/* Floating point routines for GDB, the GNU debugger.
Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2007, 2008
+ 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
This file is part of GDB.
represents the number of bits from the end of our starting
byte needed to get to bit 0. */
int excess = FLOATFORMAT_CHAR_BIT - (total_len % FLOATFORMAT_CHAR_BIT);
+
cur_byte = (total_len / FLOATFORMAT_CHAR_BIT)
- ((start + len + excess) / FLOATFORMAT_CHAR_BIT);
cur_bitshift = ((start + len + excess) % FLOATFORMAT_CHAR_BIT)
if (kind == float_infinite || kind == float_nan)
{
double dto;
+
floatformat_to_double (fmt, from, &dto);
*to = (DOUBLEST) dto;
return;
if (fmt->split_half)
{
DOUBLEST dtop, dbot;
+
floatformat_to_doublest (fmt->split_half, ufrom, &dtop);
/* Preserve the sign of 0, which is the sign of the top
half. */
if (order == floatformat_little)
{
int excess = FLOATFORMAT_CHAR_BIT - (total_len % FLOATFORMAT_CHAR_BIT);
+
cur_byte = (total_len / FLOATFORMAT_CHAR_BIT)
- ((start + len + excess) / FLOATFORMAT_CHAR_BIT);
cur_bitshift = ((start + len + excess) % FLOATFORMAT_CHAR_BIT)
the result of converting to double. */
static volatile double dtop, dbot;
DOUBLEST dtopnv, dbotnv;
+
dtop = (double) dfrom;
/* If the rounded top half is Inf, the bottom must be 0 not NaN
or Inf. */
while (mant_bits_left > 0)
{
unsigned long mant_long;
+
mant_bits = mant_bits_left < 32 ? mant_bits_left : 32;
mant *= 4294967296.0;
if (fmt == host_float_format)
{
float val;
+
memcpy (&val, in, sizeof (val));
*out = val;
}
else if (fmt == host_double_format)
{
double val;
+
memcpy (&val, in, sizeof (val));
*out = val;
}
else if (fmt == host_long_double_format)
{
long double val;
+
memcpy (&val, in, sizeof (val));
*out = val;
}
if (fmt == host_float_format)
{
float val = *in;
+
memcpy (out, &val, sizeof (val));
}
else if (fmt == host_double_format)
{
double val = *in;
+
memcpy (out, &val, sizeof (val));
}
else if (fmt == host_long_double_format)
{
long double val = *in;
+
memcpy (out, &val, sizeof (val));
}
else
but not passed on by GDB. This should be fixed. */
static const struct floatformat *
-floatformat_from_length (int len)
+floatformat_from_length (struct gdbarch *gdbarch, int len)
{
const struct floatformat *format;
- if (len * TARGET_CHAR_BIT == gdbarch_float_bit (current_gdbarch))
- format = gdbarch_float_format (current_gdbarch)
- [gdbarch_byte_order (current_gdbarch)];
- else if (len * TARGET_CHAR_BIT == gdbarch_double_bit (current_gdbarch))
- format = gdbarch_double_format (current_gdbarch)
- [gdbarch_byte_order (current_gdbarch)];
- else if (len * TARGET_CHAR_BIT == gdbarch_long_double_bit (current_gdbarch))
- format = gdbarch_long_double_format (current_gdbarch)
- [gdbarch_byte_order (current_gdbarch)];
+
+ if (len * TARGET_CHAR_BIT == gdbarch_half_bit (gdbarch))
+ format = gdbarch_half_format (gdbarch)
+ [gdbarch_byte_order (gdbarch)];
+ else if (len * TARGET_CHAR_BIT == gdbarch_float_bit (gdbarch))
+ format = gdbarch_float_format (gdbarch)
+ [gdbarch_byte_order (gdbarch)];
+ else if (len * TARGET_CHAR_BIT == gdbarch_double_bit (gdbarch))
+ format = gdbarch_double_format (gdbarch)
+ [gdbarch_byte_order (gdbarch)];
+ else if (len * TARGET_CHAR_BIT == gdbarch_long_double_bit (gdbarch))
+ format = gdbarch_long_double_format (gdbarch)
+ [gdbarch_byte_order (gdbarch)];
/* On i386 the 'long double' type takes 96 bits,
while the real number of used bits is only 80,
both in processor and in memory.
