micropython: add micropython component

components/language/micropython/lib/libm/sf_sin.c

@@ -0,0 +1,71 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * These math functions are taken from newlib-nano-2, the newlib/libm/math
+ * directory, available from https://github.com/32bitmicro/newlib-nano-2.
+ *
+ * Appropriate copyright headers are reproduced below.
+ */
+
+/* sf_sin.c -- float version of s_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 "fdlibm.h"
+
+#ifdef __STDC__
+	float sinf(float x)
+#else
+	float sinf(x)
+	float x;
+#endif
+{
+	float y[2],z=0.0;
+	__int32_t n,ix;
+
+	GET_FLOAT_WORD(ix,x);
+
+    /* |x| ~< pi/4 */
+	ix &= 0x7fffffff;
+	if(ix <= 0x3f490fd8) return __kernel_sinf(x,z,0);
+
+    /* sin(Inf or NaN) is NaN */
+	else if (!FLT_UWORD_IS_FINITE(ix)) return x-x;
+
+    /* argument reduction needed */
+	else {
+	    n = __ieee754_rem_pio2f(x,y);
+	    switch(n&3) {
+		case 0: return  __kernel_sinf(y[0],y[1],1);
+		case 1: return  __kernel_cosf(y[0],y[1]);
+		case 2: return -__kernel_sinf(y[0],y[1],1);
+		default:
+			return -__kernel_cosf(y[0],y[1]);
+	    }
+	}
+}
+
+#ifdef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double sin(double x)
+#else
+	double sin(x)
+	double x;
+#endif
+{
+	return (double) sinf((float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */