auto import from //depot/cupcake/@135843
diff --git a/libm/src/s_nearbyint.c b/libm/src/s_nearbyint.c
new file mode 100644
index 0000000..246d325
--- /dev/null
+++ b/libm/src/s_nearbyint.c
@@ -0,0 +1,54 @@
+/*-
+ * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+/* __FBSDID("$FreeBSD: src/lib/msun/src/s_nearbyint.c,v 1.1 2004/07/06 04:46:08 das Exp $"); */
+
+#include <fenv.h>
+#include <math.h>
+
+/*
+ * We save and restore the floating-point environment to avoid raising
+ * an inexact exception. We can get away with using fesetenv()
+ * instead of feclearexcept()/feupdateenv() to restore the environment
+ * because the only exception defined for rint() is overflow, and
+ * rounding can't overflow as long as emax >= p.
+ */
+#define DECL(type, fn, rint) \
+type \
+fn(type x) \
+{ \
+ type ret; \
+ fenv_t env; \
+ \
+ fegetenv(&env); \
+ ret = rint(x); \
+ fesetenv(&env); \
+ return (ret); \
+}
+
+DECL(double, nearbyint, rint)
+DECL(float, nearbyintf, rintf)