Blame sysdeps/x86_64/fpu/s_truncl.S
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/* Truncate long double value.
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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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#include <libm-alias-ldouble.h>
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#include <machine/asm.h>
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ENTRY(__truncl)
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fldt 8(%rsp)
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fnstenv -28(%rsp)
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movl $0xc00, %edx
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orl -28(%rsp), %edx
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movl %edx, -32(%rsp)
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fldcw -32(%rsp)
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frndint
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fnstsw
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andl $0x1, %eax
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orl %eax, -24(%rsp)
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fldenv -28(%rsp)
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ret
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END(__truncl)
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libm_alias_ldouble (__trunc, trunc)
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