73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/* Implement fma using soft-fp.
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Copyright (C) 2013-2017 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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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file into
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combinations with other programs, and to distribute those
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combinations without any restriction coming from the use of this
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file. (The Lesser General Public License restrictions do apply in
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other respects; for example, they cover modification of the file,
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and distribution when not linked into a combine executable.)
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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 <math.h>
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#include <libc-diag.h>
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/* R_e is not set in cases where it is not used in packing, but the
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compiler does not see that it is set in all cases where it is
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used, resulting in warnings that it may be used uninitialized.
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The location of the warning differs in different versions of GCC,
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it may be where R is defined using a macro or it may be where the
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macro is defined. */
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DIAG_PUSH_NEEDS_COMMENT;
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DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wmaybe-uninitialized");
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#include "soft-fp.h"
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#include "double.h"
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double
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__fma (double a, double b, double c)
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{
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FP_DECL_EX;
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FP_DECL_D (A);
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FP_DECL_D (B);
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FP_DECL_D (C);
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FP_DECL_D (R);
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double r;
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FP_INIT_ROUNDMODE;
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FP_UNPACK_D (A, a);
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FP_UNPACK_D (B, b);
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FP_UNPACK_D (C, c);
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FP_FMA_D (R, A, B, C);
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FP_PACK_D (r, R);
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FP_HANDLE_EXCEPTIONS;
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return r;
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}
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DIAG_POP_NEEDS_COMMENT;
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#ifndef __fma
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weak_alias (__fma, fma)
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#endif
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#ifdef NO_LONG_DOUBLE
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strong_alias (__fma, __fmal)
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weak_alias (__fmal, fmal)
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#endif
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