micropython: add micropython component

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

@@ -0,0 +1,52 @@
+/*
+ * 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_ldexp.c -- float version of s_ldexp.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 ldexpf(float value, int exp)
+#else
+	float ldexpf(value, exp)
+	float value; int exp;
+#endif
+{
+	if(!isfinite(value)||value==(float)0.0) return value;
+	value = scalbnf(value,exp);
+	//if(!finitef(value)||value==(float)0.0) errno = ERANGE;
+	return value;
+}
+
+#ifdef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double ldexp(double value, int exp)
+#else
+	double ldexp(value, exp)
+	double value; int exp;
+#endif
+{
+	return (double) ldexpf((float) value, exp);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */