CRIS disassembler, originally from binutils, by Edgar E. Iglesias.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3356 c046a42c-6fe2-441c-8c8c-71466251a162

target-cris/opcode-cris.h

+/* cris.h -- Header file for CRIS opcode and register tables.
+   Copyright (C) 2000, 2001, 2004 Free Software Foundation, Inc.
+   Contributed by Axis Communications AB, Lund, Sweden.
+   Originally written for GAS 1.38.1 by Mikael Asker.
+   Updated, BFDized and GNUified by Hans-Peter Nilsson.
+
+This file is part of GAS, GDB and the GNU binutils.
+
+GAS, GDB, and GNU binutils 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, GDB, and GNU binutils are distributed in the hope that they 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 this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef __CRIS_H_INCLUDED_
+#define __CRIS_H_INCLUDED_
+
+#if !defined(__STDC__) && !defined(const)
+#define const
+#endif
+
+
+/* Registers.  */
+#define MAX_REG (15)
+#define REG_SP (14)
+#define REG_PC (15)
+
+/* CPU version control of disassembly and assembly of instructions.
+   May affect how the instruction is assembled, at least the size of
+   immediate operands.  */
+enum cris_insn_version_usage
+{
+  /* Any version.  */
+  cris_ver_version_all=0,
+
+  /* Indeterminate (intended for disassembly only, or obsolete).  */
+  cris_ver_warning,
+
+  /* Only for v0..3 (Etrax 1..4).  */
+  cris_ver_v0_3,
+
+  /* Only for v3 or higher (ETRAX 4 and beyond).  */
+  cris_ver_v3p,
+
+  /* Only for v8 (Etrax 100).  */
+  cris_ver_v8,
+
+  /* Only for v8 or higher (ETRAX 100, ETRAX 100 LX).  */
+  cris_ver_v8p,
+
+  /* Only for v0..10.  FIXME: Not sure what to do with this.  */
+  cris_ver_sim_v0_10,
+
+  /* Only for v0..10.  */
+  cris_ver_v0_10,
+
+  /* Only for v3..10.  (ETRAX 4, ETRAX 100 and ETRAX 100 LX).  */
+  cris_ver_v3_10,
+
+  /* Only for v8..10 (ETRAX 100 and ETRAX 100 LX).  */
+  cris_ver_v8_10,
+
+  /* Only for v10 (ETRAX 100 LX) and same series.  */
+  cris_ver_v10,
+
+  /* Only for v10 (ETRAX 100 LX) and same series.  */
+  cris_ver_v10p,
+
+  /* Only for v32 or higher (codename GUINNESS).
+     Of course some or all these of may change to cris_ver_v32p if/when
+     there's a new revision. */
+  cris_ver_v32p
+};
+
+
+/* Special registers.  */
+struct cris_spec_reg
+{
+  const char *const name;
+  unsigned int number;
+
+  /* The size of the register.  */
+  unsigned int reg_size;
+
+  /* What CPU version the special register of that name is implemented
+     in.  If cris_ver_warning, emit an unimplemented-warning.  */
+  enum cris_insn_version_usage applicable_version;
+
+  /* There might be a specific warning for using a special register
+     here.  */
+  const char *const warning;
+};
+extern const struct cris_spec_reg cris_spec_regs[];
+
+
+/* Support registers (kind of special too, but not named as such).  */
+struct cris_support_reg
+{
+  const char *const name;
+  unsigned int number;
+};
+extern const struct cris_support_reg cris_support_regs[];
+
+struct cris_cond15
+{
+  /* The name of the condition.  */
+  const char *const name;
+
+  /* What CPU version this condition name applies to.  */
+  enum cris_insn_version_usage applicable_version;
+};
+extern const struct cris_cond15 cris_conds15[];
+
+/* Opcode-dependent constants.  */
+#define AUTOINCR_BIT (0x04)
+
+/* Prefixes.  */
+#define BDAP_QUICK_OPCODE (0x0100)
+#define BDAP_QUICK_Z_BITS (0x0e00)
+
+#define BIAP_OPCODE	  (0x0540)
