x86/Intel: drop pointless special casing of LxS

[deliverable/binutils-gdb.git] / include / opcode / i386.h

diff --git a/include/opcode/i386.h b/include/opcode/i386.h
index f59eeeaff3837ee0cbef07451ee6bf893aeb7de0..4f7836c2a1ef1dd05b644d4c024110bc9cf80c26 100644 (file)
--- a/include/opcode/i386.h
+++ b/include/opcode/i386.h
@@ -1,13 +1,11 @@
 /* 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
-   Free Software Foundation, Inc.
+   Copyright (C) 1989-2019 Free Software Foundation, Inc.
 
    This file is part of GAS, the GNU Assembler, and GDB, the GNU Debugger.
 
    This program 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 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -17,7 +15,8 @@
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
 
 /* The SystemV/386 SVR3.2 assembler, and probably all AT&T derived
    ix86 Unix assemblers, generate floating point instructions with
@@ -35,27 +34,30 @@
 
    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
    compatible instructions.  */
 #define SYSV386_COMPAT 1
 #endif
-#ifndef OLDGCC_COMPAT
-/* Set non-zero to cater for old (<= 2.8.1) versions of gcc that could
-   generate nonsense fsubp, fsubrp, fdivp and fdivrp with operands
-   reversed.  */
-#define OLDGCC_COMPAT SYSV386_COMPAT
-#endif
 
 #define MOV_AX_DISP32 0xa0
 #define POP_SEG_SHORT 0x07
+#define POP_SEG386_SHORT 0xfa1
 #define JUMP_PC_RELATIVE 0xeb
 #define INT_OPCODE  0xcd
 #define INT3_OPCODE 0xcc
 /* 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
@@ -67,13 +69,23 @@
 #define SS_PREFIX_OPCODE 0x36
 #define REPNE_PREFIX_OPCODE 0xf2
 #define REPE_PREFIX_OPCODE  0xf3
+#define XACQUIRE_PREFIX_OPCODE 0xf2
+#define XRELEASE_PREFIX_OPCODE 0xf3
+#define BND_PREFIX_OPCODE 0xf2
+#define NOTRACK_PREFIX_OPCODE 0x3e
 
 #define TWO_BYTE_OPCODE_ESCAPE 0x0f
 #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
@@ -87,9 +99,22 @@
 #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.  */
@@ -113,3 +138,5 @@
 
 /* max size of register name in insn mnemonics.  */
 #define MAX_REG_NAME_SIZE 8
+
+#endif /* OPCODE_I386_H */