/* vax-inst.h - GNU - Part of vax.c Copyright 1987, 1992, 1995, 2000, 2002 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. GAS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GAS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GAS; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* * This is part of vax-ins-parse.c & friends. * We want to parse a vax instruction text into a tree defined here. */ #define VIT_MAX_OPERANDS (6) /* maximum number of operands in one */ /* single vax instruction */ struct vop /* vax instruction operand */ { short int vop_ndx; /* -1, or index register. eg 7=[R7] */ short int vop_reg; /* -1, or register number. eg @I^#=0xF */ /* Helps distinguish "abs" from "abs(PC)". */ short int vop_mode; /* addressing mode 4 bits. eg I^#=0x9 */ char vop_short; /* operand displacement length as written */ /* ' '=none, "bilsw"=B^I^L^S^W^. */ char vop_access; /* 'b'branch ' 'no-instruction 'amrvw'norm */ char vop_width; /* Operand width, one of "bdfghloqw" */ const char *vop_warn; /* warning message of this operand, if any */ const char *vop_error; /* say if operand is inappropriate */ char *vop_expr_begin; /* Unparsed expression, 1st char ... */ char *vop_expr_end; /* ... last char. */ unsigned char vop_nbytes; /* number of bytes in datum */ }; typedef long vax_opcodeT; /* For initialising array of opcodes */ /* Some synthetic opcodes > 16 bits! */ #define VIT_OPCODE_SYNTHETIC 0x80000000 /* Not real hardware instruction. */ #define VIT_OPCODE_SPECIAL 0x40000000 /* Not normal branch optimising. */ /* Never set without ..._SYNTHETIC */ #define VAX_WIDTH_UNCONDITIONAL_JUMP '-' /* These are encoded into */ #define VAX_WIDTH_CONDITIONAL_JUMP '?' /* vop_width when vop_access=='b' */ #define VAX_WIDTH_WORD_JUMP '!' /* and VIT_OPCODE_SYNTHETIC set. */ #define VAX_WIDTH_BYTE_JUMP ':' /* */ #define VAX_JSB (0x16) /* Jump to subroutine */ #define VAX_JMP (0x17) /* Useful for branch optimising. Jump instr*/ #define VAX_PC_RELATIVE_MODE (0xef) /* Use it after VAX_JMP */ #define VAX_ABSOLUTE_MODE (0x9F)/* Use as @#... */ #define VAX_BRB (0x11) /* Canonical branch. */ #define VAX_BRW (0x31) /* Another canonical branch */ #define VAX_CALLS (0xFB) /* Call with arg list on stack */ #define VAX_CALLG (0xFA) /* Call with arg list in memory */ #define VAX_WIDEN_WORD (0x20) /* Add this to byte branch to get word br. */ #define VAX_WIDEN_LONG (0x6) /* Add this to byte branch to get long jmp.*/ /* Needs VAX_PC_RELATIVE_MODE byte after it*/ struct vit /* vax instruction tree */ { /* vit_opcode is char[] for portability. */ char vit_opcode[sizeof (vax_opcodeT)]; unsigned char vit_opcode_nbytes; /* How long is _opcode? (chars) */ unsigned char vit_operands; /* */ struct vop vit_operand[VIT_MAX_OPERANDS]; /* operands */ const char *vit_error; /* "" or error text */ }; /* end of vax-inst.h */