| s_nearbyint.c (175309) | s_nearbyint.c (251024) |
|---|---|
| 1/*- 2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> |
| 28__FBSDID("$FreeBSD: head/lib/msun/src/s_nearbyint.c 175309 2008-01-14 02:12:07Z das $"); | 28__FBSDID("$FreeBSD: head/lib/msun/src/s_nearbyint.c 251024 2013-05-27 08:50:10Z das $"); |
| 29 30#include <fenv.h> 31#include <math.h> 32 33/* 34 * We save and restore the floating-point environment to avoid raising 35 * an inexact exception. We can get away with using fesetenv() 36 * instead of feclearexcept()/feupdateenv() to restore the environment 37 * because the only exception defined for rint() is overflow, and 38 * rounding can't overflow as long as emax >= p. | 29 30#include <fenv.h> 31#include <math.h> 32 33/* 34 * We save and restore the floating-point environment to avoid raising 35 * an inexact exception. We can get away with using fesetenv() 36 * instead of feclearexcept()/feupdateenv() to restore the environment 37 * because the only exception defined for rint() is overflow, and 38 * rounding can't overflow as long as emax >= p. |
| 39 * 40 * The volatile keyword is needed below because clang incorrectly assumes 41 * that rint won't raise any floating-point exceptions. Declaring ret volatile 42 * is sufficient to trick the compiler into doing the right thing. |
|
| 39 */ 40#define DECL(type, fn, rint) \ 41type \ 42fn(type x) \ 43{ \ | 43 */ 44#define DECL(type, fn, rint) \ 45type \ 46fn(type x) \ 47{ \ |
| 44 type ret; \ | 48 volatile type ret; \ |
| 45 fenv_t env; \ 46 \ 47 fegetenv(&env); \ 48 ret = rint(x); \ 49 fesetenv(&env); \ 50 return (ret); \ 51} 52 53DECL(double, nearbyint, rint) 54DECL(float, nearbyintf, rintf) 55DECL(long double, nearbyintl, rintl) | 49 fenv_t env; \ 50 \ 51 fegetenv(&env); \ 52 ret = rint(x); \ 53 fesetenv(&env); \ 54 return (ret); \ 55} 56 57DECL(double, nearbyint, rint) 58DECL(float, nearbyintf, rintf) 59DECL(long double, nearbyintl, rintl) |