upload sdk

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

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

@@ -0,0 +1,69 @@
+/*
+ * ====================================================
+ * 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
+<<lrint>>, <<lrintf>>, <<lrintl>>---round and convert to long integer
+INDEX
+	lrint
+INDEX
+	lrintf
+INDEX
+	lrintl
+
+ANSI_SYNOPSIS
+	#include <math.h>
+	long int lrint(double x);
+        long int lrintf(float x);
+        long int lrintl(long double x);
+
+TRAD_SYNOPSIS
+	ANSI-only.
+
+DESCRIPTION
+The <<lrint>>, <<lrintf>> and <<lrintl>> functions round <[x]> to the nearest integer value,
+according to the current rounding direction. If the rounded value is outside the
+range of the return type, the numeric result is unspecified. A range error may 
+occur if the magnitude of <[x]> is too large.
+
+RETURNS
+These functions return the rounded integer value of <[x]>.
+<<lrint>>, <<lrintf>> and <<lrintl>> return the result as a long integer.
+
+PORTABILITY
+<<lrint>>, <<lrintf>>, and <<lrintl>> are ANSI.
+<<lrint>> and <<lrintf>> are available on all platforms.
+<<lrintl>> is only available on i386 platforms when hardware 
+floating point support is available and when compiling with GCC.
+
+*/
+
+/*
+ * Fast math version of lrint(x)
+ * Return x rounded to integral value according to the prevailing
+ * rounding mode.
+ * Method:
+ *	Using inline x87 asms.
+ * Exception:
+ *	Governed by x87 FPCR.
+ */
+
+long int _f_lrint (double x)
+{
+  long int _result;
+  asm ("fistpl %0" : "=m" (_result) : "t" (x) : "st");
+  return _result;
+}
+
+#endif  /* !__GNUC__ || _SOFT_FLOAT */
+