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Diffstat (limited to 'sysdeps/s390/ldbl2mpn.c')
-rw-r--r--sysdeps/s390/ldbl2mpn.c101
1 files changed, 0 insertions, 101 deletions
diff --git a/sysdeps/s390/ldbl2mpn.c b/sysdeps/s390/ldbl2mpn.c
deleted file mode 100644
index 1dac461aef..0000000000
--- a/sysdeps/s390/ldbl2mpn.c
+++ /dev/null
@@ -1,101 +0,0 @@
-/* Copyright (C) 1995, 1996, 1997 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
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include "gmp.h"
-#include "gmp-impl.h"
-#include "longlong.h"
-#include "ieee754.h"
-#include <float.h>
-#include <stdlib.h>
-
-/* Convert a `long double' in IEEE854 standard double-precision format to a
- multi-precision integer representing the significand scaled up by its
- number of bits (64 for long double) and an integral power of two
- (MPN frexpl). */
-
-mp_size_t
-__mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
- int *expt, int *is_neg,
- long double value)
-{
- union ieee854_long_double u;
- u.d = value;
-
- *is_neg = u.ieee.negative;
- *expt = (int) u.ieee.exponent - IEEE854_LONG_DOUBLE_BIAS;
-
-#if BITS_PER_MP_LIMB == 32
- res_ptr[0] = u.ieee.mantissa1; /* Low-order 32 bits of fraction. */
- res_ptr[1] = u.ieee.mantissa0; /* High-order 32 bits. */
- #define N 2
-#elif BITS_PER_MP_LIMB == 64
- /* Hopefully the compiler will combine the two bitfield extracts
- and this composition into just the original quadword extract. */
- res_ptr[0] = ((unsigned long int) u.ieee.mantissa0 << 32) | u.ieee.mantissa1;
- #define N 1
-#else
- #error "mp_limb size " BITS_PER_MP_LIMB "not accounted for"
-#endif
-
- if (u.ieee.exponent == 0)
- {
- /* A biased exponent of zero is a special case.
- Either it is a zero or it is a denormal number. */
- if (res_ptr[0] == 0 && res_ptr[N - 1] == 0) /* Assumes N<=2. */
- /* It's zero. */
- *expt = 0;
- else
- {
- /* It is a denormal number, meaning it has no implicit leading
- one bit, and its exponent is in fact the format minimum. */
- int cnt;
-
- /* One problem with Intel's 80-bit format is that the explicit
- leading one in the normalized representation has to be zero
- for denormalized number. If it is one, the number is according
- to Intel's specification an invalid number. We make the
- representation unique by explicitly clearing this bit. */
- res_ptr[N - 1] &= ~(1L << ((LDBL_MANT_DIG - 1) % BITS_PER_MP_LIMB));
-
- if (res_ptr[N - 1] != 0)
- {
- count_leading_zeros (cnt, res_ptr[N - 1]);
- if (cnt != 0)
- {
-#if N == 2
- res_ptr[N - 1] = res_ptr[N - 1] << cnt
- | (res_ptr[0] >> (BITS_PER_MP_LIMB - cnt));
- res_ptr[0] <<= cnt;
-#else
- res_ptr[N - 1] <<= cnt;
-#endif
- }
- *expt = LDBL_MIN_EXP - 1 - cnt;
- }
- else
- {
- 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;
- }
- }
- }
-
- return N;
-}