/* opcode/i386.h -- Intel 80386 opcode macros
Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler, and GDB, the GNU Debugger.
The affected opcode map is dceX, dcfX, deeX, defX. */
+#ifndef OPCODE_I386_H
+#define OPCODE_I386_H
+
#ifndef SYSV386_COMPAT
/* Set non-zero for broken, compatible instructions. Set to zero for
non-broken opcodes at your peril. gcc generates SystemV/386
/* The opcode for the fwait instruction, which disassembler treats as a
prefix when it can. */
#define FWAIT_OPCODE 0x9b
+
+/* Instruction prefixes.
+ NOTE: For certain SSE* instructions, 0x66,0xf2,0xf3 are treated as
+ part of the opcode. Other prefixes may still appear between them
+ and the 0x0f part of the opcode. */
#define ADDR_PREFIX_OPCODE 0x67
#define DATA_PREFIX_OPCODE 0x66
#define LOCK_PREFIX_OPCODE 0xf0
#define NOP_OPCODE (char) 0x90
/* register numbers */
-#define EBP_REG_NUM 5
+#define EAX_REG_NUM 0
+#define ECX_REG_NUM 1
+#define EDX_REG_NUM 2
+#define EBX_REG_NUM 3
#define ESP_REG_NUM 4
+#define EBP_REG_NUM 5
+#define ESI_REG_NUM 6
+#define EDI_REG_NUM 7
/* modrm_byte.regmem for twobyte escape */
#define ESCAPE_TO_TWO_BYTE_ADDRESSING ESP_REG_NUM
#define REGMEM_FIELD_HAS_REG 0x3/* always = 0x3 */
#define REGMEM_FIELD_HAS_MEM (~REGMEM_FIELD_HAS_REG)
+/* Extract fields from the mod/rm byte. */
+#define MODRM_MOD_FIELD(modrm) (((modrm) >> 6) & 3)
+#define MODRM_REG_FIELD(modrm) (((modrm) >> 3) & 7)
+#define MODRM_RM_FIELD(modrm) (((modrm) >> 0) & 7)
+
+/* Extract fields from the sib byte. */
+#define SIB_SCALE_FIELD(sib) (((sib) >> 6) & 3)
+#define SIB_INDEX_FIELD(sib) (((sib) >> 3) & 7)
+#define SIB_BASE_FIELD(sib) (((sib) >> 0) & 7)
+
/* x86-64 extension prefix. */
#define REX_OPCODE 0x40
+/* Non-zero if OPCODE is the rex prefix. */
+#define REX_PREFIX_P(opcode) (((opcode) & 0xf0) == REX_OPCODE)
+
/* Indicates 64 bit operand size. */
#define REX_W 8
/* High extension to reg field of modrm byte. */
#define REX_B 1
/* max operands per insn */
-#define MAX_OPERANDS 4
+#define MAX_OPERANDS 5
/* max immediates per insn (lcall, ljmp, insertq, extrq) */
#define MAX_IMMEDIATE_OPERANDS 2
#define MAX_MEMORY_OPERANDS 2
/* max size of insn mnemonics. */
-#define MAX_MNEM_SIZE 16
+#define MAX_MNEM_SIZE 20
/* max size of register name in insn mnemonics. */
#define MAX_REG_NAME_SIZE 8
+
+#endif /* OPCODE_I386_H */