The code below accepts the real bit size. */
- else if ((gdbarch_long_double_format (current_gdbarch) != NULL)
- && (len * TARGET_CHAR_BIT ==
- gdbarch_long_double_format (current_gdbarch)[0]->totalsize))
- format = gdbarch_long_double_format (current_gdbarch)
- [gdbarch_byte_order (current_gdbarch)];
+ else if ((gdbarch_long_double_format (gdbarch) != NULL)
+ && (len * TARGET_CHAR_BIT
+ == gdbarch_long_double_format (gdbarch)[0]->totalsize))
+ format = gdbarch_long_double_format (gdbarch)
+ [gdbarch_byte_order (gdbarch)];
else
format = NULL;
if (format == NULL)
const struct floatformat *
floatformat_from_type (const struct type *type)
{
+ struct gdbarch *gdbarch = get_type_arch (type);
+
gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT);
if (TYPE_FLOATFORMAT (type) != NULL)
- return TYPE_FLOATFORMAT (type)[gdbarch_byte_order (current_gdbarch)];
+ return TYPE_FLOATFORMAT (type)[gdbarch_byte_order (gdbarch)];
else
- return floatformat_from_length (TYPE_LENGTH (type));
-}
-
-/* If the host doesn't define NAN, use zero instead. */
-#ifndef NAN
-#define NAN 0.0
-#endif
-
-/* Extract a floating-point number of length LEN from a target-order
- byte-stream at ADDR. Returns the value as type DOUBLEST. */
-
-static DOUBLEST
-extract_floating_by_length (const void *addr, int len)
-{
- const struct floatformat *fmt = floatformat_from_length (len);
- DOUBLEST val;
-
- floatformat_to_doublest (fmt, addr, &val);
- return val;
-}
-
-DOUBLEST
-deprecated_extract_floating (const void *addr, int len)
-{
- return extract_floating_by_length (addr, len);
-}
-
-/* Store VAL as a floating-point number of length LEN to a
- target-order byte-stream at ADDR. */
-
-static void
-store_floating_by_length (void *addr, int len, DOUBLEST val)
-{
- const struct floatformat *fmt = floatformat_from_length (len);
-
- floatformat_from_doublest (fmt, &val, addr);
-}
-
-void
-deprecated_store_floating (void *addr, int len, DOUBLEST val)
-{
- store_floating_by_length (addr, len, val);
+ return floatformat_from_length (gdbarch, TYPE_LENGTH (type));
}
/* Extract a floating-point number of type TYPE from a target-order
DOUBLEST
extract_typed_floating (const void *addr, const struct type *type)
{
+ const struct floatformat *fmt = floatformat_from_type (type);
DOUBLEST retval;
- gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT);
-
- if (TYPE_FLOATFORMAT (type) == NULL)
- /* Not all code remembers to set the FLOATFORMAT (language
- specific code? stabs?) so handle that here as a special case. */
- return extract_floating_by_length (addr, TYPE_LENGTH (type));
-
- floatformat_to_doublest
- (TYPE_FLOATFORMAT (type)[gdbarch_byte_order (current_gdbarch)],
- addr, &retval);
+ floatformat_to_doublest (fmt, addr, &retval);
return retval;
}
void
store_typed_floating (void *addr, const struct type *type, DOUBLEST val)
{
- gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT);
+ const struct floatformat *fmt = floatformat_from_type (type);
/* FIXME: kettenis/2001-10-28: It is debatable whether we should
zero out any remaining bytes in the target buffer when TYPE is
See also the function convert_typed_floating below. */
memset (addr, 0, TYPE_LENGTH (type));
- if (TYPE_FLOATFORMAT (type) == NULL)
- /* Not all code remembers to set the FLOATFORMAT (language
- specific code? stabs?) so handle that here as a special case. */
- store_floating_by_length (addr, TYPE_LENGTH (type), val);
- else
- floatformat_from_doublest
- (TYPE_FLOATFORMAT (type)[gdbarch_byte_order (current_gdbarch)],
- &val, addr);
+ floatformat_from_doublest (fmt, &val, addr);
}
/* Convert a floating-point number of type FROM_TYPE from a
const struct floatformat *from_fmt = floatformat_from_type (from_type);
const struct floatformat *to_fmt = floatformat_from_type (to_type);
- gdb_assert (TYPE_CODE (from_type) == TYPE_CODE_FLT);
- gdb_assert (TYPE_CODE (to_type) == TYPE_CODE_FLT);
-
if (from_fmt == NULL || to_fmt == NULL)
{
/* If we don't know the floating-point format of FROM_TYPE or
projects / deliverable / binutils-gdb.git / blobdiff