+#define BIAP_Z_BITS	  (0x0a80)
+
+#define DIP_OPCODE	  (0x0970)
+#define DIP_Z_BITS	  (0xf280)
+
+#define BDAP_INDIR_LOW	  (0x40)
+#define BDAP_INDIR_LOW_Z  (0x80)
+#define BDAP_INDIR_HIGH	  (0x09)
+#define BDAP_INDIR_HIGH_Z (0x02)
+
+#define BDAP_INDIR_OPCODE (BDAP_INDIR_HIGH * 0x0100 + BDAP_INDIR_LOW)
+#define BDAP_INDIR_Z_BITS (BDAP_INDIR_HIGH_Z * 0x100 + BDAP_INDIR_LOW_Z)
+#define BDAP_PC_LOW	  (BDAP_INDIR_LOW + REG_PC)
+#define BDAP_INCR_HIGH	  (BDAP_INDIR_HIGH + AUTOINCR_BIT)
+
+/* No prefix must have this code for its "match" bits in the
+   opcode-table.  "BCC .+2" will do nicely.  */
+#define NO_CRIS_PREFIX 0
+
+/* Definitions for condition codes.  */
+#define CC_CC  0x0
+#define CC_HS  0x0
+#define CC_CS  0x1
+#define CC_LO  0x1
+#define CC_NE  0x2
+#define CC_EQ  0x3
+#define CC_VC  0x4
+#define CC_VS  0x5
+#define CC_PL  0x6
+#define CC_MI  0x7
+#define CC_LS  0x8
+#define CC_HI  0x9
+#define CC_GE  0xA
+#define CC_LT  0xB
+#define CC_GT  0xC
+#define CC_LE  0xD
+#define CC_A   0xE
+#define CC_EXT 0xF
+
+/* A table of strings "cc", "cs"... indexed with condition code
+   values as above.  */
+extern const char *const cris_cc_strings[];
+
+/* Bcc quick.  */
+#define BRANCH_QUICK_LOW  (0)
+#define BRANCH_QUICK_HIGH (0)
+#define BRANCH_QUICK_OPCODE (BRANCH_QUICK_HIGH * 0x0100 + BRANCH_QUICK_LOW)
+#define BRANCH_QUICK_Z_BITS (0x0F00)
+
+/* BA quick.  */
+#define BA_QUICK_HIGH (BRANCH_QUICK_HIGH + CC_A * 0x10)
+#define BA_QUICK_OPCODE (BA_QUICK_HIGH * 0x100 + BRANCH_QUICK_LOW)
+
+/* Bcc [PC+].  */
+#define BRANCH_PC_LOW	 (0xFF)
+#define BRANCH_INCR_HIGH (0x0D)
+#define BA_PC_INCR_OPCODE \
+ ((BRANCH_INCR_HIGH + CC_A * 0x10) * 0x0100 + BRANCH_PC_LOW)
+
+/* Jump.  */
+/* Note that old versions generated special register 8 (in high bits)
+   and not-that-old versions recognized it as a jump-instruction.
+   That opcode now belongs to JUMPU.  */
+#define JUMP_INDIR_OPCODE (0x0930)
+#define JUMP_INDIR_Z_BITS (0xf2c0)
+#define JUMP_PC_INCR_OPCODE \
+ (JUMP_INDIR_OPCODE + AUTOINCR_BIT * 0x0100 + REG_PC)
+
+#define MOVE_M_TO_PREG_OPCODE 0x0a30
+#define MOVE_M_TO_PREG_ZBITS 0x01c0
+
+/* BDAP.D N,PC.  */
+#define MOVE_PC_INCR_OPCODE_PREFIX \
+ (((BDAP_INCR_HIGH | (REG_PC << 4)) << 8) | BDAP_PC_LOW | (2 << 4))
+#define MOVE_PC_INCR_OPCODE_SUFFIX \
+ (MOVE_M_TO_PREG_OPCODE | REG_PC | (AUTOINCR_BIT << 8))
+
+#define JUMP_PC_INCR_OPCODE_V32 (0x0DBF)
+
+/* BA DWORD (V32).  */
+#define BA_DWORD_OPCODE (0x0EBF)
+
+/* Nop.  */
+#define NOP_OPCODE (0x050F)
+#define NOP_Z_BITS (0xFFFF ^ NOP_OPCODE)
+
+#define NOP_OPCODE_V32 (0x05B0)
+#define NOP_Z_BITS_V32 (0xFFFF ^ NOP_OPCODE_V32)
+
+/* For the compatibility mode, let's use "MOVE R0,P0".  Doesn't affect
+   registers or flags.  Unfortunately shuts off interrupts for one cycle
+   for < v32, but there doesn't seem to be any alternative without that
+   effect.  */
+#define NOP_OPCODE_COMMON (0x630)
+#define NOP_OPCODE_ZBITS_COMMON (0xffff & ~NOP_OPCODE_COMMON)
+
+/* LAPC.D  */
+#define LAPC_DWORD_OPCODE (0x0D7F)
+#define LAPC_DWORD_Z_BITS (0x0fff & ~LAPC_DWORD_OPCODE)
+
+/* Structure of an opcode table entry.  */
+enum cris_imm_oprnd_size_type
+{
+  /* No size is applicable.  */
+  SIZE_NONE,
+
+  /* Always 32 bits.  */
+  SIZE_FIX_32,
+
+  /* Indicated by size of special register.  */
+  SIZE_SPEC_REG,
+
+  /* Indicated by size field, signed.  */
+  SIZE_FIELD_SIGNED,
+
+  /* Indicated by size field, unsigned.  */
+  SIZE_FIELD_UNSIGNED,
+
+  /* Indicated by size field, no sign implied.  */
