/* atof_ieee.c - turn a Flonum into an IEEE floating point number
- Copyright (C) 1987, 92, 93, 94, 95, 96, 97, 1998
+ Copyright (C) 1987, 92, 93, 94, 95, 96, 97, 98, 1999
Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
char *
atof_ieee (str, what_kind, words)
char *str; /* Text to convert to binary. */
- char what_kind; /* 'd', 'f', 'g', 'h' */
+ int what_kind; /* 'd', 'f', 'g', 'h' */
LITTLENUM_TYPE *words; /* Build the binary here. */
{
/* Extra bits for zeroed low-order bits. The 1st MAX_PRECISION are
/* Bigger than one littlenum */
num_bits -= (LITTLENUM_NUMBER_OF_BITS - 1) - exponent_bits;
*lp++ = word1;
- if (num_bits + exponent_bits + 1 >= precision * LITTLENUM_NUMBER_OF_BITS)
+ if (num_bits + exponent_bits + 1 > precision * LITTLENUM_NUMBER_OF_BITS)
{
/* Exponent overflow */
make_invalid_floating_point_number (words);
if (next_bits (1))
{
--lp;
- if (prec_bits > LITTLENUM_NUMBER_OF_BITS)
+ if (prec_bits >= LITTLENUM_NUMBER_OF_BITS)
{
int n = 0;
int tmp_bits;
--n;
tmp_bits -= LITTLENUM_NUMBER_OF_BITS;
}
- if (tmp_bits > LITTLENUM_NUMBER_OF_BITS || (lp[n] & mask[tmp_bits]) != mask[tmp_bits])
+ if (tmp_bits > LITTLENUM_NUMBER_OF_BITS
+ || (lp[n] & mask[tmp_bits]) != mask[tmp_bits]
+ || (prec_bits != (precision * LITTLENUM_NUMBER_OF_BITS
+ - exponent_bits - 1)
+#ifdef TC_I386
+ /* An extended precision float with only the integer
+ bit set would be invalid. That must be converted
+ to the smallest normalized number. */
+ && !(precision == X_PRECISION
+ && prec_bits == (precision * LITTLENUM_NUMBER_OF_BITS
+ - exponent_bits - 2))
+#endif
+ ))
{
unsigned long carry;
<< ((LITTLENUM_NUMBER_OF_BITS - 1)
- exponent_bits));
*lp++ = word1;
+#ifdef TC_I386
+ /* Set the integer bit in the extended precision format.
+ This cannot happen on the m68k where the mantissa
+ just overflows into the integer bit above. */
+ if (precision == X_PRECISION)
+ *lp++ = 1 << (LITTLENUM_NUMBER_OF_BITS - 1);
+#endif
while (lp < words_end)
*lp++ = 0;
}
}
- else if ((*lp & mask[prec_bits]) != mask[prec_bits])
+ else
*lp += 1;
}