1 files changed, 51 insertions, 0 deletions
diff --git a/libc/ports/sysdeps/aarch64/fpu/s_lround.c b/libc/ports/sysdeps/aarch64/fpu/s_lround.c
new file mode 100644
index 000000000..83748ae39
--- /dev/null
+++ b/libc/ports/sysdeps/aarch64/fpu/s_lround.c
@@ -0,0 +1,51 @@
+/* Copyright (C) 1996-2012 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.
+
+   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>
+
+#ifndef FUNC
+# define FUNC lround
+#endif
+
+#ifndef ITYPE
+# define ITYPE double
+# define IREGS "d"
+#else
+# ifndef IREGS
+#  error IREGS not defined
+# endif
+#endif
+
+#ifndef OTYPE
+# define OTYPE long int
+#endif
+
+#define OREGS "x"
+
+#define __CONCATX(a,b) __CONCAT(a,b)
+
+OTYPE
+__CONCATX(__,FUNC) (ITYPE x)
+{
+  OTYPE result;
+  asm ( "fcvtas" "\t%" OREGS "0, %" IREGS "1"
+        : "=r" (result) : "w" (x) );
+  return result;
+}
+
+weak_alias (__CONCATX(__,FUNC), FUNC)