Import newlib and create makefile

1 files changed, 92 insertions, 0 deletions

diff --git a/newlib/libm/mathfp/s_floor.c b/newlib/libm/mathfp/s_floor.c
new file mode 100644
index 0000000..0dbc207
--- /dev/null
+++ b/newlib/libm/mathfp/s_floor.c
@@ -0,0 +1,92 @@
+
+/* @(#)z_floor.c 1.0 98/08/13 */
+
+/*
+FUNCTION
+<<floor>>, <<floorf>>, <<ceil>>, <<ceilf>>---floor and ceiling
+INDEX
+        floor
+INDEX
+        floorf
+INDEX
+        ceil
+INDEX
+        ceilf
+
+ANSI_SYNOPSIS
+        #include <math.h>
+        double floor(double <[x]>);
+        float floorf(float <[x]>);
+        double ceil(double <[x]>);
+        float ceilf(float <[x]>);
+
+TRAD_SYNOPSIS
+        #include <math.h>
+        double floor(<[x]>)
+        double <[x]>;
+        float floorf(<[x]>)
+        float <[x]>;
+        double ceil(<[x]>)
+        double <[x]>;
+        float ceilf(<[x]>)
+        float <[x]>;
+
+DESCRIPTION
+<<floor>> and <<floorf>> find
+@tex
+$\lfloor x \rfloor$,
+@end tex
+the nearest integer less than or equal to <[x]>.
+<<ceil>> and <<ceilf>> find
+@tex
+$\lceil x\rceil$,
+@end tex
+the nearest integer greater than or equal to <[x]>.
+
+RETURNS
+<<floor>> and <<ceil>> return the integer result as a double.
+<<floorf>> and <<ceilf>> return the integer result as a float.
+
+PORTABILITY
+<<floor>> and <<ceil>> are ANSI.
+<<floorf>> and <<ceilf>> are extensions.
+
+*/
+
+/*****************************************************************
+ * floor 
+ *
+ * Input:
+ *   x  - floating point value
+ *
+ * Output:
+ *   Smallest integer less than x.
+ *
+ * Description:
+ *   This routine returns the smallest integer less than x.
+ *
+ *****************************************************************/
+
+#include "fdlibm.h"
+#include "zmath.h"
+
+#ifndef _DOUBLE_IS_32BITS
+
+double 
+_DEFUN (floor, (double),
+              double x)
+{
+  double f, y;
+
+  if (x > -1.0 && x < 1.0)
+    return (x >= 0 ? 0 : -1.0);
+
+  y = modf (x, &f);
+
+  if (y == 0.0)
+    return (x);
+
+  return (x >= 0 ? f : f - 1.0);
+}
+
+#endif /* _DOUBLE_IS_32BITS */