upload sdk

git-svn-id: svn://kolibrios.org@4349 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/math/f_rint.c

@@ -0,0 +1,67 @@
+/*
+ * ====================================================
+ * x87 FP implementation contributed to Newlib by
+ * Dave Korn, November 2007.  This file is placed in the
+ * public domain.  Permission to use, copy, modify, and 
+ * distribute this software is freely granted.
+ * ====================================================
+ */
+
+#if defined(__GNUC__) && !defined(_SOFT_FLOAT)
+
+#include <math.h>
+
+/*
+FUNCTION
+<<rint>>, <<rintf>>, <<rintl>>---round to integer
+INDEX
+	rint
+INDEX
+	rintf
+INDEX
+	rintl
+
+ANSI_SYNOPSIS
+	#include <math.h>
+	double rint(double x);
+        float rintf(float x);
+        long double rintl(long double x);
+
+TRAD_SYNOPSIS
+	ANSI-only.
+
+DESCRIPTION
+The <<rint>>, <<rintf>> and <<rintl>> functions round <[x]> to an integer value
+in floating-point format, using the current rounding direction.  They may
+raise the inexact exception if the result differs in value from the argument.
+
+RETURNS
+These functions return the rounded integer value of <[x]>.
+
+PORTABILITY
+<<rint>>, <<rintf>> and <<rintl>> are ANSI.
+<<rint>> and <<rintf>> are available on all platforms.
+<<rintl>> is only available on i386 platforms when hardware 
+floating point support is available and when compiling with GCC.
+
+*/
+
+/*
+ * Fast math version of rint(x)
+ * Return x rounded to integral value according to the prevailing
+ * rounding mode.
+ * Method:
+ *	Using inline x87 asms.
+ * Exception:
+ *	Governed by x87 FPCR.
+ */
+
+double _f_rint (double x)
+{
+  double _result;
+  asm ("frndint" : "=t" (_result) : "0" (x));
+  return _result;
+}
+
+#endif  /* !__GNUC__ || _SOFT_FLOAT */
+