1 files changed, 68 insertions, 0 deletions
diff --git a/newlib/libm/mathfp/s_log10.c b/newlib/libm/mathfp/s_log10.c
new file mode 100644
index 00000000000..080cecd81a8
--- /dev/null
+++ b/newlib/libm/mathfp/s_log10.c
@@ -0,0 +1,68 @@
+
+/* @(#)z_log10.c 1.0 98/08/13 */
+/******************************************************************
+ * Logarithm
+ *
+ * Input:
+ *   x - floating point value
+ *
+ * Output:
+ *   logarithm of x
+ *
+ * Description:
+ *   This routine returns the logarithm of x (base 10).
+ *
+ *****************************************************************/
+
+/*
+FUNCTION
+        <<log10>>, <<log10f>>---base 10 logarithms
+
+INDEX
+log10
+INDEX
+log10f
+
+ANSI_SYNOPSIS
+        #include <math.h>
+        double log10(double <[x]>);
+        float log10f(float <[x]>);
+
+TRAD_SYNOPSIS
+        #include <math.h>
+        double log10(<[x]>)
+        double <[x]>;
+
+        float log10f(<[x]>)
+        float <[x]>;
+
+DESCRIPTION
+<<log10>> returns the base 10 logarithm of <[x]>.
+It is implemented as <<log(<[x]>) / log(10)>>.
+
+<<log10f>> is identical, save that it takes and returns <<float>> values.
+
+RETURNS
+<<log10>> and <<log10f>> return the calculated value.
+
+See the description of <<log>> for information on errors.
+
+PORTABILITY
+<<log10>> is ANSI C.  <<log10f>> is an extension.
+
+*/
+
+
+#include "fdlibm.h"
+#include "zmath.h"
+
+#ifndef _DOUBLE_IS_32BITS
+
+double
+_DEFUN (log10, (double),
+        double x)
+{
+  return (logarithm (x, 1));
+}
+
+#endif /* _DOUBLE_IS_32BITS */