8dbf5f6c17
This patch adds big-endian compatibility in gpsp (in general but only for the interpreter). There's no performance hit for little-endian platforms (should be a no-op) and only add a small overhead in memory accesses for big-endian platforms. Most memory accesses are wrapped with a byteswap instruction and I/O reg accesses are also rewired for proper access (using macros). Video rendering has been fixed to also do byteswaps but there's a couple of games and rendering modes that still seem broken (but they amount to less than 20 games in my tests with 1K ROMs). This also adds build rules and CI for NGC/WII/WIIU (untested)
143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/* gameplaySP
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*
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* Copyright (C) 2006 Exophase <exophase@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "common.h"
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bool libretro_supports_bitmasks = false;
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bool libretro_supports_ff_override = false;
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bool libretro_ff_enabled = false;
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bool libretro_ff_enabled_prev = false;
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unsigned turbo_period = TURBO_PERIOD_MIN;
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unsigned turbo_pulse_width = TURBO_PULSE_WIDTH_MIN;
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unsigned turbo_a_counter = 0;
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unsigned turbo_b_counter = 0;
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static u32 old_key = 0;
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static retro_input_state_t input_state_cb;
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void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
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extern void set_fastforward_override(bool fastforward);
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static void trigger_key(u32 key)
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{
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u32 p1_cnt = read_ioreg(REG_P1CNT);
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if((p1_cnt >> 14) & 0x01)
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{
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u32 key_intersection = (p1_cnt & key) & 0x3FF;
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if(p1_cnt >> 15)
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{
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if(key_intersection == (p1_cnt & 0x3FF))
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raise_interrupt(IRQ_KEYPAD);
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}
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else
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{
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if(key_intersection)
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raise_interrupt(IRQ_KEYPAD);
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}
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}
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}
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u32 update_input(void)
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{
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unsigned i;
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uint32_t new_key = 0;
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bool turbo_a = false;
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bool turbo_b = false;
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if (!input_state_cb)
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return 0;
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if (libretro_supports_bitmasks)
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{
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int16_t ret = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_MASK);
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for (i = 0; i < sizeof(btn_map) / sizeof(map); i++)
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new_key |= (ret & (1 << btn_map[i].retropad)) ? btn_map[i].gba : 0;
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libretro_ff_enabled = libretro_supports_ff_override &&
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(ret & (1 << RETRO_DEVICE_ID_JOYPAD_R2));
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turbo_a = (ret & (1 << RETRO_DEVICE_ID_JOYPAD_X));
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turbo_b = (ret & (1 << RETRO_DEVICE_ID_JOYPAD_Y));
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}
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else
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{
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for (i = 0; i < sizeof(btn_map) / sizeof(map); i++)
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new_key |= input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, btn_map[i].retropad) ? btn_map[i].gba : 0;
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libretro_ff_enabled = libretro_supports_ff_override &&
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input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R2);
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turbo_a = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X);
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turbo_b = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y);
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}
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/* Handle turbo buttons */
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if (turbo_a)
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{
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new_key |= (turbo_a_counter < turbo_pulse_width) ?
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BUTTON_A : 0;
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turbo_a_counter++;
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if (turbo_a_counter >= turbo_period)
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turbo_a_counter = 0;
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}
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else
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turbo_a_counter = 0;
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if (turbo_b)
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{
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new_key |= (turbo_b_counter < turbo_pulse_width) ?
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BUTTON_B : 0;
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turbo_b_counter++;
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if (turbo_b_counter >= turbo_period)
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turbo_b_counter = 0;
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}
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else
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turbo_b_counter = 0;
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if ((new_key | old_key) != old_key)
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trigger_key(new_key);
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old_key = new_key;
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write_ioreg(REG_P1, (~old_key) & 0x3FF);
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/* Handle fast forward button */
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if (libretro_ff_enabled != libretro_ff_enabled_prev)
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{
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set_fastforward_override(libretro_ff_enabled);
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libretro_ff_enabled_prev = libretro_ff_enabled;
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}
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return 0;
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}
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#define input_savestate_builder(type) \
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void input_##type##_savestate(void) \
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{ \
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state_mem_##type##_variable(old_key); \
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}
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input_savestate_builder(read)
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input_savestate_builder(write)
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