mirror of
https://github.com/joncampbell123/dosbox-x.git
synced 2025-05-08 19:32:39 +08:00
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*
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* Copyright (C) 2002-2021 The DOSBox Team
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*
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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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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* Write the data from the opcode */
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switch (inst.code.save) {
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/* Byte */
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case S_C_Eb:
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inst_op1_b=inst.cond ? 1 : 0;
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case S_Eb:
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if (inst.rm<0xc0) SaveMb(inst.rm_eaa,inst_op1_b);
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else reg_8(inst.rm_eai)=inst_op1_b;
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break;
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case S_Gb:
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reg_8(inst.rm_index)=inst_op1_b;
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break;
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case S_EbGb:
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if (inst.rm<0xc0) SaveMb(inst.rm_eaa,inst_op1_b);
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else reg_8(inst.rm_eai)=inst_op1_b;
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reg_8(inst.rm_index)=inst_op2_b;
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break;
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/* Word */
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case S_Ew:
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if (inst.rm<0xc0) SaveMw(inst.rm_eaa,inst_op1_w);
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else reg_16(inst.rm_eai)=inst_op1_w;
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break;
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case S_Gw:
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reg_16(inst.rm_index)=inst_op1_w;
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break;
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case S_EwGw:
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if (inst.rm<0xc0) SaveMw(inst.rm_eaa,inst_op1_w);
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else reg_16(inst.rm_eai)=inst_op1_w;
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reg_16(inst.rm_index)=inst_op2_w;
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break;
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/* Dword */
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case S_Ed:
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if (inst.rm<0xc0) SaveMd(inst.rm_eaa,inst_op1_d);
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else reg_32(inst.rm_eai)=inst_op1_d;
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break;
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case S_EdMw: /* Special one 16 to memory, 32 zero extend to reg */
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if (inst.rm<0xc0) SaveMw(inst.rm_eaa,inst_op1_w);
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else reg_32(inst.rm_eai)=inst_op1_d;
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break;
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case S_Gd:
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reg_32(inst.rm_index)=inst_op1_d;
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break;
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case S_EdGd:
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if (inst.rm<0xc0) SaveMd(inst.rm_eaa,inst_op1_d);
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else reg_32(inst.rm_eai)=inst_op1_d;
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reg_32(inst.rm_index)=inst_op2_d;
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break;
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case S_REGb:
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reg_8(inst.code.extra)=inst_op1_b;
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break;
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case S_REGw:
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reg_16(inst.code.extra)=inst_op1_w;
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break;
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case S_REGd:
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reg_32(inst.code.extra)=inst_op1_d;
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break;
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case S_SEGm:
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if (CPU_SetSegGeneral((SegNames)inst.rm_index,inst_op1_w)) RunException();
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break;
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case S_SEGGw:
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if (CPU_SetSegGeneral((SegNames)inst.code.extra,inst_op2_w)) RunException();
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reg_16(inst.rm_index)=inst_op1_w;
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break;
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case S_SEGGd:
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if (CPU_SetSegGeneral((SegNames)inst.code.extra,inst_op2_w)) RunException();
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reg_32(inst.rm_index)=inst_op1_d;
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break;
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case S_PUSHw:
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Push_16(inst_op1_w);
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break;
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case S_PUSHd:
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Push_32(inst_op1_d);
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break;
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case S_C_AIPw:
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if (!inst.cond) goto nextopcode;
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case S_AIPw:
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SaveIP();
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reg_eip+=inst_op1_d;
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reg_eip&=0xffff;
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continue;
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case S_C_AIPd:
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if (!inst.cond) goto nextopcode;
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case S_AIPd:
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SaveIP();
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reg_eip+=inst_op1_d;
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continue;
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case S_IPIw:
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reg_esp+=Fetchw();
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case S_IP:
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SaveIP();
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reg_eip=inst_op1_d;
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continue;
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case 0:
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break;
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default:
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LOG(LOG_CPU,LOG_ERROR)("SAVE:Unhandled code %d entry %lx",inst.code.save,(unsigned long)inst.entry);
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}
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