/* Floating point routines for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004 Free Software
- Foundation, Inc.
+ Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005
+ Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
/* Support for converting target fp numbers into host DOUBLEST format. */
can convert to doublest will need. */
#define FLOATFORMAT_LARGEST_BYTES 16
-static unsigned long get_field (unsigned char *,
- enum floatformat_byteorders,
- unsigned int, unsigned int, unsigned int);
-
/* Extract a field which starts at START and is LEN bytes long. DATA and
TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */
static unsigned long
-get_field (unsigned char *data, enum floatformat_byteorders order,
+get_field (const bfd_byte *data, enum floatformat_byteorders order,
unsigned int total_len, unsigned int start, unsigned int len)
{
unsigned long result;
return result;
}
-/* Normalize the byte order of FROM into TO. If no normalization is needed
- then FMT->byteorder is returned and TO is not changed; otherwise the format
- of the normalized form in TO is returned. */
+/* Normalize the byte order of FROM into TO. If no normalization is
+ needed then FMT->byteorder is returned and TO is not changed;
+ otherwise the format of the normalized form in TO is returned. */
+
static enum floatformat_byteorders
floatformat_normalize_byteorder (const struct floatformat *fmt,
const void *from, void *to)
|| fmt->byteorder == floatformat_big)
return fmt->byteorder;
- gdb_assert (fmt->byteorder == floatformat_littlebyte_bigword);
-
words = fmt->totalsize / FLOATFORMAT_CHAR_BIT;
words >>= 2;
swapout = (unsigned char *)to;
swapin = (const unsigned char *)from;
- while (words-- > 0)
+ if (fmt->byteorder == floatformat_vax)
{
- *swapout++ = swapin[3];
- *swapout++ = swapin[2];
- *swapout++ = swapin[1];
- *swapout++ = swapin[0];
- swapin += 4;
+ while (words-- > 0)
+ {
+ *swapout++ = swapin[1];
+ *swapout++ = swapin[0];
+ *swapout++ = swapin[3];
+ *swapout++ = swapin[2];
+ swapin += 4;
+ }
+ /* This may look weird, since VAX is little-endian, but it is
+ easier to translate to big-endian than to little-endian. */
+ return floatformat_big;
+ }
+ else
+ {
+ gdb_assert (fmt->byteorder == floatformat_littlebyte_bigword);
+
+ while (words-- > 0)
+ {
+ *swapout++ = swapin[3];
+ *swapout++ = swapin[2];
+ *swapout++ = swapin[1];
+ *swapout++ = swapin[0];
+ swapin += 4;
+ }
+ return floatformat_big;
}
- return floatformat_big;
}
/* Convert from FMT to a DOUBLEST.
#endif /* HAVE_LONG_DOUBLE */
-/* The converse: convert the DOUBLEST *FROM to an extended float
- and store where TO points. Neither FROM nor TO have any alignment
+/* The converse: convert the DOUBLEST *FROM to an extended float and
+ store where TO points. Neither FROM nor TO have any alignment
restrictions. */
static void
convert_doublest_to_floatformat (CONST struct floatformat *fmt,
- const DOUBLEST *from,
- void *to)
+ const DOUBLEST *from, void *to)
{
DOUBLEST dfrom;
int exponent;
int mant_bits_left;
unsigned char *uto = (unsigned char *) to;
enum floatformat_byteorders order = fmt->byteorder;
+ unsigned char newto[FLOATFORMAT_LARGEST_BYTES];
- if (order == floatformat_littlebyte_bigword)
+ if (order != floatformat_little)
order = floatformat_big;
+ if (order != fmt->byteorder)
+ uto = newto;
+
memcpy (&dfrom, from, sizeof (dfrom));
memset (uto, 0, (fmt->totalsize + FLOATFORMAT_CHAR_BIT - 1)
/ FLOATFORMAT_CHAR_BIT);
finalize_byteorder:
/* Do we need to byte-swap the words in the result? */
if (order != fmt->byteorder)
- {
- int words;
- unsigned char *curword = uto;
- unsigned char tmp;
-
- words = fmt->totalsize / FLOATFORMAT_CHAR_BIT;
- words >>= 2;
- while (words-- > 0)
- {
- tmp = curword[0];
- curword[0] = curword[3];
- curword[3] = tmp;
- tmp = curword[1];
- curword[1] = curword[2];
- curword[2] = tmp;
- curword += 4;
- }
- }
+ floatformat_normalize_byteorder (fmt, newto, to);
}
/* Check if VAL (which is assumed to be a floating point number whose
format is described by FMT) is negative. */
int
-floatformat_is_negative (const struct floatformat *fmt, char *val)
+floatformat_is_negative (const struct floatformat *fmt,
+ const bfd_byte *uval)
{
- unsigned char *uval = (unsigned char *) val;
enum floatformat_byteorders order;
unsigned char newfrom[FLOATFORMAT_LARGEST_BYTES];
/* Check if VAL is "not a number" (NaN) for FMT. */
int
-floatformat_is_nan (const struct floatformat *fmt, char *val)
+floatformat_is_nan (const struct floatformat *fmt,
+ const bfd_byte *uval)
{
- unsigned char *uval = (unsigned char *) val;
long exponent;
unsigned long mant;
unsigned int mant_bits, mant_off;
point number whose format is described by FMT) into a hexadecimal
and store it in a static string. Return a pointer to that string. */
-char *
-floatformat_mantissa (const struct floatformat *fmt, char *val)
+const char *
+floatformat_mantissa (const struct floatformat *fmt,
+ const bfd_byte *val)
{
unsigned char *uval = (unsigned char *) val;
unsigned long mant;
int mant_bits_left;
static char res[50];
char buf[9];
+ int len;
enum floatformat_byteorders order;
unsigned char newfrom[FLOATFORMAT_LARGEST_BYTES];
mant = get_field (uval, order, fmt->totalsize, mant_off, mant_bits);
- sprintf (res, "%lx", mant);
+ len = xsnprintf (res, sizeof res, "%lx", mant);
mant_off += mant_bits;
mant_bits_left -= mant_bits;
-
+
while (mant_bits_left > 0)
{
mant = get_field (uval, order, fmt->totalsize, mant_off, 32);
- sprintf (buf, "%08lx", mant);
+ xsnprintf (buf, sizeof buf, "%08lx", mant);
+ gdb_assert (len + strlen (buf) <= sizeof res);
strcat (res, buf);
mant_off += 32;
else
format = NULL;
if (format == NULL)
- error ("Unrecognized %d-bit floating-point type.",
+ error (_("Unrecognized %d-bit floating-point type."),
len * TARGET_CHAR_BIT);
return format;
}
assumption might be wrong on targets that support
floating-point types that only differ in endianness for
example. So we warn instead, and zero out the target buffer. */
- warning ("Can't convert floating-point number to desired type.");
+ warning (_("Can't convert floating-point number to desired type."));
memset (to, 0, TYPE_LENGTH (to_type));
}
else if (from_fmt == to_fmt)
projects / deliverable / binutils-gdb.git / blobdiff