initial import of NetBSD tree

1 files changed, 251 insertions, 0 deletions

diff --git a/gnu/usr.bin/gas/config/tc-i386.h b/gnu/usr.bin/gas/config/tc-i386.h
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+++ b/gnu/usr.bin/gas/config/tc-i386.h
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+/* tc-i386.h -- Header file for tc-i386.c
+   Copyright (C) 1989, 1992 Free Software Foundation.
+   
+   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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/*
+ * $Id: tc-i386.h,v 1.1 1995/10/18 08:39:05 deraadt Exp $
+ */
+
+#ifndef TC_I386
+#define TC_I386 1
+
+#define AOUT_MACHTYPE 134
+
+#define REVERSE_SORT_RELOCS
+
+#define LOCAL_LABELS_FB
+
+#define tc_coff_symbol_emit_hook(a)	; /* not used */
+
+   /* Local labels starts with .L */
+ /* fixme-now: this is for testing against old gas */
+/* #define LOCAL_LABEL(name) ((name)[0] == '.' && (name)[1] == 'L') */
+#define tc_aout_pre_write_hook(x)	{;} /* not used */
+#define tc_crawl_symbol_chain(a)	{;} /* not used */
+#define tc_headers_hook(a)		{;} /* not used */
+
+#define MAX_OPERANDS 3		/* max operands per insn */
+#define MAX_PREFIXES 4		/* max prefixes per opcode */
+#define MAX_IMMEDIATE_OPERANDS 2 /* max immediates per insn */
+#define MAX_MEMORY_OPERANDS 2	/* max memory ref per insn
+				 * lcall uses 2
+				 */
+/* we define the syntax here (modulo base,index,scale syntax) */
+#define REGISTER_PREFIX '%'
+#define IMMEDIATE_PREFIX '$'
+#define ABSOLUTE_PREFIX '*'
+#define PREFIX_SEPERATOR '/'
+
+#define TWO_BYTE_OPCODE_ESCAPE 0x0f
+
+#ifndef OLD_GAS
+#define NOP_OPCODE 0x90
+#else /* OLD_GAS */
+#define NOP_OPCODE 0x00
+#endif /* OLD_GAS */
+
+/* register numbers */
+#define EBP_REG_NUM 5
+#define ESP_REG_NUM 4
+    
+/* modrm_byte.regmem for twobyte escape */
+#define ESCAPE_TO_TWO_BYTE_ADDRESSING ESP_REG_NUM
+/* index_base_byte.index for no index register addressing */
+#define NO_INDEX_REGISTER ESP_REG_NUM
+/* index_base_byte.base for no base register addressing */
+#define NO_BASE_REGISTER EBP_REG_NUM
+    
+ /* these are the att as opcode suffixes, making movl --> mov, for example */
+#define DWORD_OPCODE_SUFFIX 'l'
+#define WORD_OPCODE_SUFFIX  'w'
+#define BYTE_OPCODE_SUFFIX  'b'
+    
+    /* modrm.mode = REGMEM_FIELD_HAS_REG when a register is in there */
+#define REGMEM_FIELD_HAS_REG 0x3                /* always = 0x3 */
+#define REGMEM_FIELD_HAS_MEM (~REGMEM_FIELD_HAS_REG)
+
+#define END_OF_INSN '\0'
+
+/*
+  When an operand is read in it is classified by its type.  This type includes
+  all the possible ways an operand can be used.  Thus, '%eax' is both 'register
+  # 0' and 'The Accumulator'.  In our language this is expressed by OR'ing
+  'Reg32' (any 32 bit register) and 'Acc' (the accumulator).
+  Operands are classified so that we can match given operand types with
+  the opcode table in i386-opcode.h.
+  */
+#define Unknown 0x0
+/* register */
+#define Reg8    0x1		/* 8 bit reg */
+#define Reg16   0x2		/* 16 bit reg */
+#define Reg32   0x4		/* 32 bit reg */
+#define Reg     (Reg8|Reg16|Reg32)    /* gen'l register */
+#define WordReg (Reg16|Reg32)	/* for push/pop operands */
+/* immediate */
+#define Imm8    0x8		/* 8 bit immediate */
+#define Imm8S	0x10		/* 8 bit immediate sign extended */
+#define Imm16   0x20		/* 16 bit immediate */
+#define Imm32   0x40		/* 32 bit immediate */
+#define Imm1    0x80    	/* 1 bit immediate */
+#define ImmUnknown Imm32	/* for unknown expressions */
+#define Imm     (Imm8|Imm8S|Imm16|Imm32)    /* gen'l immediate */
+/* memory */
+#define Disp8   0x200		/* 8 bit displacement (for jumps) */
+#define Disp16  0x400		/* 16 bit displacement */
+#define Disp32  0x800		/* 32 bit displacement */
+#define Disp    (Disp8|Disp16|Disp32) /* General displacement */
+#define DispUnknown Disp32	/* for unknown size displacements */
+#define Mem8    0x1000
+#define Mem16   0x2000
+#define Mem32   0x4000
+#define BaseIndex 0x8000
+#define Mem     (Disp|Mem8|Mem16|Mem32|BaseIndex) /* General memory */
+#define WordMem   (Mem16|Mem32|Disp|BaseIndex)
+#define ByteMem   (Mem8|Disp|BaseIndex)
+/* specials */
+#define InOutPortReg 0x10000	/* register to hold in/out port addr = dx */
+#define ShiftCount 0x20000	/* register to hold shift cound = cl */
+#define Control 0x40000		/* Control register */
+#define Debug   0x80000		/* Debug register */
+#define Test    0x100000		/* Test register */
+#define FloatReg 0x200000	/* Float register */
+#define FloatAcc 0x400000	/* Float stack top %st(0) */
+#define SReg2   0x800000		/* 2 bit segment register */
+#define SReg3   0x1000000		/* 3 bit segment register */
+#define Acc     0x2000000		/* Accumulator %al or %ax or %eax */
+#define ImplicitRegister (InOutPortReg|ShiftCount|Acc|FloatAcc)
+#define JumpAbsolute 0x4000000
+#define Abs8  0x08000000
+#define Abs16 0x10000000
+#define Abs32 0x20000000
+#define Abs (Abs8|Abs16|Abs32)
+
+#define Byte (Reg8|Imm8|Imm8S)
+#define Word (Reg16|Imm16)
+#define DWord (Reg32|Imm32)
+
+#define SMALLEST_DISP_TYPE(num) \
+    fits_in_signed_byte(num) ? (Disp8|Disp32|Abs8|Abs32) : (Disp32|Abs32)
+
+typedef struct {
+	/* instruction name sans width suffix ("mov" for movl insns) */
+	char *name;
+	
+	/* how many operands */
+	unsigned int operands;
+	
+	/* base_opcode is the fundamental opcode byte with a optional prefix(es). */
+	unsigned int base_opcode;
+	
+	/* extension_opcode is the 3 bit extension for group <n> insns.
