1 files changed, 68 insertions, 0 deletions
diff --git a/sysdeps/ieee754/soft-fp/s_fma.c b/sysdeps/ieee754/soft-fp/s_fma.c
new file mode 100644
index 0000000000..41cf81a74b
--- /dev/null
+++ b/sysdeps/ieee754/soft-fp/s_fma.c
@@ -0,0 +1,68 @@
+/* Implement fma using soft-fp.
+   Copyright (C) 2013-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file into
+   combinations with other programs, and to distribute those
+   combinations without any restriction coming from the use of this
+   file.  (The Lesser General Public License restrictions do apply in
+   other respects; for example, they cover modification of the file,
+   and distribution when not linked into a combine executable.)
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <libc-diag.h>
+#include <libm-alias-double.h>
+
+/* R_e is not set in cases where it is not used in packing, but the
+   compiler does not see that it is set in all cases where it is
+   used, resulting in warnings that it may be used uninitialized.
+   The location of the warning differs in different versions of GCC,
+   it may be where R is defined using a macro or it may be where the
+   macro is defined.  */
+DIAG_PUSH_NEEDS_COMMENT;
+DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wmaybe-uninitialized");
+
+#include "soft-fp.h"
+#include "double.h"
+
+double
+__fma (double a, double b, double c)
+{
+  FP_DECL_EX;
+  FP_DECL_D (A);
+  FP_DECL_D (B);
+  FP_DECL_D (C);
+  FP_DECL_D (R);
+  double r;
+
+  FP_INIT_ROUNDMODE;
+  FP_UNPACK_D (A, a);
+  FP_UNPACK_D (B, b);
+  FP_UNPACK_D (C, c);
+  FP_FMA_D (R, A, B, C);
+  FP_PACK_D (r, R);
+  FP_HANDLE_EXCEPTIONS;
+
+  return r;
+}
+DIAG_POP_NEEDS_COMMENT;
+
+#ifndef __fma
+libm_alias_double (__fma, fma)
+#endif