73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/* Tail end of H8/300 simulator
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Copyright 1993 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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Written by Steve Chamberlain (sac@cygnus.com).
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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
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GNU General Public License for more details.
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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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movflags8:
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n = dst & 0x80;
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z = !(dst & 0xff);
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v = 0;
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goto next;
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movflags16:
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n = dst & 0x8000;
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z = !(dst & 0xffff);
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v = 0;
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goto next;
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aluflags8:
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n = dst & 0x80;
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z = !(dst & 0xff);
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v = ((srca & 0x80) == (srcb & 0x80)) && ((srca & 0x80) != (dst & 0x80));
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c = dst & 0x100;
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goto next;
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aluflags16:
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n = dst & 0x8000;
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z = !(dst & 0xffff);
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v = ((srca & 0x8000) == (srcb & 0x8000)) && ((srca & 0x8000) != (dst & 0x8000));
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c = dst & 0x10000;
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goto next;
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setflags:;
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SET_CCR(tmp);
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goto next;
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logflags:
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shiftflags:
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v = 0;
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incflags:
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z = !(dst & 0xff);
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n = dst & 0x80;
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goto next;
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next: ;
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pc = npc;
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if (ni > checkfreq)
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{
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ni = 0;
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SAVE_INTERPRETER_STATE();
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perifs();
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LOAD_INTERPRETER_STATE();
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#ifdef __GO32__
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if (kbhit())
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saved_state.exception = SIGINT;
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#endif
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}
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ni++;
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} while (!saved_state.exception);
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SAVE_INTERPRETER_STATE();
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}
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