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Diffstat (limited to 'gas/config/vax-inst.h')
| -rw-r--r-- | gas/config/vax-inst.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/gas/config/vax-inst.h b/gas/config/vax-inst.h new file mode 100644 index 0000000..2ad8f98 --- /dev/null +++ b/gas/config/vax-inst.h @@ -0,0 +1,77 @@ +/* vax-inst.h - GNU - Part of vax.c + Copyright (C) 1987, 1992, 1995 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_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_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 */ |