diff options
Diffstat (limited to 'stdlib/strtod.c')
| -rw-r--r-- | stdlib/strtod.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/stdlib/strtod.c b/stdlib/strtod.c index 5b15859066..0de96a571b 100644 --- a/stdlib/strtod.c +++ b/stdlib/strtod.c @@ -226,7 +226,7 @@ round_and_return (mp_limb_t *retval, int exponent, int negative, int i; round_limb = retval[RETURN_LIMB_SIZE - 1]; - round_bit = BITS_PER_MP_LIMB - 1; + round_bit = (MANT_DIG - 1) % BITS_PER_MP_LIMB; for (i = 0; i < RETURN_LIMB_SIZE; ++i) more_bits |= retval[i] != 0; MPN_ZERO (retval, RETURN_LIMB_SIZE); @@ -254,7 +254,13 @@ round_and_return (mp_limb_t *retval, int exponent, int negative, round_bit = shift - 1; (void) __mpn_rshift (retval, retval, RETURN_LIMB_SIZE, shift); } - exponent = MIN_EXP - 2; + /* This is a hook for the m68k long double format, where the + exponent bias is the same for normalized and denormalized + numbers. */ +#ifndef DENORM_EXP +# define DENORM_EXP (MIN_EXP - 2) +#endif + exponent = DENORM_EXP; } if ((round_limb & (((mp_limb_t) 1) << round_bit)) != 0 @@ -273,7 +279,7 @@ round_and_return (mp_limb_t *retval, int exponent, int negative, retval[RETURN_LIMB_SIZE - 1] |= ((mp_limb_t) 1) << ((MANT_DIG - 1) % BITS_PER_MP_LIMB); } - else if (exponent == MIN_EXP - 2 + else if (exponent == DENORM_EXP && (retval[RETURN_LIMB_SIZE - 1] & (((mp_limb_t) 1) << ((MANT_DIG - 1) % BITS_PER_MP_LIMB))) != 0) |