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* generalization

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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()
This commit is contained in:
Frank Ch. Eigler
2001-01-02 16:34:07 +00:00
parent 3d85563291
commit aed80daedf
4 changed files with 37 additions and 189 deletions
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118
opcodes/cgen-ibld.in
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@ -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;