2013-08-22 22:54:59 +00:00
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/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: 386/486 CPU Emulation Library
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* FILE: opcodes.c
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* PURPOSE: Opcode handlers.
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*/
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/* INCLUDES *******************************************************************/
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// #define WIN32_NO_STATUS
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// #define _INC_WINDOWS
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#include <windef.h>
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#include <soft386.h>
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#include "opcodes.h"
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#include "common.h"
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// #define NDEBUG
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#include <debug.h>
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/* PUBLIC VARIABLES ***********************************************************/
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SOFT386_OPCODE_HANDLER_PROC
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Soft386OpcodeHandlers[SOFT386_NUM_OPCODE_HANDLERS] =
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{
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2013-08-24 11:48:38 +00:00
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NULL, // TODO: OPCODE 0x00 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x01 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x02 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x03 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x04 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x05 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x06 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x07 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x08 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x09 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x0A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x0B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x0C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x0D NOT SUPPORTED
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NULL, // TODO: OPCODE 0x0E NOT SUPPORTED
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NULL, // TODO: OPCODE 0x0F NOT SUPPORTED
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NULL, // TODO: OPCODE 0x10 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x11 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x12 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x13 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x14 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x15 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x16 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x17 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x18 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x19 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x1A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x1B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x1C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x1D NOT SUPPORTED
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NULL, // TODO: OPCODE 0x1E NOT SUPPORTED
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NULL, // TODO: OPCODE 0x1F NOT SUPPORTED
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NULL, // TODO: OPCODE 0x20 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x21 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x22 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x23 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x24 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x25 NOT SUPPORTED
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Soft386OpcodePrefix,
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NULL, // TODO: OPCODE 0x27 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x28 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x29 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x2A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x2B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x2C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x2D NOT SUPPORTED
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Soft386OpcodePrefix,
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NULL, // TODO: OPCODE 0x2F NOT SUPPORTED
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NULL, // TODO: OPCODE 0x30 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x31 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x32 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x33 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x34 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x35 NOT SUPPORTED
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Soft386OpcodePrefix,
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NULL, // TODO: OPCODE 0x37 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x38 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x39 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x3A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x3B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x3C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x3D NOT SUPPORTED
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Soft386OpcodePrefix,
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NULL, // TODO: OPCODE 0x3F NOT SUPPORTED
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2013-08-24 21:32:45 +00:00
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Soft386OpcodeIncrement,
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Soft386OpcodeIncrement,
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Soft386OpcodeIncrement,
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Soft386OpcodeIncrement,
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Soft386OpcodeIncrement,
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Soft386OpcodeIncrement,
