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Fix strtod rounding (bug 3479).

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This commit is contained in:
Joseph Myers
2012-08-27 16:01:27 +00:00
parent d6e70f4368
commit af92131a8e
10 changed files with 7635 additions and 43 deletions
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12
stdlib/fpioconst.h
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@ -1,6 +1,5 @@
/* Header file for constants used in floating point <-> decimal conversions.
Copyright (C) 1995, 1996, 1997, 1998, 1999, 2002, 2003
Free Software Foundation, Inc.
Copyright (C) 1995-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -41,6 +40,13 @@
#define DBL_MAX_10_EXP_LOG 8 /* = floor(log_2(DBL_MAX_10_EXP)) */
#define FLT_MAX_10_EXP_LOG 5 /* = floor(log_2(FLT_MAX_10_EXP)) */
/* For strtold, we need powers of 10 up to floor (log_2 (LDBL_MANT_DIG
- LDBL_MIN_EXP + 2)). */
#if !defined __NO_LONG_DOUBLE_MATH && __LDBL_MAX_EXP__ > 1024
# define FPIOCONST_POW10_ARRAY_SIZE 15
#else
# define FPIOCONST_POW10_ARRAY_SIZE 11
#endif
/* The array with the number representation. */
extern const mp_limb_t __tens[] attribute_hidden;
@ -54,7 +60,7 @@ struct mp_power
int p_expo; /* Exponent of the number 10^(2^i). */
int m_expo; /* Exponent of the number 10^-(2^i-1). */
};
extern const struct mp_power _fpioconst_pow10[LDBL_MAX_10_EXP_LOG + 1]
extern const struct mp_power _fpioconst_pow10[FPIOCONST_POW10_ARRAY_SIZE]
attribute_hidden;
/* The constants in the array `_fpioconst_pow10' have an offset. */