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ae3577f607
This patch is using the corresponding GCC builtin for nearbyintf, nearbyint, nearbintl and nearbyintf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins.h. This is the case for s390 if build with at least --march=z196 --mzarch. Otherwise the generic implementation is used. The code of the generic implementation is not changed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* Using math gcc builtins instead of generic implementation. s390/s390x version.
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Copyright (C) 2019 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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#ifndef MATH_USE_BUILTINS_S390_H
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#define MATH_USE_BUILTINS_S390_H 1
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#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
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# include <features.h> /* For __GNUC_PREREQ. */
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/* GCC emits the z196 zarch "load fp integer" instructions for these
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builtins if build with at least --march=z196 -mzarch. Otherwise a
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function call to libc is emitted. */
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# define USE_NEARBYINT_BUILTIN 1
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# define USE_NEARBYINTF_BUILTIN 1
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# define USE_NEARBYINTL_BUILTIN 1
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# if __GNUC_PREREQ (8, 0)
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# define USE_NEARBYINTF128_BUILTIN 1
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# else
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# define USE_NEARBYINTF128_BUILTIN 0
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# endif
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#else
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/* Disable the builtins if we do not have the z196 zarch instructions. */
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# define USE_NEARBYINT_BUILTIN 0
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# define USE_NEARBYINTF_BUILTIN 0
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# define USE_NEARBYINTL_BUILTIN 0
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# define USE_NEARBYINTF128_BUILTIN 0
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#endif /* ! HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT */
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#endif /* math-use-builtins.h */
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