z8k fixes

1 files changed, 59 insertions, 20 deletions

diff --git a/opcodes/z8k-dis.c b/opcodes/z8k-dis.c
index 8259500..77c2495 100644
--- a/opcodes/z8k-dis.c
+++ b/opcodes/z8k-dis.c
@@ -125,11 +125,24 @@ static char *codes[16] =
   "nc/uge"
 };
 
+static char *ctrl_names[8] =
+{
+  "<invld>",
+  "flags",
+  "fcw",
+  "refresh",
+  "psapseg",
+  "psapoff",
+  "nspseg",
+  "nspoff"
+};
+
+static int seg_length;
 int z8k_lookup_instr PARAMS ((unsigned char *, disassemble_info *));
 static void output_instr
   PARAMS ((instr_data_s *, unsigned long, disassemble_info *));
 static void unpack_instr PARAMS ((instr_data_s *, int, disassemble_info *));
-static void unparse_instr PARAMS ((instr_data_s *));
+static void unparse_instr PARAMS ((instr_data_s *,int));
 
 static int
 print_insn_z8k (addr, info, is_segmented)
@@ -150,9 +163,9 @@ print_insn_z8k (addr, info, is_segmented)
   if (instr_data.tabl_index > 0)
     {
       unpack_instr (&instr_data, is_segmented, info);
-      unparse_instr (&instr_data);
+      unparse_instr (&instr_data, is_segmented);
       output_instr (&instr_data, addr, info);
-      return z8k_table[instr_data.tabl_index].length;
+      return z8k_table[instr_data.tabl_index].length + seg_length;
     }
   else
     {
@@ -275,7 +288,7 @@ output_instr (instr_data, addr, info)
 
   strcpy (out_str, "\t");
 
-  loop_limit = z8k_table[instr_data->tabl_index].length * 2;
+  loop_limit = (z8k_table[instr_data->tabl_index].length + seg_length) * 2;
   FETCH_DATA (info, loop_limit);
   for (loop = 0; loop < loop_limit; loop++)
     {
@@ -302,16 +315,18 @@ unpack_instr (instr_data, is_segmented, info)
   int nibl_count, loop;
   unsigned short instr_nibl, instr_byte, instr_word;
   long instr_long;
-  unsigned short tabl_datum, datum_class, datum_value;
+  unsigned int tabl_datum, datum_class;
+  unsigned short datum_value;
 
   nibl_count = 0;
   loop = 0;
+  seg_length = 0;
   while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
     {
       FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
       instr_nibl = instr_data->nibbles[nibl_count];
-      instr_byte = instr_data->bytes[nibl_count];
-      instr_word = instr_data->words[nibl_count];
+      instr_byte = instr_data->bytes[nibl_count&~1];
+      instr_word = instr_data->words[nibl_count&~3];
 
       tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
       datum_class = tabl_datum & CLASS_MASK;
@@ -332,11 +347,18 @@ unpack_instr (instr_data, is_segmented, info)
 	  switch (datum_value)
 	    {
 	    case ARG_DISP16:
-	      instr_data->displacement = instr_word;
+              instr_data->displacement = instr_data->insn_start + 4 +
+                (signed short)(instr_word & 0xffff);
 	      nibl_count += 3;
 	      break;
 	    case ARG_DISP12:
-	      instr_data->displacement = instr_word & 0x0fff;
+              if (instr_word & 0x800) {  /* neg. 12 bit displacement */
+                instr_data->displacement = instr_data->insn_start + 2 -
+                  (signed short)((instr_word & 0xfff) | 0xf000) * 2;
+              }
+              else {
+                instr_data->displacement = instr_data->insn_start + 2 - (instr_word & 0x0fff) * 2;
+              }
 	      nibl_count += 2;
 	      break;
 	    default:
@@ -390,9 +412,11 @@ unpack_instr (instr_data, is_segmented, info)
 	case CLASS_CC:
 	  instr_data->cond_code = instr_nibl;
 	  break;
+#if 0
 	case CLASS_CTRL:
 	  instr_data->ctrl_code = instr_nibl;
 	  break;
+#endif
 	case CLASS_DA:
 	case CLASS_ADDRESS:
 	  if (is_segmented)
@@ -405,6 +429,7 @@ unpack_instr (instr_data, is_segmented, info)
 		  instr_data->address = ((instr_word & 0x7f00) << 8) +
 		    (instr_long & 0xffff);
 		  nibl_count += 7;
+                  seg_length = 2;
 		}
 	      else
 		{
@@ -420,17 +445,15 @@ unpack_instr (instr_data, is_segmented, info)
 	    }
 	  break;
 	case CLASS_0CCC:
-	  instr_data->cond_code = instr_nibl & 0x7;
-	  break;
 	case CLASS_1CCC:
-	  instr_data->cond_code = instr_nibl & 0x7;
+	  instr_data->ctrl_code = instr_nibl & 0x7;
 	  break;
 	case CLASS_0DISP7:
-	  instr_data->displacement = instr_byte & 0x7f;
+	  instr_data->displacement = instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
 	  nibl_count += 1;
 	  break;
 	case CLASS_1DISP7:
-	  instr_data->displacement = instr_byte & 0x7f;
+	  instr_data->displacement = instr_data->insn_start + 2 - (instr_byte & 0x7f) * 2;
 	  nibl_count += 1;
 	  break;
 	case CLASS_01II:
@@ -440,7 +463,7 @@ unpack_instr (instr_data, is_segmented, info)
 	  instr_data->interrupts = instr_nibl & 0x3;
 	  break;
 	case CLASS_BIT:
-	  /* Do nothing.  */
+	  instr_data->ctrl_code = instr_nibl & 0x7;
 	  break;
 	case CLASS_IR:
 	  instr_data->arg_reg[datum_value] = instr_nibl;
@@ -466,6 +489,13 @@ unpack_instr (instr_data, is_segmented, info)
 	case CLASS_REGN0:
 	  instr_data->arg_reg[datum_value] = instr_nibl;
 	  break;
+	case CLASS_PR:
+	  instr_data->arg_reg[datum_value] = instr_nibl;
+	  break;
+        case CLASS_DISP8:
+	  instr_data->displacement = instr_data->insn_start + 2  + (signed char)instr_byte * 2;
+	  nibl_count += 1;
+          break;
 	default:
 	  break;
 	}
@@ -476,10 +506,12 @@ unpack_instr (instr_data, is_segmented, info)
 }
 
 static void
-unparse_instr (instr_data)
+unparse_instr (instr_data,is_segmented)
      instr_data_s *instr_data;
+     int is_segmented;
 {
-  unsigned short tabl_datum, datum_class, datum_value;
+  unsigned short datum_value;
+  unsigned int tabl_datum, datum_class;
   int loop, loop_limit;
   char out_str[80], tmp_str[25];
 
@@ -513,7 +545,7 @@ unparse_instr (instr_data)
 	  strcat (out_str, tmp_str);
 	  break;
 	case CLASS_DISP:
-	  sprintf (tmp_str, "#0x%0lx", instr_data->displacement);
+	  sprintf (tmp_str, "0x%0lx", instr_data->displacement);
 	  strcat (out_str, tmp_str);
 	  break;
 	case CLASS_IMM:
@@ -525,12 +557,12 @@ unparse_instr (instr_data)
 	  strcat (out_str, tmp_str);
 	  break;
 	case CLASS_CTRL:
-	  sprintf (tmp_str, "0x%0lx", instr_data->ctrl_code);
+	  sprintf (tmp_str, "%s", ctrl_names[instr_data->ctrl_code]);
 	  strcat (out_str, tmp_str);
 	  break;
 	case CLASS_DA:
 	case CLASS_ADDRESS:
-	  sprintf (tmp_str, "#0x%0lx", instr_data->address);
+	  sprintf (tmp_str, "0x%0lx", instr_data->address);
 	  strcat (out_str, tmp_str);
 	  break;
 	case CLASS_IR:
@@ -565,6 +597,13 @@ unparse_instr (instr_data)
 	  sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
 	  strcat (out_str, tmp_str);
 	  break;
+	case CLASS_PR:
+          if (is_segmented)
+            sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
+          else
+            sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
+	  strcat (out_str, tmp_str);
+	  break;
 	default:
 	  break;
 	}