */
spr_ovr = (pixelcount >= bitmap.viewport.w);
@ -3654,7 +3666,7 @@ void parse_satb_tms(int line)
if ((ypos >= 0) && (ypos < height))
{
/* Sprite overflow */
if (count == 4)
if (count == TMS_MAX_SPRITES_PER_LINE)
{
/* Flag is set only during active area */
if (line < bitmap.viewport.h)
@ -3750,7 +3762,7 @@ void parse_satb_m4(int line)
if ((ypos >= 0) && (ypos < height))
{
/* Sprite overflow */
if (count == 8)
if (count == MODE4_MAX_SPRITES_PER_LINE)
{
/* Flag is set only during active area */
if ((line >= 0) && (line < bitmap.viewport.h))
@ -3796,7 +3808,7 @@ void parse_satb_m5(int line)
int count = 0;
/* max. number of rendered sprites (16 or 20 sprites per line by default) */
int max = bitmap.viewport.w >> 4;
int max = MODE5_MAX_SPRITES_PER_LINE;
/* max. number of parsed sprites (64 or 80 sprites per line by default) */
int total = max_sprite_pixels >> 2;

13
core/z80/z80.c
View File

@ -201,18 +201,15 @@
#define IFF2 Z80.iff2
#define HALT Z80.halt
#ifdef Z80_ALLOW_OVERCLOCK
#define USE_CYCLES(A) Z80.cycles += (A) / z80_overclock_ratio
#ifdef Z80_OVERCLOCK_SHIFT
#define USE_CYCLES(A) Z80.cycles += ((A) * z80_cycle_ratio) >> Z80_OVERCLOCK_SHIFT
UINT32 z80_cycle_ratio;
#else
#define USE_CYCLES(A) Z80.cycles += (A)
#endif
Z80_Regs Z80;
#ifdef Z80_ALLOW_OVERCLOCK
UINT8 z80_overclock_ratio;
#endif
unsigned char *z80_readmap[64];
unsigned char *z80_writemap[64];
@ -3368,8 +3365,8 @@ void z80_init(const void *config, int (*irqcallback)(int))
memset(&Z80, 0, sizeof(Z80));
Z80.daisy = config;
Z80.irq_callback = irqcallback;
#ifdef Z80_ALLOW_OVERCLOCK
z80_overclock_ratio = 1;
#ifdef Z80_OVERCLOCK_SHIFT
z80_cycle_ratio = 1 << Z80_OVERCLOCK_SHIFT;
#endif
/* Clear registers values (NB: should be random on real hardware ?) */

4
core/z80/z80.h
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@ -51,8 +51,8 @@ typedef struct
extern Z80_Regs Z80;
#ifdef Z80_ALLOW_OVERCLOCK
extern UINT8 z80_overclock_ratio;
#ifdef Z80_OVERCLOCK_SHIFT
extern UINT32 z80_cycle_ratio;
#endif
extern unsigned char *z80_readmap[64];

