1 /*
2 Copyright (c) 2007 Dave Korn
3
4
5 x87 FP implementation contributed to Newlib by
6 Dave Korn, November 2007. This file is placed in the
7 public domain. Permission to use, copy, modify, and
8 distribute this software is freely granted.
9 */
10 /*
11 * ====================================================
12 * x87 FP implementation contributed to Newlib by
13 * Dave Korn, November 2007. This file is placed in the
14 * public domain. Permission to use, copy, modify, and
15 * distribute this software is freely granted.
16 * ====================================================
17 */
18
19 #if defined(__GNUC__) && !defined(_SOFT_FLOAT)
20
21 #include <math.h>
22
23 /*
24 * Fast math version of lrintf(x)
25 * Return x rounded to integral value according to the prevailing
26 * rounding mode.
27 * Method:
28 * Using inline x87 asms.
29 * Exception:
30 * Governed by x87 FPCR.
31 */
32
_f_lrintf(float x)33 long int _f_lrintf (float x)
34 {
35 long int _result;
36 __asm__("fistpl %0" : "=m" (_result) : "t" (x) : "st");
37 return _result;
38 }
39
40 #endif /* !__GNUC__ || _SOFT_FLOAT */
41
42
