7 *		Copyright (C) 1991-2004 SciTech Software, Inc.
8 *				     Copyright (C) David Mosberger-Tang
41 * to the 256 byte-"opcodes" found on the 8086.	The table which
78 /*----------------------------- Implementation ----------------------------*/
172 op1 - Instruction op code
185 	    M.x86.R_CS, M.x86.R_IP-1,op1));  in x86emuOp_illegal_op()
486     DECODE_PRINTF("PUSH\tCS\n");  in x86emuOp_push_CS()
495 Handles opcode 0x0f. Escape for two-byte opcode (286 or better)
677 Handles opcode 0x40 - 0x47
703 Handles opcode 0x48 - 0x4F
729 Handles opcode 0x50 - 0x57
755 Handles opcode 0x58 - 0x5F
894 Handles opcode 0x66 - prefix for 32-bit register
908 Handles opcode 0x67 - prefix for 32-bit address
1242 Handles opcode 0x70 - 0x7F
1248     s8 offset;  in x86emuOp_jump_near_cond()  local
1252     /* jump to byte offset if overflow flag is set */  in x86emuOp_jump_near_cond()
1255     offset = (s8)fetch_byte_imm();  in x86emuOp_jump_near_cond()
1256     target = (u16)(M.x86.R_IP + (s16)offset);  in x86emuOp_jump_near_cond()
2207 Handles opcode 0x91-0x97
2435     u16 offset;  in x86emuOp_mov_AL_M_IMM()  local
2439     offset = fetch_word_imm();  in x86emuOp_mov_AL_M_IMM()
2440     DECODE_PRINTF2("[%04x]\n", offset);  in x86emuOp_mov_AL_M_IMM()
2442     M.x86.R_AL = fetch_data_byte(offset);  in x86emuOp_mov_AL_M_IMM()
2453     u16 offset;  in x86emuOp_mov_AX_M_IMM()  local
2456     offset = fetch_word_imm();  in x86emuOp_mov_AX_M_IMM()
2458 	DECODE_PRINTF2("MOV\tEAX,[%04x]\n", offset);  in x86emuOp_mov_AX_M_IMM()
2460 	DECODE_PRINTF2("MOV\tAX,[%04x]\n", offset);  in x86emuOp_mov_AX_M_IMM()
2464 	M.x86.R_EAX = fetch_data_long(offset);  in x86emuOp_mov_AX_M_IMM()
2466 	M.x86.R_AX = fetch_data_word(offset);  in x86emuOp_mov_AX_M_IMM()
2478     u16 offset;  in x86emuOp_mov_M_AL_IMM()  local
2482     offset = fetch_word_imm();  in x86emuOp_mov_M_AL_IMM()
2483     DECODE_PRINTF2("[%04x],AL\n", offset);  in x86emuOp_mov_M_AL_IMM()
2485     store_data_byte(offset, M.x86.R_AL);  in x86emuOp_mov_M_AL_IMM()
2496     u16 offset;  in x86emuOp_mov_M_AX_IMM()  local
2499     offset = fetch_word_imm();  in x86emuOp_mov_M_AX_IMM()
2501 	DECODE_PRINTF2("MOV\t[%04x],EAX\n", offset);  in x86emuOp_mov_M_AX_IMM()
2503 	DECODE_PRINTF2("MOV\t[%04x],AX\n", offset);  in x86emuOp_mov_M_AX_IMM()
2507 	store_data_long(offset, M.x86.R_EAX);  in x86emuOp_mov_M_AX_IMM()
2509 	store_data_word(offset, M.x86.R_AX);  in x86emuOp_mov_M_AX_IMM()
2528 	inc = -1;  in x86emuOp_movs_byte()
2540     while (count--) {  in x86emuOp_movs_byte()
2564 	    inc = -4;  in x86emuOp_movs_word()
2570 	    inc = -2;  in x86emuOp_movs_word()
2583     while (count--) {  in x86emuOp_movs_word()
2611 	inc = -1;  in x86emuOp_cmps_byte()
2622 	    M.x86.R_CX -= 1;  in x86emuOp_cmps_byte()
2658 	inc = -inc;  in x86emuOp_cmps_word()
2674 	    M.x86.R_CX -= 1;  in x86emuOp_cmps_word()
2754 	inc = -1;  in x86emuOp_stos_byte()
2763 	    M.x86.R_CX -= 1;  in x86emuOp_stos_byte()
2788 	    inc = -4;  in x86emuOp_stos_word()
2794 	    inc = -2;  in x86emuOp_stos_word()
2807     while (count--) {  in x86emuOp_stos_word()
2831 	inc = -1;  in x86emuOp_lods_byte()
2839 	    M.x86.R_CX -= 1;  in x86emuOp_lods_byte()
2864 	    inc = -4;  in x86emuOp_lods_word()
2870 	    inc = -2;  in x86emuOp_lods_word()
2883     while (count--) {  in x86emuOp_lods_word()
2908 	inc = -1;  in x86emuOp_scas_byte()
2917 	    M.x86.R_CX -= 1;  in x86emuOp_scas_byte()
2929 	    M.x86.R_CX -= 1;  in x86emuOp_scas_byte()
2957 	    inc = -4;  in x86emuOp_scas_word()
2963 	    inc = -2;  in x86emuOp_scas_word()
2979 	    M.x86.R_CX -= 1;  in x86emuOp_scas_word()
2996 	    M.x86.R_CX -= 1;  in x86emuOp_scas_word()
3018 Handles opcode 0xb0 - 0xb7
3038 Handles opcode 0xb8 - 0xbf
3452 	    M.x86.R_BP -= 2;  in x86emuOp_enter()
3458     M.x86.R_SP = (u16)(M.x86.R_SP - local);  in x86emuOp_enter()
3976     /* note the type change here --- returning AL and AH in AX. */  in x86emuOp_aam()
4032     M.x86.R_CX -= 1;  in x86emuOp_loopne()
4053     M.x86.R_CX -= 1;  in x86emuOp_loope()
4074     M.x86.R_CX -= 1;  in x86emuOp_loop()
4088     s8	offset;  in x86emuOp_jcxz()  local
4090     /* jump to byte offset if overflow flag is set */  in x86emuOp_jcxz()
4093     offset = (s8)fetch_byte_imm();  in x86emuOp_jcxz()
4094     target = (u16)(M.x86.R_IP + offset);  in x86emuOp_jcxz()
4259     s8 offset;  in x86emuOp_jump_byte_IMM()  local
4263     offset = (s8)fetch_byte_imm();  in x86emuOp_jump_byte_IMM()
4264     target = (u16)(M.x86.R_IP + offset);  in x86emuOp_jump_byte_IMM()