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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* Round double value to long int.
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Copyright (C) 1997-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <fenv.h>
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#include <limits.h>
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-double.h>
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#include <fix-fp-int-convert-overflow.h>
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/* For LP64, lround is an alias for llround. */
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#ifndef _LP64
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long int
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__lround (double x)
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{
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int32_t j0;
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int64_t i0;
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long int result;
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int sign;
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EXTRACT_WORDS64 (i0, x);
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j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
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sign = i0 < 0 ? -1 : 1;
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i0 &= UINT64_C(0xfffffffffffff);
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i0 |= UINT64_C(0x10000000000000);
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if (j0 < (int32_t) (8 * sizeof (long int)) - 1)
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{
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if (j0 < 0)
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return j0 < -1 ? 0 : sign;
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else if (j0 >= 52)
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result = i0 << (j0 - 52);
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else
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{
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i0 += UINT64_C(0x8000000000000) >> j0;
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result = i0 >> (52 - j0);
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#ifdef FE_INVALID
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if (sizeof (long int) == 4
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&& sign == 1
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&& result == LONG_MIN)
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/* Rounding brought the value out of range. */
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feraiseexcept (FE_INVALID);
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#endif
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}
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}
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else
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{
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/* The number is too large. Unless it rounds to LONG_MIN,
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FE_INVALID must be raised and the return value is
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unspecified. */
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#ifdef FE_INVALID
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if (FIX_DBL_LONG_CONVERT_OVERFLOW
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&& !(sign == -1
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&& (sizeof (long int) == 4
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? x > (double) LONG_MIN - 0.5
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: x >= (double) LONG_MIN)))
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{
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feraiseexcept (FE_INVALID);
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return sign == 1 ? LONG_MAX : LONG_MIN;
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}
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else if (!FIX_DBL_LONG_CONVERT_OVERFLOW
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&& sizeof (long int) == 4
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&& x <= (double) LONG_MIN - 0.5)
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{
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/* If truncation produces LONG_MIN, the cast will not raise
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the exception, but may raise "inexact". */
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feraiseexcept (FE_INVALID);
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return LONG_MIN;
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}
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#endif
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return (long int) x;
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}
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return sign * result;
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}
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libm_alias_double (__lround, lround)
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#endif
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