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9755bc4686
Continuing the move to use, within libm, public names for libm functions that can be inlined as built-in functions on many architectures, this patch moves calls to __round functions to call the corresponding round names instead, with asm redirection to __round when the calls are not inlined. An additional complication arises in sysdeps/ieee754/ldbl-128ibm/e_expl.c, where a call to roundl, with the result converted to int, gets converted by the compiler to call lroundl in the case of 32-bit long, so resulting in localplt test failures. It's logically correct to let the compiler make such an optimization; an appropriate asm redirection of lroundl to __lroundl is thus added to that file (it's not needed anywhere else). Tested for x86_64, and with build-many-glibcs.py. * include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (round): Redirect using MATH_REDIRECT. * sysdeps/aarch64/fpu/s_round.c: Define NO_MATH_REDIRECT before header inclusion. * sysdeps/aarch64/fpu/s_roundf.c: Likewise. * sysdeps/ieee754/dbl-64/s_round.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_round.c: Likewise. * sysdeps/ieee754/float128/s_roundf128.c: Likewise. * sysdeps/ieee754/flt-32/s_roundf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_roundl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_roundl.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_round.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_roundf.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_round.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_round.c: Likewise. * sysdeps/riscv/rvf/s_roundf.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_roundl.c: Likewise. (round): Redirect to __round. (__roundl): Call round instead of __round. * sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__round): Remove macro. [_ARCH_PWR5X] (__roundf): Likewise. * sysdeps/ieee754/dbl-64/e_gamma_r.c (gamma_positive): Use round functions instead of __round variants. * sysdeps/ieee754/flt-32/e_gammaf_r.c (gammaf_positive): Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/x86/fpu/powl_helper.c (__powl_helper): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_expl.c (lroundl): Redirect to __lroundl. (__ieee754_expl): Call roundl instead of __roundl.
95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/* Round long double to integer away from zero.
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Copyright (C) 1997-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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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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<http://www.gnu.org/licenses/>. */
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#define NO_MATH_REDIRECT
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-ldouble.h>
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long double
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__roundl (long double x)
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{
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int32_t j0;
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uint32_t se, i1, i0;
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GET_LDOUBLE_WORDS (se, i0, i1, x);
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j0 = (se & 0x7fff) - 0x3fff;
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if (j0 < 31)
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{
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if (j0 < 0)
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{
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se &= 0x8000;
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i0 = i1 = 0;
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if (j0 == -1)
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{
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se |= 0x3fff;
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i0 = 0x80000000;
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}
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}
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else
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{
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uint32_t i = 0x7fffffff >> j0;
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if (((i0 & i) | i1) == 0)
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/* X is integral. */
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return x;
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uint32_t j = i0 + (0x40000000 >> j0);
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if (j < i0)
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se += 1;
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i0 = (j & ~i) | 0x80000000;
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i1 = 0;
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}
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}
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else if (j0 > 62)
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{
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if (j0 == 0x4000)
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/* Inf or NaN. */
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return x + x;
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else
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return x;
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}
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else
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{
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uint32_t i = 0xffffffff >> (j0 - 31);
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if ((i1 & i) == 0)
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/* X is integral. */
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return x;
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uint32_t j = i1 + (1 << (62 - j0));
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if (j < i1)
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{
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uint32_t k = i0 + 1;
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if (k < i0)
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{
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se += 1;
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k |= 0x80000000;
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}
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i0 = k;
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}
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i1 = j;
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i1 &= ~i;
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}
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SET_LDOUBLE_WORDS (x, se, i0, i1);
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return x;
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}
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libm_alias_ldouble (__round, round)
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