--- /dev/null
+/* Print instructions for the Motorola 88000, for GDB and GNU Binutils.
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1993
+ Free Software Foundation, Inc.
+ Contributed by Data General Corporation, November 1989.
+ Partially derived from an earlier printcmd.c.
+
+This file is part of GDB and the GNU Binutils.
+
+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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "dis-asm.h"
+#include "opcode/m88k.h"
+
+/* FIXME: Uses the internal bfd swapping routines. */
+#include "libbfd.h"
+
+INSTAB *hashtable[HASHVAL] = {0};
+
+static int
+m88kdis PARAMS ((bfd_vma, unsigned long, struct disassemble_info *));
+
+static void
+printop PARAMS ((struct disassemble_info *, OPSPEC *,
+ unsigned long, bfd_vma, int));
+
+static void
+init_disasm PARAMS ((void));
+
+static void
+install PARAMS ((INSTAB *instptr));
+
+/*
+* Disassemble an M88000 Instruction
+*
+*
+* This module decodes the instruction at memaddr.
+*
+* Revision History
+*
+* Revision 1.0 11/08/85 Creation date by Motorola
+* 05/11/89 R. Trawick adapted to GDB interface.
+* 07/12/93 Ian Lance Taylor updated to
+* binutils interface.
+*/
+
+int
+print_insn_m88k (memaddr, info)
+ bfd_vma memaddr;
+ struct disassemble_info *info;
+{
+ bfd_byte buffer[4];
+ int status;
+
+ /* Instruction addresses may have low two bits set. Clear them. */
+ memaddr &=~ (bfd_vma) 3;
+
+ status = (*info->read_memory_func) (memaddr, buffer, 4, info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, memaddr, info);
+ return -1;
+ }
+
+ return m88kdis (memaddr, _do_getb32 (buffer), info);
+}
+
+/*
+ * disassemble the instruction in 'instruction'.
+ * 'pc' should be the address of this instruction, it will
+ * be used to print the target address if this is a relative jump or call
+ * the disassembled instruction is written to 'info'.
+ * The function returns the length of this instruction in bytes.
+ */
+
+static int
+m88kdis (pc, instruction, info)
+ bfd_vma pc;
+ unsigned long instruction;
+ struct disassemble_info *info;
+{
+ static int ihashtab_initialized = 0;
+ unsigned int opcode;
+ INSTAB *entry_ptr;
+ int opmask;
+ int class;
+
+ if (! ihashtab_initialized)
+ init_disasm ();
+
+ /* create a the appropriate mask to isolate the opcode */
+ opmask = DEFMASK;
+ class = instruction & DEFMASK;
+ if ((class >= SFU0) && (class <= SFU7))
+ {
+ if (instruction < SFU1)
+ opmask = CTRLMASK;
+ else
+ opmask = SFUMASK;
+ }
+ else if (class == RRR)
+ opmask = RRRMASK;
+ else if (class == RRI10)
+ opmask = RRI10MASK;
+
+ /* isolate the opcode */
+ opcode = instruction & opmask;
+
+ /* search the hash table with the isolated opcode */
+ for (entry_ptr = hashtable[opcode % HASHVAL];
+ (entry_ptr != NULL) && (entry_ptr->opcode != opcode);
+ entry_ptr = entry_ptr->next)
+ ;
+
+ if (entry_ptr == NULL)
+ (*info->fprintf_func) (info->stream, "word\t%08x", instruction);
+ else
+ {
+ (*info->fprintf_func) (info->stream, "%s ", entry_ptr->mnemonic);
+ printop (info, &(entry_ptr->op1), instruction, pc, 1);
+ printop (info, &(entry_ptr->op2), instruction, pc, 0);
+ printop (info, &(entry_ptr->op3), instruction, pc, 0);
+ }
+
+ return 4;
+}
+\f
+/*
+* Decode an Operand of an Instruction
+*
+* Functional Description
+*
+* This module formats and writes an operand of an instruction to info
+* based on the operand specification. When the first flag is set this
+* is the first operand of an instruction. Undefined operand types
+* cause a <dis error> message.
+*
+* Parameters
+* disassemble_info where the operand may be printed
+* OPSPEC *opptr Pointer to an operand specification
+* UINT inst Instruction from which operand is extracted
+* UINT pc PC of instruction; used for pc-relative disp.
+* int first Flag which if nonzero indicates the first
+* operand of an instruction
+*
+* Output
+*
+* The operand specified is extracted from the instruction and is
+* written to buf in the format specified. The operand is preceded
+* by a comma if it is not the first operand of an instruction and it
+* is not a register indirect form. Registers are preceded by 'r' and
+* hex values by '0x'.
