/* * libDASM * * Copyright (C) 2000-2003 Patrick Alken * This library comes with absolutely NO WARRANTY * * Should you choose to use and/or modify this source code, please * do so under the terms of the GNU General Public License under which * this library is distributed. * * $Id: common-x86.h,v 1.1.1.1 2004/04/26 00:40:23 pa33 Exp $ * * This header file contains definitions common to both the * assembler and disassembler. */#ifndef INCLUDED_common_x86_h#define INCLUDED_common_x86_h/* * This struct contains information on each x86 instruction * and is used to construct instruction/opcode tables used * by the assembler and disassembler. */struct x86OpCode{  int name;           /* name of symbolic instruction */  int OperandCount;   /* number of operands */  long operands[3];   /* array containing operand types */  char *mcode;        /* machine code the instruction assembles to */  int oplen;          /* length of mcode - can't use strlen if \x00's */  int digit;          /* ModR/M digit if there is one */  /*   *  This array is used to store extra information about registers   * for each operand. Each index of this array corresponds to the   * same index of operands[]. One use of this array is to represent   * general registers such as "al". In these cases, the slot in   * opinfo[] will be the index of Registers[] corresponding to   * the register we want. Suppose operands[0] requires the al   * register. It will have the REGISTER bit set, and opinfo[0]   * will be set to R_AL.   *  The second use of this array is for the instructions using   * the control, debug, or fpu registers. If an operand specifically   * needs fpu(1), it will have the REG_FPU bit set, and the   * corresponding index of opinfo[] will be set to 1.   */  short opinfo[3];};/* * This is the value the indices of opinfo[] will take on if * there is no register number for the opcode */#define NOOPARG  (-1)/* * Test whether an opcode uses a ModR/M byte */#define x86UsesModRM(x)   ( ((x)->digit >= 0) && ((x)->digit <= 7) )/* * Test whether an opcode is defined with +rb/+rw/+rd/+i */#define x86UsesRegFPU(x)  ( ((x)->digit == REGCODE) || ((x)->digit == FPUCODE) )#endif /* INCLUDED_common_x86_h */