114
libretro/libretro.c
View File

@ -54,12 +54,6 @@
#include <xtl.h>
#endif
#if defined(M68K_ALLOW_OVERCLOCK) || defined(Z80_ALLOW_OVERCLOCK)
#define HAVE_OVERCLOCK
/* Overclocking frame delay (hack) */
#define OVERCLOCK_FRAME_DELAY 100
#endif
#define RETRO_DEVICE_MDPAD_3B RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0)
#define RETRO_DEVICE_MDPAD_6B RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 1)
#define RETRO_DEVICE_MSPAD_2B RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 2)
@ -82,6 +76,25 @@
#include "sms_ntsc.h"
#include <streams/file_stream.h>
#define STATIC_ASSERT(name, test) typedef struct { int assert_[(test)?1:-1]; } assert_ ## name ## _
#define M68K_MAX_CYCLES 1107
#define Z80_MAX_CYCLES 345
#define OVERCLOCK_FRAME_DELAY 100
#ifdef M68K_OVERCLOCK_SHIFT
#define HAVE_OVERCLOCK
STATIC_ASSERT(m68k_overflow,
M68K_MAX_CYCLES <= UINT_MAX >> (M68K_OVERCLOCK_SHIFT + 1));
#endif
#ifdef Z80_OVERCLOCK_SHIFT
#ifndef HAVE_OVERCLOCK
#define HAVE_OVERCLOCK
#endif
STATIC_ASSERT(z80_overflow,
Z80_MAX_CYCLES <= UINT_MAX >> (Z80_OVERCLOCK_SHIFT + 1));
#endif
sms_ntsc_t *sms_ntsc;
md_ntsc_t *md_ntsc;
@ -541,8 +554,9 @@ static void config_default(void)
config.lock_on = 0;
config.lcd = 0; /* 0.8 fixed point */
#ifdef HAVE_OVERCLOCK
config.overclock = 0;
config.overclock = 100;
#endif
config.no_sprite_limit = 0;
/* video options */
config.overscan = 0;
@ -811,6 +825,31 @@ static bool update_viewport(void)
return ((ow != vwidth) || (oh != vheight) || (oar != vaspect_ratio));
}
#ifdef HAVE_OVERCLOCK
static void update_overclock(void)
{
#ifdef M68K_OVERCLOCK_SHIFT
m68k.cycle_ratio = 1 << M68K_OVERCLOCK_SHIFT;
#endif
#ifdef Z80_OVERCLOCK_SHIFT
z80_cycle_ratio = 1 << Z80_OVERCLOCK_SHIFT;
#endif
if (overclock_delay == 0)
{
/* Cycle ratios multiply per-instruction cycle counts, so use
reciprocals */
#ifdef M68K_OVERCLOCK_SHIFT
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
m68k.cycle_ratio = (100 << M68K_OVERCLOCK_SHIFT) / config.overclock;
#endif
#ifdef Z80_OVERCLOCK_SHIFT
if ((system_hw & SYSTEM_PBC) != SYSTEM_MD)
z80_cycle_ratio = (100 << Z80_OVERCLOCK_SHIFT) / config.overclock;
#endif
}
}
#endif
static void check_variables(void)
{
unsigned orig_value;
@ -1270,13 +1309,31 @@ static void check_variables(void)
var.key = "genesis_plus_gx_overclock";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
{
if (strcmp(var.value, "1x") == 0)
config.overclock = 0;
else if (strcmp(var.value, "2x") == 0)
config.overclock = 1;
if (strcmp(var.value, "100%") == 0)
config.overclock = 100;
else if (strcmp(var.value, "125%") == 0)
config.overclock = 125;
else if (strcmp(var.value, "150%") == 0)
config.overclock = 150;
else if (strcmp(var.value, "175%") == 0)
config.overclock = 175;
else if (strcmp(var.value, "200%") == 0)
config.overclock = 200;
if (system_hw)
update_overclock();
}
#endif
var.key = "genesis_plus_gx_no_sprite_limit";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
{
if (strcmp(var.value, "disabled") == 0)
config.no_sprite_limit = 0;
else
config.no_sprite_limit = 1;
}
if (reinit)
{
#ifdef HAVE_OVERCLOCK
@ -1722,8 +1779,9 @@ void retro_set_environment(retro_environment_t cb)
{ "genesis_plus_gx_gun_cursor", "Show Lightgun crosshair; disabled|enabled" },
{ "genesis_plus_gx_invert_mouse", "Invert Mouse Y-axis; disabled|enabled" },
#ifdef HAVE_OVERCLOCK
{ "genesis_plus_gx_overclock", "Overclock CPU; 1x|2x" },
{ "genesis_plus_gx_overclock", "CPU speed; 100%|125%|150%|175%|200%" },
#endif
{ "genesis_plus_gx_no_sprite_limit", "Remove per-line sprite limit; disabled|enabled" },
{ NULL, NULL },
};
@ -2069,6 +2127,7 @@ bool retro_unserialize(const void *data, size_t size)
#ifdef HAVE_OVERCLOCK
overclock_delay = OVERCLOCK_FRAME_DELAY;
update_overclock();
#endif
return TRUE;
@ -2235,9 +2294,6 @@ bool retro_load_game(const struct retro_game_info *info)
}
}
#ifdef HAVE_OVERCLOCK
overclock_delay = OVERCLOCK_FRAME_DELAY;
#endif
audio_init(SOUND_FREQUENCY, 0);
system_init();
system_reset();
@ -2248,6 +2304,11 @@ bool retro_load_game(const struct retro_game_info *info)
update_viewport();
#ifdef HAVE_OVERCLOCK
overclock_delay = OVERCLOCK_FRAME_DELAY;
update_overclock();
#endif
return true;
}
@ -2355,6 +2416,7 @@ void retro_reset(void)
{
#ifdef HAVE_OVERCLOCK
overclock_delay = OVERCLOCK_FRAME_DELAY;
update_overclock();
#endif
gen_reset(0);
}
@ -2366,38 +2428,20 @@ void retro_run(void)
#ifdef HAVE_OVERCLOCK
/* update overclock delay */
if (overclock_delay)
overclock_delay--;
if (overclock_delay && --overclock_delay == 0)
update_overclock();
#endif
if (system_hw == SYSTEM_MCD)
{
#ifdef M68K_ALLOW_OVERCLOCK
if (config.overclock && overclock_delay == 0)
m68k.overclock_ratio = 2;
else
m68k.overclock_ratio = 1;
#endif
system_frame_scd(0);
}
else if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
#ifdef M68K_ALLOW_OVERCLOCK
if (config.overclock && overclock_delay == 0)
m68k.overclock_ratio = 2;
else
m68k.overclock_ratio = 1;
#endif
system_frame_gen(0);
}
else
{
#ifdef Z80_ALLOW_OVERCLOCK
if (config.overclock && overclock_delay == 0)
z80_overclock_ratio = 2;
else
z80_overclock_ratio = 1;
#endif
system_frame_sms(0);
}

12
libretro/osd.h
View File

@ -76,7 +76,14 @@ typedef unsigned char bool;
#define HAVE_YM3438_CORE
typedef struct
#define HAVE_NO_SPRITE_LIMIT
#define MAX_SPRITES_PER_LINE 80
#define TMS_MAX_SPRITES_PER_LINE (config.no_sprite_limit ? MAX_SPRITES_PER_LINE : 4)
#define MODE4_MAX_SPRITES_PER_LINE (config.no_sprite_limit ? MAX_SPRITES_PER_LINE : 8)
#define MODE5_MAX_SPRITES_PER_LINE (config.no_sprite_limit ? MAX_SPRITES_PER_LINE : (bitmap.viewport.w >> 4))
#define MODE5_MAX_SPRITE_PIXELS (config.no_sprite_limit ? MAX_SPRITES_PER_LINE * 32 : max_sprite_pixels)
typedef struct
{
int8 device;
uint8 port;
@ -120,7 +127,8 @@ struct
t_input_config input[MAX_INPUTS];
uint8 invert_mouse;
uint8 gun_cursor;
uint8 overclock;
uint32 overclock;
uint8 no_sprite_limit;
} config;
extern char GG_ROM[256];