diff options
Diffstat (limited to 'sysdeps/i386/ldbl2mpn.c')
| -rw-r--r-- | sysdeps/i386/ldbl2mpn.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/sysdeps/i386/ldbl2mpn.c b/sysdeps/i386/ldbl2mpn.c index 631fe2eab4..386cf198e2 100644 --- a/sysdeps/i386/ldbl2mpn.c +++ b/sysdeps/i386/ldbl2mpn.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. +/* Copyright (C) 1995, 1996, 1997, 2000 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 @@ -87,13 +87,26 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size, } *expt = LDBL_MIN_EXP - 1 - cnt; } - else + else if (res_ptr[0] != 0) { count_leading_zeros (cnt, res_ptr[0]); res_ptr[N - 1] = res_ptr[0] << cnt; res_ptr[0] = 0; *expt = LDBL_MIN_EXP - 1 - BITS_PER_MP_LIMB - cnt; } + else + { + /* This is the special case of the pseudo denormal number + with only the implicit leading bit set. The value is + in fact a normal number and so we have to treat this + case differently. */ +#if N == 2 + res_ptr[N - 1] = 0x80000000ul; +#else + res_ptr[0] = 0x8000000000000000ul; +#endif + *expt = LDBL_MIN_EXP - 1; + } } } |