+*
+* Revision History
+*
+* Revision 1.0 11/08/85 Creation date
+*/
+
+static void
+printop (info, opptr, inst, pc, first)
+ struct disassemble_info *info;
+ OPSPEC *opptr;
+ unsigned long inst;
+ bfd_vma pc;
+ int first;
+{
+ int extracted_field;
+ char *cond_mask_sym;
+
+ if (opptr->width == 0)
+ return;
+
+ if (! first)
+ {
+ switch (opptr->type)
+ {
+ case REGSC:
+ case CONT:
+ break;
+ default:
+ (*info->fprintf_func) (info->stream, ",");
+ break;
+ }
+ }
+
+ switch (opptr->type)
+ {
+ case CRREG:
+ (*info->fprintf_func) (info->stream, "cr%d",
+ UEXT (inst, opptr->offset, opptr->width));
+ break;
+
+ case FCRREG:
+ (*info->fprintf_func) (info->stream, "fcr%d",
+ UEXT (inst, opptr->offset, opptr->width));
+ break;
+
+ case REGSC:
+ (*info->fprintf_func) (info->stream, "[r%d]",
+ UEXT (inst, opptr->offset, opptr->width));
+ break;
+
+ case REG:
+ (*info->fprintf_func) (info->stream, "r%d",
+ UEXT (inst, opptr->offset, opptr->width));
+ break;
+
+ case HEX:
+ extracted_field = UEXT (inst, opptr->offset, opptr->width);
+ if (extracted_field == 0)
+ (*info->fprintf_func) (info->stream, "0");
+ else
+ (*info->fprintf_func) (info->stream, "0x%02x", extracted_field);
+ break;
+
+ case CONDMASK:
+ extracted_field = UEXT (inst, opptr->offset, opptr->width);
+ switch (extracted_field & 0x0f)
+ {
+ case 0x1: cond_mask_sym = "gt0"; break;
+ case 0x2: cond_mask_sym = "eq0"; break;
+ case 0x3: cond_mask_sym = "ge0"; break;
+ case 0xc: cond_mask_sym = "lt0"; break;
+ case 0xd: cond_mask_sym = "ne0"; break;
+ case 0xe: cond_mask_sym = "le0"; break;
+ default: cond_mask_sym = NULL; break;
+ }
+ if (cond_mask_sym != NULL)
+ (*info->fprintf_func) (info->stream, "%s", cond_mask_sym);
+ else
+ (*info->fprintf_func) (info->stream, "%x", extracted_field);
+ break;
+
+ case PCREL:
+ (*info->print_address_func)
+ (pc + (4 * (SEXT (inst, opptr->offset, opptr->width))),
+ info);
+ break;
+
+ case CONT:
+ (*info->fprintf_func) (info->stream, "%d,r%d",
+ UEXT (inst, opptr->offset, 5),
+ UEXT (inst, (opptr->offset) + 5, 5));
+ break;
+
+ case BF:
+ (*info->fprintf_func) (info->stream, "%d<%d>",
+ UEXT (inst, (opptr->offset) + 5, 5),
+ UEXT (inst, opptr->offset, 5));
+ break;
+
+ default:
+ (*info->fprintf_func) (info->stream, "# <dis error: %08x>", inst);
+ }
+}
+
+/*
+* Initialize the Disassembler Instruction Table
+*
+* Initialize the hash table and instruction table for the disassembler.
+* This should be called once before the first call to disasm().
+*
+* Parameters
+*
+* Output
+*
+* If the debug option is selected, certain statistics about the hashing
+* distribution are written to stdout.
+*
+* Revision History
+*
+* Revision 1.0 11/08/85 Creation date
+*/
+
+static void
+init_disasm ()
+{
+ int i, size;
+
+ for (i = 0; i < HASHVAL; i++)
+ hashtable[i] = NULL;
+
+ size = sizeof (instructions) / sizeof (INSTAB);
+ for (i = 0; i < size; i++)
+ install (&instructions[i]);
+}
+
+/*
+* Insert an instruction into the disassembler table by hashing the
+* opcode and inserting it into the linked list for that hash value.
+*
+* Parameters
+*
+* INSTAB *instptr Pointer to the entry in the instruction table
+* to be installed
+*
+* Revision 1.0 11/08/85 Creation date
+* 05/11/89 R. TRAWICK ADAPTED FROM MOTOROLA
+*/
+
+static void
+install (instptr)
+ INSTAB *instptr;
+{
+ unsigned int i;
+
+ i = (instptr->opcode) % HASHVAL;
+ instptr->next = hashtable[i];
+ hashtable[i] = instptr;
+}
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