| /* vax-inst.h - GNU - Part of vax.c |
| Copyright (C) 1987-2021 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 */ |
