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/*

 * ====================================================

 * 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 */