[Beignet] [PATCH] backend: add double version of sinh

[rander]

	cp from fdlibm and pass the cft after refined

Signed-off-by: rander <rander.wang at intel.com>
---
 backend/src/libocl/tmpl/ocl_math_common.tmpl.cl | 40 +++++++++++++++++++++++++
 backend/src/libocl/tmpl/ocl_math_common.tmpl.h  |  1 +
 2 files changed, 41 insertions(+)

diff --git a/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl b/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl
index 290ec6b..378b3b0 100644
--- a/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl
+++ b/backend/src/libocl/tmpl/ocl_math_common.tmpl.cl
@@ -1732,6 +1732,46 @@ OVERLOADABLE double sin(double x)
 	}
 }
 
+OVERLOADABLE double sinh(double x)
+{
+	double one = 1.0, shuge = 1.0e307;
+	double t,w,h;
+	int ix,jx;
+	unsigned lx;
+
+	/* High word of |x|. */
+	jx = __HI(x);
+	ix = jx&0x7fffffff;
+
+	/* x is INF or NaN */
+	if(ix>=0x7ff00000) return x+x;
+
+	h = 0.5;
+	if (jx<0) h = -h;
+	/* |x| in [0,22], return sign(x)*0.5*(E+E/(E+1))) */
+	if (ix < 0x40360000) {		/* |x|<22 */
+		if (ix<0x3e300000) 		/* |x|<2**-28 */
+		if(shuge+x>one) return x;/* sinh(tiny) = tiny with inexact */
+		t = expm1(fabs(x));
+		if(ix<0x3ff00000) return h*(2.0*t-t*t/(t+one));
+		return h*(t+t/(t+one));
+	}
+
+	/* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */
+	if (ix < 0x40862E42)  return h*exp(fabs(x));
+
+	/* |x| in [log(maxdouble), overflowthresold] */
+	lx = *( (((*(unsigned*)&one)>>29)) + (unsigned*)&x);
+	if (ix<0x408633CE || ((ix==0x408633ce)&&(lx<=(unsigned)0x8fb9f87d))) {
+		w = exp(0.5*fabs(x));
+		t = h*w;
+		return t*w;
+	}
+
+	/* |x| > overflowthresold, sinh(x) overflow */
+	return x*shuge;
+}
+
 OVERLOADABLE double sqrt(double x)
 {
     double z;
diff --git a/backend/src/libocl/tmpl/ocl_math_common.tmpl.h b/backend/src/libocl/tmpl/ocl_math_common.tmpl.h
index ba246cc..a7959d3 100644
--- a/backend/src/libocl/tmpl/ocl_math_common.tmpl.h
+++ b/backend/src/libocl/tmpl/ocl_math_common.tmpl.h
@@ -55,6 +55,7 @@ OVERLOADABLE double nextafter(double x, double y);
 OVERLOADABLE double rint(double x);
 OVERLOADABLE double round(double x);
 OVERLOADABLE double sin(double x);
+OVERLOADABLE double sinh(double x);
 OVERLOADABLE double sqrt(double x);
 OVERLOADABLE double trunc(double x);
 
-- 
2.7.4