Fix whitespace issue.
[glibc.git] / sysdeps / ieee754 / ldbl-96 / e_remainderl.c
blobe721a6e8cdff659d504af0900f962d02d94b0d5e
1 /* e_remainderl.c -- long double version of e_remainder.c.
2 * Conversion to long double by Ulrich Drepper,
3 * Cygnus Support, drepper@cygnus.com.
4 */
6 /*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
17 #if defined(LIBM_SCCS) && !defined(lint)
18 static char rcsid[] = "$NetBSD: $";
19 #endif
21 /* __ieee754_remainderl(x,p)
22 * Return :
23 * returns x REM p = x - [x/p]*p as if in infinite
24 * precise arithmetic, where [x/p] is the (infinite bit)
25 * integer nearest x/p (in half way case choose the even one).
26 * Method :
27 * Based on fmod() return x-[x/p]chopped*p exactlp.
30 #include "math.h"
31 #include "math_private.h"
33 #ifdef __STDC__
34 static const long double zero = 0.0;
35 #else
36 static long double zero = 0.0;
37 #endif
40 #ifdef __STDC__
41 long double __ieee754_remainderl(long double x, long double p)
42 #else
43 long double __ieee754_remainderl(x,p)
44 long double x,p;
45 #endif
47 u_int32_t sx,sex,sep,x0,x1,p0,p1;
48 long double p_half;
50 GET_LDOUBLE_WORDS(sex,x0,x1,x);
51 GET_LDOUBLE_WORDS(sep,p0,p1,p);
52 sx = sex&0x8000;
53 sep &= 0x7fff;
54 sex &= 0x7fff;
56 /* purge off exception values */
57 if((sep|p0|p1)==0) return (x*p)/(x*p); /* p = 0 */
58 if((sex==0x7fff)|| /* x not finite */
59 ((sep==0x7fff)&& /* p is NaN */
60 ((p0|p1)!=0)))
61 return (x*p)/(x*p);
64 if (sep<0x7ffe) x = __ieee754_fmodl(x,p+p); /* now x < 2p */
65 if (((sex-sep)|(x0-p0)|(x1-p1))==0) return zero*x;
66 x = fabsl(x);
67 p = fabsl(p);
68 if (sep<0x0002) {
69 if(x+x>p) {
70 x-=p;
71 if(x+x>=p) x -= p;
73 } else {
74 p_half = 0.5*p;
75 if(x>p_half) {
76 x-=p;
77 if(x>=p_half) x -= p;
80 GET_LDOUBLE_EXP(sex,x);
81 SET_LDOUBLE_EXP(x,sex^sx);
82 return x;