+	   If this template has no extension opcode (the usual case) use None */
+	unsigned char extension_opcode;
+#define None 0xff /* If no extension_opcode is possible. */
+	
+	/* the bits in opcode_modifier are used to generate the final opcode from
+	   the base_opcode.  These bits also are used to detect alternate forms of
+	   the same instruction */
+	unsigned int opcode_modifier;
+	
+	/* opcode_modifier bits: */
+#define W        0x1	/* set if operands are words or dwords */
+#define D        0x2	/* D = 0 if Reg --> Regmem; D = 1 if Regmem --> Reg */
+	/* direction flag for floating insns:  MUST BE 0x400 */
+#define FloatD 0x400
+	/* shorthand */
+#define DW (D|W)
+#define ShortForm 0x10		/* register is in low 3 bits of opcode */
+#define ShortFormW 0x20		/* ShortForm and W bit is 0x8 */
+#define Seg2ShortForm 0x40	/* encoding of load segment reg insns */
+#define Seg3ShortForm 0x80	/* fs/gs segment register insns. */
+#define Jump 0x100		/* special case for jump insns. */
+#define JumpInterSegment 0x200	/* special case for intersegment leaps/calls */
+	/* 0x400 CANNOT BE USED since it's already used by FloatD above */
+#define DONT_USE 0x400
+#define NoModrm 0x800
+#define Modrm 0x1000
+#define imulKludge 0x2000
+#define JumpByte 0x4000
+#define JumpDword 0x8000
+#define ReverseRegRegmem 0x10000
+	
+	/* (opcode_modifier & COMES_IN_ALL_SIZES) is true if the
+	   instuction comes in byte, word, and dword sizes and is encoded into
+	   machine code in the canonical way. */
+#define COMES_IN_ALL_SIZES (W)
+	
+	/* (opcode_modifier & COMES_IN_BOTH_DIRECTIONS) indicates that the
+	   source and destination operands can be reversed by setting either
+	   the D (for integer insns) or the FloatD (for floating insns) bit
+	   in base_opcode. */
+#define COMES_IN_BOTH_DIRECTIONS (D|FloatD)
+	
+	/* operand_types[i] describes the type of operand i.  This is made
+	   by OR'ing together all of the possible type masks.  (e.g.
+	   'operand_types[i] = Reg|Imm' specifies that operand i can be
+	   either a register or an immediate operand */
+	unsigned int operand_types[3];
+} template;
+
+/*
+  'templates' is for grouping together 'template' structures for opcodes
+  of the same name.  This is only used for storing the insns in the grand
+  ole hash table of insns.
+  The templates themselves start at START and range up to (but not including)
+  END.
+  */
+typedef struct {
+	template *start;
+	template *end;
+} templates;
+
+/* these are for register name --> number & type hash lookup */
+typedef struct {
+	char *reg_name;
+	unsigned int reg_type;
+	unsigned int reg_num;
+} reg_entry;
+
+typedef struct {
+	char *seg_name;
+	unsigned int seg_prefix;
+} seg_entry;
+
+/* these are for prefix name --> prefix code hash lookup */
+typedef struct {
+	char *prefix_name;
+	unsigned char prefix_code;
+} prefix_entry;
+
+/* 386 operand encoding bytes:  see 386 book for details of this. */
+typedef struct {
+	unsigned regmem:3;	     /* codes register or memory operand */
+	unsigned reg:3;	     /* codes register operand (or extended opcode) */
+	unsigned mode:2;	     /* how to interpret regmem & reg */
+} modrm_byte;
+
+/* 386 opcode byte to code indirect addressing. */
+typedef struct {
+	unsigned base:3;
+	unsigned index:3;
+	unsigned scale:2;
+} base_index_byte;
+
+#endif /* TC_I386 */
+
+/* end of tc-i386.h */