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Soft386OpcodeIncrement,
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Soft386OpcodeIncrement,
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Soft386OpcodeDecrement,
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Soft386OpcodeDecrement,
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Soft386OpcodeDecrement,
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Soft386OpcodeDecrement,
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Soft386OpcodeDecrement,
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Soft386OpcodeDecrement,
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Soft386OpcodeDecrement,
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Soft386OpcodeDecrement,
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2013-08-24 11:48:38 +00:00
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NULL, // TODO: OPCODE 0x50 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x51 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x52 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x53 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x54 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x55 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x56 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x57 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x58 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x59 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x5A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x5B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x5C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x5D NOT SUPPORTED
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NULL, // TODO: OPCODE 0x5E NOT SUPPORTED
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NULL, // TODO: OPCODE 0x5F NOT SUPPORTED
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NULL, // TODO: OPCODE 0x60 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x61 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x62 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x63 NOT SUPPORTED
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Soft386OpcodePrefix,
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Soft386OpcodePrefix,
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Soft386OpcodePrefix,
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Soft386OpcodePrefix,
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NULL, // TODO: OPCODE 0x68 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x69 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x6A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x6B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x6C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x6D NOT SUPPORTED
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NULL, // TODO: OPCODE 0x6E NOT SUPPORTED
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NULL, // TODO: OPCODE 0x6F NOT SUPPORTED
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NULL, // TODO: OPCODE 0x70 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x71 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x72 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x73 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x74 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x75 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x76 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x77 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x78 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x79 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x7A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x7B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x7C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x7D NOT SUPPORTED
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NULL, // TODO: OPCODE 0x7E NOT SUPPORTED
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NULL, // TODO: OPCODE 0x7F NOT SUPPORTED
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NULL, // TODO: OPCODE 0x80 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x81 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x82 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x83 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x84 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x85 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x86 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x87 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x88 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x89 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x8A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x8B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x8C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x8D NOT SUPPORTED
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NULL, // TODO: OPCODE 0x8E NOT SUPPORTED
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NULL, // TODO: OPCODE 0x8F NOT SUPPORTED
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NULL, // TODO: OPCODE 0x90 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x91 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x92 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x93 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x94 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x95 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x96 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x97 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x98 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x99 NOT SUPPORTED
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NULL, // TODO: OPCODE 0x9A NOT SUPPORTED
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NULL, // TODO: OPCODE 0x9B NOT SUPPORTED
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NULL, // TODO: OPCODE 0x9C NOT SUPPORTED
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NULL, // TODO: OPCODE 0x9D NOT SUPPORTED
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NULL, // TODO: OPCODE 0x9E NOT SUPPORTED
