Add support for OpenRISC 32-bit embedded processor

1 files changed, 188 insertions, 0 deletions

diff --git a/include/opcode/or32.h b/include/opcode/or32.h
new file mode 100644
index 0000000..05c5326
--- /dev/null
+++ b/include/opcode/or32.h
@@ -0,0 +1,188 @@
+/* Table of opcodes for the OpenRISC 1000 ISA.
+   Copyright 2002 Free Software Foundation, Inc.
+   Contributed by Damjan Lampret (lampret@opencores.org).
+   
+   This file is part of or1k_gen_isa, or1ksim, GDB and GAS.
+
+   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
+   (at your option) any later version.
+
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* We treat all letters the same in encode/decode routines so
+   we need to assign some characteristics to them like signess etc.  */
+
+#ifndef OR32_H_ISA
+#define OR32_H_ISA
+
+#define NUM_UNSIGNED (0)
+#define NUM_SIGNED (1)
+
+#ifndef PARAMS
+#define PARAMS(x) x
+#endif
+
+#ifndef CONST
+#define CONST const
+#endif
+
+#define MAX_GPRS 32
+#define PAGE_SIZE 4096
+#undef __HALF_WORD_INSN__
+
+#define OPERAND_DELIM (',')
+
+#define OR32_IF_DELAY (1)
+#define OR32_W_FLAG   (2)
+#define OR32_R_FLAG   (4)
+
+struct or32_letter
+{
+  char letter;
+  int  sign;
+  /* int  reloc; relocation per letter ??  */
+};
+
+/* Main instruction specification array.  */
+struct or32_opcode
+{
+  /* Name of the instruction.  */
+  char *name;
+
+  /* A string of characters which describe the operands.
+     Valid characters are:
+     ,() Itself.  Characters appears in the assembly code.
+     rA	 Register operand.
+     rB  Register operand.
+     rD  Register operand.
+     I	 An immediate operand, range -32768 to 32767.
+     J	 An immediate operand, range . (unused)
+     K	 An immediate operand, range 0 to 65535.
+     L	 An immediate operand, range 0 to 63.
+     M	 An immediate operand, range . (unused)
+     N	 An immediate operand, range -33554432 to 33554431.
+     O	 An immediate operand, range . (unused).  */
+  char *args;
+  
+  /* Opcode and operand encoding.  */
+  char *encoding;
+  void (*exec) PARAMS ((void));
+  unsigned int flags;
+};
+
+#define OPTYPE_LAST (0x80000000)
+#define OPTYPE_OP   (0x40000000)
+#define OPTYPE_REG  (0x20000000)
+#define OPTYPE_SIG  (0x10000000)
+#define OPTYPE_DIS  (0x08000000)
+#define OPTYPE_DST  (0x04000000)
+#define OPTYPE_SBIT (0x00001F00)
+#define OPTYPE_SHR  (0x0000001F)
+#define OPTYPE_SBIT_SHR (8)
+
+/* MM: Data how to decode operands.  */
+extern struct insn_op_struct
+{
+  unsigned long type;
+  unsigned long data;
+} **op_start;
+
+#ifdef HAS_EXECUTION
+extern void l_invalid PARAMS ((void));
+extern void l_sfne    PARAMS ((void));
+extern void l_bf      PARAMS ((void));
+extern void l_add     PARAMS ((void));
+extern void l_sw      PARAMS ((void));
+extern void l_sb      PARAMS ((void));
+extern void l_sh      PARAMS ((void));
+extern void l_lwz     PARAMS ((void));
+extern void l_lbs     PARAMS ((void));
+extern void l_lbz     PARAMS ((void));
+extern void l_lhs     PARAMS ((void));
+extern void l_lhz     PARAMS ((void));
+extern void l_movhi   PARAMS ((void));
+extern void l_and     PARAMS ((void));
+extern void l_or      PARAMS ((void));
+extern void l_xor     PARAMS ((void));
+extern void l_sub     PARAMS ((void));
+extern void l_mul     PARAMS ((void));
+extern void l_div     PARAMS ((void));
+extern void l_divu    PARAMS ((void));
+extern void l_sll     PARAMS ((void));
+extern void l_sra     PARAMS ((void));
+extern void l_srl     PARAMS ((void));
+extern void l_j       PARAMS ((void));
+extern void l_jal     PARAMS ((void));
+extern void l_jalr    PARAMS ((void));
+extern void l_jr      PARAMS ((void));
+extern void l_rfe     PARAMS ((void));
+extern void l_nop     PARAMS ((void));
+extern void l_bnf     PARAMS ((void));
+extern void l_sfeq    PARAMS ((void));
+extern void l_sfgts   PARAMS ((void));
+extern void l_sfges   PARAMS ((void));
+extern void l_sflts   PARAMS ((void));
+extern void l_sfles   PARAMS ((void));
+extern void l_sfgtu   PARAMS ((void));
+extern void l_sfgeu   PARAMS ((void));
+extern void l_sfltu   PARAMS ((void));
+extern void l_sfleu   PARAMS ((void));
+extern void l_mtspr   PARAMS ((void));
+extern void l_mfspr   PARAMS ((void));
+extern void l_sys     PARAMS ((void));
+extern void l_trap    PARAMS ((void)); /* CZ 21/06/01.  */
+extern void l_macrc   PARAMS ((void));
+extern void l_mac     PARAMS ((void));
+extern void l_msb     PARAMS ((void));
+extern void l_invalid PARAMS ((void));
+extern void l_cust1   PARAMS ((void));
+extern void l_cust2   PARAMS ((void));
+extern void l_cust3   PARAMS ((void));
+extern void l_cust4   PARAMS ((void));
+#endif
+extern void l_none    PARAMS ((void));
+
+extern const struct or32_letter or32_letters[];
+
+extern const struct  or32_opcode or32_opcodes[];
+
+extern const unsigned int or32_num_opcodes;
+
+/* Calculates instruction length in bytes.  Always 4 for OR32.  */
+extern int insn_len PARAMS ((int));
+
+/* Is individual insn's operand signed or unsigned?  */
+extern int letter_signed PARAMS ((char));
+
+/* Number of letters in the individual lettered operand.  */
+extern int letter_range PARAMS ((char));
+
+/* MM: Returns index of given instruction name.  */
+extern int insn_index PARAMS ((char *));
+
+/* MM: Returns instruction name from index.  */
+extern const char *insn_name PARAMS ((int));
+
+/* MM: Constructs new FSM, based on or32_opcodes.  */ 
+extern void build_automata PARAMS ((void));
+
+/* MM: Destructs FSM.  */ 
+extern void destruct_automata PARAMS ((void));
+
+/* MM: Decodes instruction using FSM.  Call build_automata first.  */
+extern int insn_decode PARAMS ((unsigned int));
+
+/* Disassemble one instruction from insn to disassemble.
+   Return the size of the instruction.  */
+int disassemble_insn PARAMS ((unsigned long));
+
+#endif