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79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/* Interpreter fragment for the Hitachi H8/300 architecture simulator.
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Written by Steve Chamberlain of Cygnus Support.
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sac@cygnus.com
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This file is part of H8/300 sim
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THIS SOFTWARE IS NOT COPYRIGHTED
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Cygnus offers the following for use in the public domain. Cygnus
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makes no warranty with regard to the software or it's performance
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and the user accepts the software "AS IS" with all faults.
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CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO
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THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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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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sim_info()
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{
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int cycles = saved_state.reg[CYCLES];
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printf("cycles (v approximate) %10d\n", cycles);
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}
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