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NULL, // TODO: OPCODE 0x9F NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA0 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA1 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA2 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA3 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA4 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA5 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA6 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA7 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA8 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xA9 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xAA NOT SUPPORTED
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NULL, // TODO: OPCODE 0xAB NOT SUPPORTED
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NULL, // TODO: OPCODE 0xAC NOT SUPPORTED
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NULL, // TODO: OPCODE 0xAD NOT SUPPORTED
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NULL, // TODO: OPCODE 0xAE NOT SUPPORTED
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NULL, // TODO: OPCODE 0xAF NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB0 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB1 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB2 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB3 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB4 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB5 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB6 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB7 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB8 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xB9 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xBA NOT SUPPORTED
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NULL, // TODO: OPCODE 0xBB NOT SUPPORTED
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NULL, // TODO: OPCODE 0xBC NOT SUPPORTED
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NULL, // TODO: OPCODE 0xBD NOT SUPPORTED
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NULL, // TODO: OPCODE 0xBE NOT SUPPORTED
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NULL, // TODO: OPCODE 0xBF NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC0 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC1 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC2 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC3 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC4 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC5 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC6 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC7 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC8 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xC9 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xCA NOT SUPPORTED
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NULL, // TODO: OPCODE 0xCB NOT SUPPORTED
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NULL, // TODO: OPCODE 0xCC NOT SUPPORTED
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NULL, // TODO: OPCODE 0xCD NOT SUPPORTED
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NULL, // TODO: OPCODE 0xCE NOT SUPPORTED
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NULL, // TODO: OPCODE 0xCF NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD0 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD1 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD2 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD3 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD4 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD5 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD6 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD7 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD8 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xD9 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xDA NOT SUPPORTED
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NULL, // TODO: OPCODE 0xDB NOT SUPPORTED
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NULL, // TODO: OPCODE 0xDC NOT SUPPORTED
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NULL, // TODO: OPCODE 0xDD NOT SUPPORTED
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NULL, // TODO: OPCODE 0xDE NOT SUPPORTED
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NULL, // TODO: OPCODE 0xDF NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE0 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE1 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE2 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE3 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE4 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE5 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE6 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE7 NOT SUPPORTED
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NULL, // TODO: OPCODE 0xE8 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xE9 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xEA NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xEB NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xEC NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xED NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xEE NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xEF NOT SUPPORTED
|
|
|
|
|
Soft386OpcodePrefix,
|
|
|
|
|
NULL, // Invalid
|
|
|
|
|
Soft386OpcodePrefix,
|
|
|
|
|
Soft386OpcodePrefix,
|
|
|
|
|
NULL, // TODO: OPCODE 0xF4 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xF5 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xF6 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xF7 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xF8 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xF9 NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xFA NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xFB NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xFC NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xFD NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xFE NOT SUPPORTED
|
|
|
|
|
NULL, // TODO: OPCODE 0xFF NOT SUPPORTED
|
2013-08-22 22:54:59 +00:00
|
|
|
};
|
2013-08-24 11:48:38 +00:00
|
|
|
|
|
|
|
|
BOOLEAN
|
|
|
|
|
FASTCALL
|
|
|
|
|
Soft386OpcodePrefix(PSOFT386_STATE State, UCHAR Opcode)
|
|
|
|
|
{
|
|
|
|
|
BOOLEAN Valid = FALSE;
