initial check-in, version 0.5.0 v0.5.0

1 files changed, 42 insertions, 0 deletions

diff --git a/src/math/k_sinf.c b/src/math/k_sinf.c
new file mode 100644
index 00000000..617f6148
--- /dev/null
+++ b/src/math/k_sinf.c
@@ -0,0 +1,42 @@
+/* k_sinf.c -- float version of k_sin.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.
+ * ====================================================
+ */
+
+#include <math.h>
+#include "math_private.h"
+
+static const float
+half =  5.0000000000e-01,/* 0x3f000000 */
+S1  = -1.6666667163e-01, /* 0xbe2aaaab */
+S2  =  8.3333337680e-03, /* 0x3c088889 */
+S3  = -1.9841270114e-04, /* 0xb9500d01 */
+S4  =  2.7557314297e-06, /* 0x3638ef1b */
+S5  = -2.5050759689e-08, /* 0xb2d72f34 */
+S6  =  1.5896910177e-10; /* 0x2f2ec9d3 */
+
+float
+__kernel_sinf(float x, float y, int iy)
+{
+        float z,r,v;
+        int32_t ix;
+        GET_FLOAT_WORD(ix,x);
+        ix &= 0x7fffffff;                       /* high word of x */
+        if(ix<0x32000000)                       /* |x| < 2**-27 */
+           {if((int)x==0) return x;}            /* generate inexact */
+        z       =  x*x;
+        v       =  z*x;
+        r       =  S2+z*(S3+z*(S4+z*(S5+z*S6)));
+        if(iy==0) return x+v*(S1+z*r);
+        else      return x-((z*(half*y-v*r)-y)-v*S1);
+}