+  SIZE_FIELD
+};
+
+/* For GDB.  FIXME: Is this the best way to handle opcode
+   interpretation?  */
+enum cris_op_type
+{
+  cris_not_implemented_op = 0,
+  cris_abs_op,
+  cris_addi_op,
+  cris_asr_op,
+  cris_asrq_op,
+  cris_ax_ei_setf_op,
+  cris_bdap_prefix,
+  cris_biap_prefix,
+  cris_break_op,
+  cris_btst_nop_op,
+  cris_clearf_di_op,
+  cris_dip_prefix,
+  cris_dstep_logshift_mstep_neg_not_op,
+  cris_eight_bit_offset_branch_op,
+  cris_move_mem_to_reg_movem_op,
+  cris_move_reg_to_mem_movem_op,
+  cris_move_to_preg_op,
+  cris_muls_op,
+  cris_mulu_op,
+  cris_none_reg_mode_add_sub_cmp_and_or_move_op,
+  cris_none_reg_mode_clear_test_op,
+  cris_none_reg_mode_jump_op,
+  cris_none_reg_mode_move_from_preg_op,
+  cris_quick_mode_add_sub_op,
+  cris_quick_mode_and_cmp_move_or_op,
+  cris_quick_mode_bdap_prefix,
+  cris_reg_mode_add_sub_cmp_and_or_move_op,
+  cris_reg_mode_clear_op,
+  cris_reg_mode_jump_op,
+  cris_reg_mode_move_from_preg_op,
+  cris_reg_mode_test_op,
+  cris_scc_op,
+  cris_sixteen_bit_offset_branch_op,
+  cris_three_operand_add_sub_cmp_and_or_op,
+  cris_three_operand_bound_op,
+  cris_two_operand_bound_op,
+  cris_xor_op
+};
+
+struct cris_opcode
+{
+  /* The name of the insn.  */
+  const char *name;
+
+  /* Bits that must be 1 for a match.  */
+  unsigned int match;
+
+  /* Bits that must be 0 for a match.  */
+  unsigned int lose;
+
+  /* See the table in "opcodes/cris-opc.c".  */
+  const char *args;
+
+  /* Nonzero if this is a delayed branch instruction.  */
+  char delayed;
+
+  /* Size of immediate operands.  */
+  enum cris_imm_oprnd_size_type imm_oprnd_size;
+
+  /* Indicates which version this insn was first implemented in.  */
+  enum cris_insn_version_usage applicable_version;
+
+  /* What kind of operation this is.  */
+  enum cris_op_type op;
+};
+extern const struct cris_opcode cris_opcodes[];
+
+
+/* These macros are for the target-specific flags in disassemble_info
+   used at disassembly.  */
+
+/* This insn accesses memory.  This flag is more trustworthy than
+   checking insn_type for "dis_dref" which does not work for
+   e.g. "JSR [foo]".  */
+#define CRIS_DIS_FLAG_MEMREF (1 << 0)
+
+/* The "target" field holds a register number.  */
+#define CRIS_DIS_FLAG_MEM_TARGET_IS_REG (1 << 1)
+
+/* The "target2" field holds a register number; add it to "target".  */
+#define CRIS_DIS_FLAG_MEM_TARGET2_IS_REG (1 << 2)
+
+/* Yet another add-on: the register in "target2" must be multiplied
+   by 2 before adding to "target".  */
+#define CRIS_DIS_FLAG_MEM_TARGET2_MULT2 (1 << 3)
+
+/* Yet another add-on: the register in "target2" must be multiplied
+   by 4 (mutually exclusive with .._MULT2).  */
+#define CRIS_DIS_FLAG_MEM_TARGET2_MULT4 (1 << 4)
+
+/* The register in "target2" is an indirect memory reference (of the
+   register there), add to "target".  Assumed size is dword (mutually
+   exclusive with .._MULT[24]).  */
+#define CRIS_DIS_FLAG_MEM_TARGET2_MEM (1 << 5)
+
+/* Add-on to CRIS_DIS_FLAG_MEM_TARGET2_MEM; the memory access is "byte";
+   sign-extended before adding to "target".  */
+#define CRIS_DIS_FLAG_MEM_TARGET2_MEM_BYTE (1 << 6)
+
+/* Add-on to CRIS_DIS_FLAG_MEM_TARGET2_MEM; the memory access is "word";
+   sign-extended before adding to "target".  */
+#define CRIS_DIS_FLAG_MEM_TARGET2_MEM_WORD (1 << 7)
+
+#endif /* __CRIS_H_INCLUDED_ */
+
+/*
+ * Local variables:
+ * eval: (c-set-style "gnu")
+ * indent-tabs-mode: t
+ * End:
+ */