|
|
|
|
|
|
|
|
|
|
switch (Opcode)
|
|
|
|
|
{
|
|
|
|
|
/* ES: */
|
|
|
|
|
case 0x26:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_SEG))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_SEG;
|
|
|
|
|
State->SegmentOverride = SOFT386_REG_ES;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* CS: */
|
|
|
|
|
case 0x2E:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_SEG))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_SEG;
|
|
|
|
|
State->SegmentOverride = SOFT386_REG_CS;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* SS: */
|
|
|
|
|
case 0x36:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_SEG))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_SEG;
|
|
|
|
|
State->SegmentOverride = SOFT386_REG_SS;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* DS: */
|
|
|
|
|
case 0x3E:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_SEG))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_SEG;
|
|
|
|
|
State->SegmentOverride = SOFT386_REG_DS;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* FS: */
|
|
|
|
|
case 0x64:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_SEG))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_SEG;
|
|
|
|
|
State->SegmentOverride = SOFT386_REG_FS;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* GS: */
|
|
|
|
|
case 0x65:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_SEG))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_SEG;
|
|
|
|
|
State->SegmentOverride = SOFT386_REG_GS;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* OPSIZE */
|
|
|
|
|
case 0x66:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_OPSIZE))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_OPSIZE;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ADSIZE */
|
|
|
|
|
case 0x67:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_ADSIZE))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_ADSIZE;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* LOCK */
|
|
|
|
|
case 0xF0:
|
|
|
|
|
{
|
|
|
|
|
if (!(State->PrefixFlags & SOFT386_PREFIX_LOCK))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_LOCK;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* REPNZ */
|
|
|
|
|
case 0xF2:
|
|
|
|
|
{
|
|
|
|
|
/* Mutually exclusive with REP */
|
|
|
|
|
if (!(State->PrefixFlags
|
|
|
|
|
& (SOFT386_PREFIX_REPNZ | SOFT386_PREFIX_REP)))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_REPNZ;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* REP / REPZ */
|
|
|
|
|
case 0xF3:
|
|
|
|
|
{
|
|
|
|
|
/* Mutually exclusive with REPNZ */
|
|
|
|
|
if (!(State->PrefixFlags
|
|
|
|
|
& (SOFT386_PREFIX_REPNZ | SOFT386_PREFIX_REP)))
|
|
|
|
|
{
|
|
|
|
|
State->PrefixFlags |= SOFT386_PREFIX_REP;
|
|
|
|
|
Valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!Valid)
|
|
|
|
|
{
|
|
|
|
|
/* Clear all prefixes */
|
|
|
|
|
State->PrefixFlags = 0;
|
|
|
|
|
|
|
|
|
|
/* Throw an exception */
|
|
|
|
|
Soft386Exception(State, SOFT386_EXCEPTION_UD);
|
|
|
|
|
return FALSE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return TRUE;
|
|
|
|
|
}
|
2013-08-24 21:32:45 +00:00
|
|
|
|
|
|
|
|
BOOLEAN
|
|
|
|
|
FASTCALL
|
|
|
|
|
Soft386OpcodeIncrement(PSOFT386_STATE State, UCHAR Opcode)
|
|
|
|
|
{
|
|
|
|
|
ULONG Value;
|
|
|
|
|
BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
|
|
|
|
|
|
|
|
|
|
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
|
|
|
|
|
{
|
|
|
|
|
/* The OPSIZE prefix toggles the size */
|
|
|
|
|
Size = !Size;
|
|
|
|
|
}
|
|
|
|
|
else if (State->PrefixFlags != 0)
|
|
|
|
|
{
|
|
|
|
|
/* Invalid prefix */
|
|
|
|
|
Soft386Exception(State, SOFT386_EXCEPTION_UD);
|
|
|
|
|
return FALSE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Make sure this is the right instruction */
|
|
|
|
|
ASSERT((Opcode & 0xF8) == 0x40);
|
|
|
|
|
|
|
|
|
|
if (Size)
|
|
|
|
|
{
|
|
|
|
|
Value = ++State->GeneralRegs[Opcode & 0x07].Long;
|
|
|
|
|
|
|
|
|
|
State->Flags.Of = (Value == SIGN_FLAG_LONG) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Sf = (Value & SIGN_FLAG_LONG) ? TRUE : FALSE;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
Value = ++State->GeneralRegs[Opcode & 0x07].LowWord;
|
|
|
|
|
|
|
|
|
|
State->Flags.Of = (Value == SIGN_FLAG_WORD) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Sf = (Value & SIGN_FLAG_WORD) ? TRUE : FALSE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
State->Flags.Zf = (Value == 0) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Af = ((Value & 0x0F) == 0) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Pf = Soft386CalculateParity(LOBYTE(Value));
|
|
|
|
|
|
|
|
|
|
/* Return success */
|
|
|
|
|
return TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
BOOLEAN
|
|
|
|
|
FASTCALL
|
|
|
|
|
Soft386OpcodeDecrement(PSOFT386_STATE State, UCHAR Opcode)
|
|
|
|
|
{
|
|
|
|
|
ULONG Value;
|
|
|
|
|
BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
|
|
|
|
|
|
|
|
|
|
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
|
|
|
|
|
{
|
|
|
|
|
/* The OPSIZE prefix toggles the size */
|
|
|
|
|
Size = !Size;
|
|
|
|
|
}
|
|
|
|
|
else if (State->PrefixFlags != 0)
|
|
|
|
|
{
|
|
|
|
|
/* Invalid prefix */
|
|
|
|
|
Soft386Exception(State, SOFT386_EXCEPTION_UD);
|
|
|
|
|
return FALSE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Make sure this is the right instruction */
|
|
|
|
|
ASSERT((Opcode & 0xF8) == 0x48);
|
|
|
|
|
|
|
|
|
|
if (Size)
|
|
|
|
|
{
|
|
|
|
|
Value = --State->GeneralRegs[Opcode & 0x07].Long;
|
|
|
|
|
|
|
|
|
|
State->Flags.Of = (Value == (SIGN_FLAG_LONG - 1)) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Sf = (Value & SIGN_FLAG_LONG) ? TRUE : FALSE;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
Value = --State->GeneralRegs[Opcode & 0x07].LowWord;
|
|
|
|
|
|
|
|
|
|
State->Flags.Of = (Value == (SIGN_FLAG_WORD - 1)) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Sf = (Value & SIGN_FLAG_WORD) ? TRUE : FALSE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
State->Flags.Zf = (Value == 0) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Af = ((Value & 0x0F) == 0x0F) ? TRUE : FALSE;
|
|
|
|
|
State->Flags.Pf = Soft386CalculateParity(LOBYTE(Value));
|
|
|
|
|
|
|
|
|
|
/* Return success */
|
|
|
|
|
return TRUE;
|
|
|
|
|
}
|
