Tue Feb 18 17:43:43 1997 Martin M. Hunt <hunt@pizza.cygnus.com>

	* Makefile.in: Added d30v object files.
	* configure: (bfd_d30v_arch) Rebuilt.
	* configure.in: (bfd_d30v_arch) Added new case.
	* d30v-dis.c: New file.
	* d30v-opc.c: New file.
	* disassemble.c (disassembler) Add entry for d30v.

1 files changed, 345 insertions, 0 deletions

diff --git a/opcodes/d30v-dis.c b/opcodes/d30v-dis.c
new file mode 100644
index 0000000..91262ad
--- /dev/null
+++ b/opcodes/d30v-dis.c
@@ -0,0 +1,345 @@
+/* Disassemble D30V instructions.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+
+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.  */
+
+#include <stdio.h>
+#include "opcode/d30v.h" 
+#include "dis-asm.h"
+
+#define PC_MASK 0xFFFFFFFF
+
+static int lookup_opcode PARAMS (( struct d30v_insn *insn, long num, int is_long ));
+static void print_insn PARAMS (( struct disassemble_info *info, bfd_vma memaddr, long long num, 
+				 struct d30v_insn *insn, int is_long ));
+static int extract_value PARAMS (( long long num, struct d30v_operand *oper, int is_long ));
+
+int 
+print_insn_d30v (memaddr, info)
+     bfd_vma memaddr;
+     struct disassemble_info *info;
+{
+  int status, i;
+  bfd_byte buffer[12];
+  unsigned long in1,in2;
+  struct d30v_insn insn;
+  long long num;
+
+  insn.form = (struct d30v_format *)NULL;
+
+  status = (*info->read_memory_func) (memaddr, buffer, 8, info);
+  if (status != 0)
+    {
+      (*info->memory_error_func) (status, memaddr, info);
+      return -1;
+    }
+  info->bytes_per_line = 8;
+  info->bytes_per_chunk = 4;
+  info->display_endian = BFD_ENDIAN_BIG;
+  in1 = bfd_getb32 (buffer);
+  in2 = bfd_getb32 (buffer+4);
+  
+  if (in1 & in2 & FM01)
+    {
+      /* LONG instruction */
+      if (!lookup_opcode(&insn, in1, 1))
+	{
+	  (*info->fprintf_func) (info->stream, ".long\t0x%x,0x%x",in1,in2);
+	  return 8;
+	}
+      num = (long long)in1 << 32 | in2;
+      print_insn(info, memaddr, num, &insn, 1);
+    }
+  else
+    {
+      num = in1;
+      if (!lookup_opcode(&insn, in1, 0))
+	(*info->fprintf_func) (info->stream, ".long\t0x%x",in1);
+      else
+	print_insn(info, memaddr, num, &insn, 0);
+      
+      switch ( ((in1>>31)<<1) | (in2>>31) )
+	{
+	case 0:
+	  (*info->fprintf_func) (info->stream, "\t||\t");   
+	  break;
+	case 1:
+	  (*info->fprintf_func) (info->stream, "\t->\t");   
+	  break;
+	case 2:
+	  (*info->fprintf_func) (info->stream, "\t<-\t");   
+	default:
+	  break;
+	}
+      
+      insn.form = (struct d30v_format *)NULL;
+      num = in2;
+      if (!lookup_opcode(&insn, in2, 0))
+	(*info->fprintf_func) (info->stream, ".long\t0x%x",in2);
+      else
+	print_insn(info, memaddr, num, &insn, 0);
+
+    }
+  return 8;
+}
+
+
+static int
+lookup_opcode (insn, num, is_long)
+     struct d30v_insn *insn;
+     long num;
+     int is_long;
+{
+  int i=0, index;
+  struct d30v_format *f;
+  struct d30v_opcode *op = (struct d30v_opcode *)d30v_opcode_table;
+  int op1 = (num >> 25) & 0x7;
+  int op2 = (num >> 20) & 0x1f;
+  int mod = (num >> 18) & 0x3;
+
+  /* find the opcode */
+  do {
+    if ((op->op1 == op1) && (op->op2 == op2))
+      break;
+    op++;
+  } while (op->name);
+
+  if (!op || !op->name)
+    return 0;
+
+  while (op->op1 == op1 && op->op2 == op2)
+    {
+      /* scan through all the formats for the opcode  */
+      while (index = op->format[i++])
+	{
+	  f = (struct d30v_format *)&d30v_format_table[index];
+	  while (f->form == index)
+	    {
+	      if ((!is_long || f->form >= LONG) && (f->modifier == mod))
+		{
+		  insn->form = f;
+		  break;
+		}
+	      f++;
+	    }
+	  if (insn->form)
+	    break;
+	}
+      if (insn->form)
+	break;
+      op++;
+      i=0;
+    }
+  if (insn->form == NULL)
+    return 0;
+
+  insn->op = op;
+  insn->ecc = (num >> 28) & 0x7;
+  return 1;
+}
+
+
+static void 
+print_insn ( info, memaddr, num, insn, is_long )
+     struct disassemble_info *info;
+     bfd_vma memaddr;
+     long long num;
+     struct d30v_insn *insn;
+     int is_long;
+{
+  char buffer[128];
+  int val, opnum, need_comma=0;
+  struct d30v_operand *oper;
+  int i, match, opind=0, need_paren=0, found_control=0;
+
+  (*info->fprintf_func) (info->stream, "%s",insn->op->name);
+
+  /* check for CMP or CMPU */
+  if (d30v_operand_table[insn->form->operands[0]].flags & OPERAND_NAME)
