ES40: C:/es40/src/cpu_control.h Source File

00001 /* ES40 emulator.
00002  * Copyright (C) 2007-2008 by the ES40 Emulator Project
00003  *
00004  * WWW    : http://sourceforge.net/projects/es40
00005  * E-mail : camiel@camicom.com
00006  * 
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  * 
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00020  * 
00021  * Although this is not required, the author would appreciate being notified of, 
00022  * and receiving any modifications you may make to the source code that might serve
00023  * the general public.
00024  */
00025 
00055 #define DO_BEQ  if(!state.r[REG_1]) \
00056     add_pc(DISP_21 * 4);
00057 
00058 #define DO_BGE  if((s64) state.r[REG_1] >= 0) \
00059     add_pc(DISP_21 * 4);
00060 
00061 #define DO_BGT  if((s64) state.r[REG_1] > 0) \
00062     add_pc(DISP_21 * 4);
00063 
00064 #define DO_BLBC if(!(state.r[REG_1] & 1)) \
00065     add_pc(DISP_21 * 4);
00066 
00067 #define DO_BLBS if(state.r[REG_1] & 1) \
00068     add_pc(DISP_21 * 4);
00069 
00070 #define DO_BLE  if((s64) state.r[REG_1] <= 0) \
00071     add_pc(DISP_21 * 4);
00072 
00073 #define DO_BLT  if((s64) state.r[REG_1] < 0) \
00074     add_pc(DISP_21 * 4);
00075 
00076 #define DO_BNE  if(state.r[REG_1]) \
00077     add_pc(DISP_21 * 4);
00078 
00079 #define DO_BR                             \
00080   {                                       \
00081     state.r[REG_1] = state.pc &~U64(0x3); \
00082     add_pc(DISP_21 * 4);                  \
00083   }
00084 
00085 #define DO_BSR  DO_BR
00086 
00087 #define DO_JMP                            \
00088   {                                       \
00089     temp_64 = state.r[REG_2] &~U64(0x3);  \
00090     state.r[REG_1] = state.pc &~U64(0x3); \
00091     set_pc(temp_64 | (state.pc & 3));     \
00092   }
00093 
00094 // JSR, RET and JSR_COROUTINE is really JMP, just with different prediction bits.