102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
/* Inline floating-point environment handling functions for powerpc.
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Copyright (C) 1995-2020 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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#if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_FPRS__
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/* Inline definitions for fegetround. */
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# define __fegetround_ISA300() \
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(__extension__ ({ \
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union { double __d; unsigned long long __ll; } __u; \
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__asm__ __volatile__ ( \
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".machine push; .machine \"power9\"; mffsl %0; .machine pop" \
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: "=f" (__u.__d)); \
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__u.__ll & 0x0000000000000003LL; \
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}))
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# define __fegetround_ISA2() \
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(__extension__ ({ \
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int __fegetround_result; \
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__asm__ __volatile__ ("mcrfs 7,7 ; mfcr %0" \
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: "=r"(__fegetround_result) : : "cr7"); \
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__fegetround_result & 3; \
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}))
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# ifdef _ARCH_PWR9
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# define __fegetround() __fegetround_ISA300()
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# elif defined __BUILTIN_CPU_SUPPORTS__
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# define __fegetround() \
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(__glibc_likely (__builtin_cpu_supports ("arch_3_00")) \
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? __fegetround_ISA300() \
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: __fegetround_ISA2() \
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)
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# else
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# define __fegetround() __fegetround_ISA2()
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# endif
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# define fegetround() __fegetround ()
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# ifndef __NO_MATH_INLINES
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/* The weird 'i#*X' constraints on the following suppress a gcc
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warning when __excepts is not a constant. Otherwise, they mean the
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same as just plain 'i'. */
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# if __GNUC_PREREQ(3, 4)
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/* Inline definition for feraiseexcept. */
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# define feraiseexcept(__excepts) \
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(__extension__ ({ \
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int __e = __excepts; \
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int __ret; \
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if (__builtin_constant_p (__e) \
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&& (__e & (__e - 1)) == 0 \
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&& __e != FE_INVALID) \
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{ \
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if (__e != 0) \
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__asm__ __volatile__ ("mtfsb1 %0" \
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: : "i#*X" (__builtin_clz (__e))); \
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__ret = 0; \
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} \
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else \
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__ret = feraiseexcept (__e); \
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__ret; \
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}))
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/* Inline definition for feclearexcept. */
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# define feclearexcept(__excepts) \
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(__extension__ ({ \
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int __e = __excepts; \
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int __ret; \
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if (__builtin_constant_p (__e) \
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&& (__e & (__e - 1)) == 0 \
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&& __e != FE_INVALID) \
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{ \
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if (__e != 0) \
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__asm__ __volatile__ ("mtfsb0 %0" \
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: : "i#*X" (__builtin_clz (__e))); \
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__ret = 0; \
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} \
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else \
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__ret = feclearexcept (__e); \
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__ret; \
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}))
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# endif /* __GNUC_PREREQ(3, 4). */
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# endif /* !__NO_MATH_INLINES. */
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#endif /* __GNUC__ && !_SOFT_FLOAT && !__NO_FPRS__ */ |