Improved display of register lists.

[binutils.git] / opcodes / v850-dis.c

diff --git a/opcodes/v850-dis.c b/opcodes/v850-dis.c
index 17cfb9cdc34949a9aa957a1ca5e037217ff5957c..8719a6913bc31ac3d909a262c70ce1dd2332741a 100644 (file)
--- a/opcodes/v850-dis.c
+++ b/opcodes/v850-dis.c
@@ -164,9 +164,12 @@ disassemble (memaddr, info, insn)
                    static int list18_h_regs[32] = { 19, 18, 17, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 30, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 };
                    static int list18_l_regs[32] = {  3,  2,  1, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 14, 15, 13, 12,  7,  6,  5,  4, 11, 10,  9,  8 };
 /* end-sanitize-v850eq */
-                   int *      regs;
-                   int        i;
-                   int        shown_one = false;
+                   int *             regs;
+                   int               i;
+                   unsigned long int mask = 0;
+                   int               pc   = false;
+                   int               sr   = false;
+                   
                    
                    switch (operand->shift)
                      {
@@ -180,27 +183,63 @@ disassemble (memaddr, info, insn)
                        abort();
                      }
 
-                   info->fprintf_func (info->stream, "{");
                    for (i = 0; i < 32; i++)
                      {
                        if (value & (1 << i))
                          {
-                           if (shown_one)
-                             info->fprintf_func (info->stream, ",");
-                           else
-                             shown_one = true;
-                             
                            switch (regs[ i ])
                              {
-                             default: info->fprintf_func (info->stream, "%s", v850_reg_names[regs[ i ]]); break;
+                             default: mask |= (1 << regs[ i ]); break;
 /* start-sanitize-v850eq */
                              case 0:  fprintf (stderr, "unknown pop reg: %d\n", i ); abort();
-                             case -1: info->fprintf_func (info->stream, "PC "); break;
-                             case -2: info->fprintf_func (info->stream, "SR"); break;
+                             case -1: pc = true; break;
+                             case -2: sr = true; break;
 /* end-sanitize-v850eq */
                              }
                          }
                      }
+
+                   info->fprintf_func (info->stream, "{");
+                   
+                   if (mask || pc || sr)
+                     {
+                       if (mask)
+                         {
+                           unsigned int bit;
+                           int          shown_one = false;
+                           
+                           for (bit = 0; bit < 32; bit++)
+                             if (mask & (1 << bit))
+                               {
+                                 unsigned long int first = bit;
+                                 unsigned long int last;
+
+                                 if (shown_one)
+                                   info->fprintf_func (info->stream, ", ");
+                                 else
+                                   shown_one = true;
+                                 
+                                 info->fprintf_func (info->stream, v850_reg_names[first]);
+                                 
+                                 for (bit++; bit < 32; bit++)
+                                   if ((mask & (1 << bit)) == 0)
+                                     break;
+
+                                 last = bit;
+
+                                 if (last > first + 1)
+                                   {
+                                     info->fprintf_func (info->stream, " - %s", v850_reg_names[ last - 1 ]);
+                                   }
+                               }
+                         }
+                       
+                       if (pc)
+                         info->fprintf_func (info->stream, "%sPC", mask ? ", " : "");
+                       if (sr)
+                         info->fprintf_func (info->stream, "%sSR", (mask || pc) ? ", " : "");
+                     }
+                   
                    info->fprintf_func (info->stream, "}");
                  }
                break;