+    {
+      opind++;
+      val = extract_value(num,(struct d30v_operand *)&d30v_operand_table[insn->form->operands[0]],is_long);
+      (*info->fprintf_func) (info->stream, "%s",d30v_cc_names[val]);
+    }
+
+  if (insn->ecc)
+    (*info->fprintf_func) (info->stream, "/%s",d30v_ecc_names[insn->ecc]);
+
+  (*info->fprintf_func) (info->stream, "\t");
+
+  while (opnum = insn->form->operands[opind++])
+    {
+      oper = (struct d30v_operand *)&d30v_operand_table[opnum];
+
+      if (need_comma && oper->flags != OPERAND_PLUS && oper->flags != OPERAND_MINUS)
+	{
+	  need_comma=0;
+	  (*info->fprintf_func) (info->stream, ", ");
+	}
+
+      if (oper->flags == OPERAND_ATMINUS)
+	{
+	  (*info->fprintf_func) (info->stream, "@-");
+	  continue;
+	}
+      if (oper->flags == OPERAND_MINUS)
+	{
+	  (*info->fprintf_func) (info->stream, "-");   
+	  continue;
+	}
+      if (oper->flags == OPERAND_PLUS)
+	{
+	  (*info->fprintf_func) (info->stream, "+");   
+	  continue;
+	}
+      if (oper->flags == OPERAND_ATSIGN)
+	{
+	  (*info->fprintf_func) (info->stream, "@");   
+	  continue;
+	}
+      if (oper->flags == OPERAND_ATPAR)
+	{
+	  (*info->fprintf_func) (info->stream, "@(");   
+	  need_paren = 1;
+	  continue;
+	}
+
+      if (oper->flags == OPERAND_SPECIAL)
+	continue;
+
+      val = extract_value(num, oper, is_long);
+      
+      if (oper->flags & OPERAND_REG)
+	{
+	  match = 0;
+	  if (oper->flags & OPERAND_CONTROL)
+	    {
+	      struct d30v_operand *oper3 = 
+		(struct d30v_operand *)&d30v_operand_table[insn->form->operands[2]];	      
+	      int id = extract_value (num, oper3, is_long );
+	      found_control = 1;
+	      switch ( id )
+		{
+		case 0:
+		  val |= OPERAND_CONTROL;
+		  break;
+		case 1:
+		case 2:
+		  val = OPERAND_CONTROL + MAX_CONTROL_REG + id;
+		  break;
+		case 3:
+		  val |= OPERAND_FLAG;
+		  break;
+		default:
+		  fprintf(stderr,"illegal id (%d)\n",id);
+		}
+	    }
+	  else if (oper->flags & OPERAND_ACC)
+	    val |= OPERAND_ACC;
+	  else if (oper->flags & OPERAND_FLAG)
+	    val |= OPERAND_FLAG;
+	  for (i=0;i<reg_name_cnt();i++)
+	    {
+	      if (val == pre_defined_registers[i].value)
+		{
+		  if (pre_defined_registers[i].pname)
+		    (*info->fprintf_func) (info->stream, "%s",pre_defined_registers[i].pname);
+		  else
+		    (*info->fprintf_func) (info->stream, "%s",pre_defined_registers[i].name);
+		  match=1;
+		  break;
+		}
+	    }
+	  if (match==0)
+	    {
+	      /* this would only get executed if a register was not in the 
+		 register table */
+	      (*info->fprintf_func) (info->stream, "<unknown register %d>",val & 0x3F);	      
+	    }
+	}
+      else if (insn->op->reloc_flag == RELOC_PCREL)
+	{
+	  long max;
+	  int neg=0;
+	  max = (1 << (oper->bits - 1));
+	  if (val & max)
+	    {
+	      if (oper->bits == 32)
+		val = -val;
+	      else
+		val = -val & ((1 << oper->bits)-1);
+	      neg = 1;
+	    }
+	  if (neg)
+	    (*info->print_address_func) ((memaddr - val) & PC_MASK, info);
+	  else
+	    (*info->print_address_func) ((memaddr + val) & PC_MASK, info);
+	}
+      else if (insn->op->reloc_flag == RELOC_ABS)
+	{
+	  (*info->print_address_func) (val, info);
+	}
+      else
+	{
+	  if (oper->flags & OPERAND_SIGNED)
+	    {
+	      int max = (1 << (oper->bits - 1));
+	      if (val & max)
+		{
+		  val = -val & ((1 << oper->bits) - 1);
+		  (*info->fprintf_func) (info->stream, "-");
+		}
+	    }
+	  (*info->fprintf_func) (info->stream, "0x%x",val);
+	}
+      /* if there is another operand, then write a comma and space */
+      if (insn->form->operands[opind] && !(found_control && opind == 2))
+	need_comma = 1;
+    }
+  if (need_paren)
+    (*info->fprintf_func) (info->stream, ")");
+}
+
+
+
+static int
+extract_value (num, oper, is_long)
+     long long num;
+     struct d30v_operand *oper;
+     int is_long;
+{
+  int val;
+  int shift = 12 - oper->position;
+  int mask = (0xFFFFFFFF >> (32 - oper->bits));
+
+  if (is_long)
+    {
+      if (oper->bits == 32) 
+	{
+	  /* piece together 32-bit constant */
+	  val = num & 0x3FFFF | (num & 0xFF00000) >> 2 |
+	    (num & 0x3F00000000LL) >> 6;
+	}
+      else	
+	val = (num >> (32 + shift)) & mask;	
+    }
+  else
+    val = (num >> shift) & mask;
+
+  if (oper->flags & OPERAND_SHIFT)
+    val <<= 3;
+
+  return val;
+}