auto import from //depot/cupcake/@135843
diff --git a/libm/src/e_sinhf.c b/libm/src/e_sinhf.c
new file mode 100644
index 0000000..02e753f
--- /dev/null
+++ b/libm/src/e_sinhf.c
@@ -0,0 +1,60 @@
+/* e_sinhf.c -- float version of e_sinh.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#ifndef lint
+static char rcsid[] = "$FreeBSD: src/lib/msun/src/e_sinhf.c,v 1.8 2005/11/13 00:41:46 bde Exp $";
+#endif
+
+#include "math.h"
+#include "math_private.h"
+
+static const float one = 1.0, shuge = 1.0e37;
+
+float
+__ieee754_sinhf(float x)
+{
+ float t,w,h;
+ int32_t ix,jx;
+
+ GET_FLOAT_WORD(jx,x);
+ ix = jx&0x7fffffff;
+
+ /* x is INF or NaN */
+ if(ix>=0x7f800000) return x+x;
+
+ h = 0.5;
+ if (jx<0) h = -h;
+ /* |x| in [0,9], return sign(x)*0.5*(E+E/(E+1))) */
+ if (ix < 0x41100000) { /* |x|<9 */
+ if (ix<0x39800000) /* |x|<2**-12 */
+ if(shuge+x>one) return x;/* sinh(tiny) = tiny with inexact */
+ t = expm1f(fabsf(x));
+ if(ix<0x3f800000) return h*((float)2.0*t-t*t/(t+one));
+ return h*(t+t/(t+one));
+ }
+
+ /* |x| in [9, logf(maxfloat)] return 0.5*exp(|x|) */
+ if (ix < 0x42b17217) return h*__ieee754_expf(fabsf(x));
+
+ /* |x| in [logf(maxfloat), overflowthresold] */
+ if (ix<=0x42b2d4fc) {
+ w = __ieee754_expf((float)0.5*fabsf(x));
+ t = h*w;
+ return t*w;
+ }
+
+ /* |x| > overflowthresold, sinh(x) overflow */
+ return x*shuge;
+}