* generalization

2001-01-02  Richard Sandiford  <rsandifo@redhat.com>

	* cgen-dis.c (hash_insn_array): Use bfd_put_bits().
	(hash_insn_list): Likewise
	* cgen-ibld.in (insert_1): Use bfd_put_bits() and bfd_get_bits().
	(extract_1): Use bfd_get_bits().
	(extract_normal): Apply sign extension to both extraction
	methods.
	* cgen-opc.c (cgen_get_insn_value): Use bfd_get_bits()
	(cgen_put_insn_value): Use bfd_put_bits()

1 files changed, 15 insertions, 103 deletions

diff --git a/opcodes/cgen-ibld.in b/opcodes/cgen-ibld.in
index 5103293..f5107a1 100644
--- a/opcodes/cgen-ibld.in
+++ b/opcodes/cgen-ibld.in
@@ -78,34 +78,7 @@ insert_1 (cd, value, start, length, word_length, bufp)
   int shift;
   int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
 
-  switch (word_length)
-    {
-    case 8:
-      x = *bufp;
-      break;
-    case 16:
-      if (big_p)
-	x = bfd_getb16 (bufp);
-      else
-	x = bfd_getl16 (bufp);
-      break;
-    case 24:
-      /* ??? This may need reworking as these cases don't necessarily
-	 want the first byte and the last two bytes handled like this.  */
-      if (big_p)
-	x = (bufp[0] << 16) | bfd_getb16 (bufp + 1);
-      else
-	x = bfd_getl16 (bufp) | (bufp[2] << 16);
-      break;
-    case 32:
-      if (big_p)
-	x = bfd_getb32 (bufp);
-      else
-	x = bfd_getl32 (bufp);
-      break;
-    default :
-      abort ();
-    }
+  x = bfd_get_bits (bufp, word_length, big_p);
 
   /* Written this way to avoid undefined behaviour.  */
   mask = (((1L << (length - 1)) - 1) << 1) | 1;
@@ -115,40 +88,7 @@ insert_1 (cd, value, start, length, word_length, bufp)
     shift = (word_length - (start + length));
   x = (x & ~(mask << shift)) | ((value & mask) << shift);
 
-  switch (word_length)
-    {
-    case 8:
-      *bufp = x;
-      break;
-    case 16:
-      if (big_p)
-	bfd_putb16 (x, bufp);
-      else
-	bfd_putl16 (x, bufp);
-      break;
-    case 24:
-      /* ??? This may need reworking as these cases don't necessarily
-	 want the first byte and the last two bytes handled like this.  */
-      if (big_p)
-	{
-	  bufp[0] = x >> 16;
-	  bfd_putb16 (x, bufp + 1);
-	}
-      else
-	{
-	  bfd_putl16 (x, bufp);
-	  bufp[2] = x >> 16;
-	}
-      break;
-    case 32:
-      if (big_p)
-	bfd_putb32 (x, bufp);
-      else
-	bfd_putl32 (x, bufp);
-      break;
-    default :
-      abort ();
-    }
+  bfd_put_bits ((bfd_vma) x, bufp, word_length, big_p);
 }
 
 #endif /* ! CGEN_INT_INSN_P */
@@ -406,46 +346,17 @@ extract_1 (cd, ex_info, start, length, word_length, bufp, pc)
      unsigned char *bufp;
      bfd_vma pc;
 {
-  unsigned long x,mask;
+  unsigned long x;
   int shift;
   int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
 
-  switch (word_length)
-    {
-    case 8:
-      x = *bufp;
-      break;
-    case 16:
-      if (big_p)
-	x = bfd_getb16 (bufp);
-      else
-	x = bfd_getl16 (bufp);
-      break;
-    case 24:
-      /* ??? This may need reworking as these cases don't necessarily
-	 want the first byte and the last two bytes handled like this.  */
-      if (big_p)
-	x = (bufp[0] << 16) | bfd_getb16 (bufp + 1);
-      else
-	x = bfd_getl16 (bufp) | (bufp[2] << 16);
-      break;
-    case 32:
-      if (big_p)
-	x = bfd_getb32 (bufp);
-      else
-	x = bfd_getl32 (bufp);
-      break;
-    default :
-      abort ();
-    }
+  x = bfd_get_bits (bufp, word_length, big_p);
 
-  /* Written this way to avoid undefined behaviour.  */
-  mask = (((1L << (length - 1)) - 1) << 1) | 1;
   if (CGEN_INSN_LSB0_P)
     shift = (start + 1) - length;
   else
     shift = (word_length - (start + length));
-  return (x >> shift) & mask;
+  return x >> shift;
 }
 
 #endif /* ! CGEN_INT_INSN_P */
@@ -489,7 +400,7 @@ extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length,
 #endif
      long *valuep;
 {
-  CGEN_INSN_INT value;
+  CGEN_INSN_INT value, mask;
 
   /* If LENGTH is zero, this operand doesn't contribute to the value
      so give it a standard value of zero.  */
@@ -521,18 +432,10 @@ extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length,
 
   if (CGEN_INT_INSN_P || word_offset == 0)
     {
-      /* Written this way to avoid undefined behaviour.  */
-      CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
-
       if (CGEN_INSN_LSB0_P)
 	value = insn_value >> ((word_offset + start + 1) - length);
       else
 	value = insn_value >> (total_length - ( word_offset + start + length));
-      value &= mask;
-      /* sign extend? */
-      if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
-	  && (value & (1L << (length - 1))))
-	value |= ~mask;
     }
 
 #if ! CGEN_INT_INSN_P
@@ -552,6 +455,15 @@ extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length,
 
 #endif /* ! CGEN_INT_INSN_P */
 
+  /* Written this way to avoid undefined behaviour.  */
+  mask = (((1L << (length - 1)) - 1) << 1) | 1;
+
+  value &= mask;
+  /* sign extend? */
+  if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
+      && (value & (1L << (length - 1))))
+    value |= ~mask;
+
   *valuep = value;
 
   return 1;