diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_fromfpl_main.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_fromfpl_main.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_fromfpl_main.c b/sysdeps/ieee754/ldbl-128ibm/s_fromfpl_main.c deleted file mode 100644 index 8b9108e84d..0000000000 --- a/sysdeps/ieee754/ldbl-128ibm/s_fromfpl_main.c +++ /dev/null @@ -1,147 +0,0 @@ -/* Round to integer type. ldbl-128ibm version. - Copyright (C) 2016-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <fenv.h> -#include <math.h> -#include <math_private.h> -#include <stdbool.h> -#include <stdint.h> - -#define BIAS 0x3ff -#define MANT_DIG 53 - -#if UNSIGNED -# define RET_TYPE uintmax_t -#else -# define RET_TYPE intmax_t -#endif - -#include <fromfp.h> - -RET_TYPE -FUNC (long double x, int round, unsigned int width) -{ - double hi, lo; - if (width > INTMAX_WIDTH) - width = INTMAX_WIDTH; - uint64_t hx, lx; - ldbl_unpack (x, &hi, &lo); - EXTRACT_WORDS64 (hx, hi); - EXTRACT_WORDS64 (lx, lo); - bool negative = (hx & 0x8000000000000000ULL) != 0; - bool lo_negative = (lx & 0x8000000000000000ULL) != 0; - if (width == 0) - return fromfp_domain_error (negative, width); - hx &= 0x7fffffffffffffffULL; - lx &= 0x7fffffffffffffffULL; - if ((hx | lx) == 0) - return 0; - int hi_exponent = hx >> (MANT_DIG - 1); - hi_exponent -= BIAS; - int exponent = hi_exponent; - hx &= ((1ULL << (MANT_DIG - 1)) - 1); - if (hx == 0 && lx != 0 && lo_negative != negative) - exponent--; - int max_exponent = fromfp_max_exponent (negative, width); - if (exponent > max_exponent) - return fromfp_domain_error (negative, width); - int lo_exponent = lx >> (MANT_DIG - 1); - lo_exponent -= BIAS; - - /* Convert the high part to integer. */ - hx |= 1ULL << (MANT_DIG - 1); - uintmax_t uret; - bool half_bit, more_bits; - if (hi_exponent >= MANT_DIG - 1) - { - uret = hx; - uret <<= hi_exponent - (MANT_DIG - 1); - half_bit = false; - more_bits = false; - } - else if (hi_exponent >= -1) - { - uint64_t h = 1ULL << (MANT_DIG - 2 - hi_exponent); - half_bit = (hx & h) != 0; - more_bits = (hx & (h - 1)) != 0; - uret = hx >> (MANT_DIG - 1 - hi_exponent); - } - else - { - uret = 0; - half_bit = false; - more_bits = true; - } - - /* Likewise, the low part. */ - if (lx != 0) - { - uintmax_t lo_uret; - bool lo_half_bit, lo_more_bits; - lx &= ((1ULL << (MANT_DIG - 1)) - 1); - lx |= 1ULL << (MANT_DIG - 1); - /* The high part exponent is at most 64, so the low part - exponent is at most 11. */ - if (lo_exponent >= -1) - { - uint64_t h = 1ULL << (MANT_DIG - 2 - lo_exponent); - lo_half_bit = (lx & h) != 0; - lo_more_bits = (lx & (h - 1)) != 0; - lo_uret = lx >> (MANT_DIG - 1 - lo_exponent); - } - else - { - lo_uret = 0; - lo_half_bit = false; - lo_more_bits = true; - } - if (lo_negative == negative) - { - uret += lo_uret; - half_bit |= lo_half_bit; - more_bits |= lo_more_bits; - } - else - { - uret -= lo_uret; - if (lo_half_bit) - { - uret--; - half_bit = true; - } - if (lo_more_bits && !more_bits) - { - if (half_bit) - { - half_bit = false; - more_bits = true; - } - else - { - uret--; - half_bit = true; - more_bits = true; - } - } - } - } - - return fromfp_round_and_return (negative, uret, half_bit, more_bits, round, - exponent, max_exponent, width); -} |