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* doc/invoke.texi (TC_LARGEST_EXPONENT_IS_NORMAL): Document.

Browse Source 
* config/atof-ieee.c (TC_LARGEST_EXPONENT_IS_NORMAL): Add an
	argument for the precision.
	(gen_to_words): Update accordingly.
This commit is contained in:
Richard Sandiford 2002-04-11 11:11:35 +00:00
parent cd47f4f16f
commit 580a832ee0
3 changed files with 23 additions and 13 deletions
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7
gas/ChangeLog
View File

@ -1,3 +1,10 @@
2002-04-11 Richard Sandiford <rsandifo@redhat.com>
* doc/invoke.texi (TC_LARGEST_EXPONENT_IS_NORMAL): Document.
* config/atof-ieee.c (TC_LARGEST_EXPONENT_IS_NORMAL): Add an
argument for the precision.
(gen_to_words): Update accordingly.
2002-04-10 Alan Modra <amodra@bigpond.net.au>
* as.c (parse_args <OPTION_VERSION>): Use VERSION is

19
gas/config/atof-ieee.c
View File

@ -19,13 +19,6 @@
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* Some float formats are based on the IEEE standard, but use the
largest exponent for normal numbers instead of NaNs and infinites.
The macro TC_LARGEST_EXPONENT_IS_NORMAL should evaluate to true
if the target machine uses such a format. The macro can depend on
command line flags if necessary. There is no need to define the
macro if it would always be 0. */
#include "as.h"
/* Flonums returned here. */
@ -47,8 +40,8 @@ extern const char EXP_CHARS[];
/* Length in LittleNums of guard bits. */
#define GUARD (2)
#ifndef TC_LARGEST_EXPONENT_IS_NORMAL
#define TC_LARGEST_EXPONENT_IS_NORMAL 0
#ifndef TC_LARGEST_EXPONENT_IS_NORMAL(PRECISION)
#define TC_LARGEST_EXPONENT_IS_NORMAL(PRECISION) 0
#endif
static const unsigned long mask[] =
@ -302,7 +295,7 @@ gen_to_words (words, precision, exponent_bits)
/* NaN: Do the right thing. */
if (generic_floating_point_number.sign == 0)
{
if (TC_LARGEST_EXPONENT_IS_NORMAL)
if (TC_LARGEST_EXPONENT_IS_NORMAL (precision))
as_warn ("NaNs are not supported by this target\n");
if (precision == F_PRECISION)
{
@ -341,7 +334,7 @@ gen_to_words (words, precision, exponent_bits)
}
else if (generic_floating_point_number.sign == 'P')
{
if (TC_LARGEST_EXPONENT_IS_NORMAL)
if (TC_LARGEST_EXPONENT_IS_NORMAL (precision))
as_warn ("Infinities are not supported by this target\n");
/* +INF: Do the right thing. */
@ -382,7 +375,7 @@ gen_to_words (words, precision, exponent_bits)
}
else if (generic_floating_point_number.sign == 'N')
{
if (TC_LARGEST_EXPONENT_IS_NORMAL)
if (TC_LARGEST_EXPONENT_IS_NORMAL (precision))
as_warn ("Infinities are not supported by this target\n");
/* Negative INF. */
@ -598,7 +591,7 @@ gen_to_words (words, precision, exponent_bits)
return return_value;
}
else if ((unsigned long) exponent_4 > mask[exponent_bits]
|| (! TC_LARGEST_EXPONENT_IS_NORMAL
|| (! TC_LARGEST_EXPONENT_IS_NORMAL (precision)
&& (unsigned long) exponent_4 == mask[exponent_bits]))
{
/* Exponent overflow. Lose immediately. */

10
gas/doc/internals.texi
View File

@ -1151,6 +1151,16 @@ a pointer to a integer that should be filled in with the number of
gas/bignum.h). The function should return NULL upon success or an error string
upon failure.
@item TC_LARGEST_EXPONENT_IS_NORMAL
@cindex TC_LARGEST_EXPONENT_IS_NORMAL (@var{precision})
This macro is used only by @file{atof-ieee.c}. It should evaluate to true
if floats of the given precision use the largest exponent for normal numbers
instead of NaNs and infinities. @var{precision} is @samp{F_PRECISION} for
single precision, @samp{D_PRECISION} for double precision, or
@samp{X_PRECISION} for extended double precision.
The macro has a default definition which returns 0 for all cases.
@item md_reloc_size
@cindex md_reloc_size
This variable is only used in the original version of gas (not