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5f34491510
Similar to string2.h (18b10de7ce) and string3.h (09a596cc2c) this patch removes the fenvinline.h on all architectures. Currently only powerpc implements some optimizations. This kind of optimization is better implemented by the compiler (which handles the architecture ISA transparently). Also, for the specific optimized powerpc implementation the code is becoming convoluted and these micro-optimization are hardly wildly used, even more being a possible hotspot in realword cases (non-default rounding are used only on specific cases and exception handling are done most likely only on errors path). Only x86 implements similar optimization (on fenv.h) also indicates that these should no be on libc. The math/test-fenv already covers all math/test-fenvinline tests, so it is safe to remove it. The powerpc fegetround optimization is moved to internal fenv_libc.h. The BZ#94193 [1] the corresponding GCC bug for adding replacements for these on powerpc. Checked on x86_64-linux-gnu and powerpc64le-linux-gnu. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94193
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/* Raise given exceptions.
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Copyright (C) 1997-2020 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_libc.h>
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int
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__feraiseexcept (int excepts)
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{
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fenv_union_t u;
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/* Raise exceptions represented by EXCEPTS. It is the responsibility of
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the OS to ensure that if multiple exceptions occur they are fed back
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to this process in the proper way; this can happen in hardware,
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anyway (in particular, inexact with overflow or underflow). */
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/* Get the current state. */
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u.fenv = fegetenv_register ();
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/* Add the exceptions */
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u.l = (u.l
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| (excepts & FPSCR_STICKY_BITS)
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/* Turn FE_INVALID into FE_INVALID_SOFTWARE. */
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| (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
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& FE_INVALID_SOFTWARE));
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/* Store the new status word (along with the rest of the environment),
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triggering any appropriate exceptions. */
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fesetenv_register (u.fenv);
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if ((excepts & FE_INVALID))
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{
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/* For some reason, some PowerPC chips (the 601, in particular)
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don't have FE_INVALID_SOFTWARE implemented. Detect this
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case and raise FE_INVALID_SNAN instead. */
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u.fenv = fegetenv_register ();
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if ((u.l & FE_INVALID) == 0)
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set_fpscr_bit (FPSCR_VXSNAN);
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}
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/* Success. */
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return 0;
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}
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
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strong_alias (__feraiseexcept, __old_feraiseexcept)
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compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
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#endif
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libm_hidden_def (__feraiseexcept)
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libm_hidden_ver (__feraiseexcept, feraiseexcept)
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versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
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