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e_fmod.c (117912) e_fmod.c (141296)
1/* @(#)e_fmod.c 5.1 93/09/24 */
1
2/* @(#)e_fmod.c 1.3 95/01/18 */
2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
3/*
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Developed at SunSoft, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
11 */
12
13#ifndef lint
10 * is preserved.
11 * ====================================================
12 */
13
14#ifndef lint
14static char rcsid[] = "$FreeBSD: head/lib/msun/src/e_fmod.c 117912 2003-07-23 04:53:47Z peter $";
15static char rcsid[] = "$FreeBSD: head/lib/msun/src/e_fmod.c 141296 2005-02-04 18:26:06Z das $";
15#endif
16
16#endif
17
17/*
18/*
18 * __ieee754_fmod(x,y)
19 * Return x mod y in exact arithmetic
20 * Method: shift and subtract
21 */
22
23#include "math.h"
24#include "math_private.h"
25

--- 12 unchanged lines hidden (view full) ---

38 hy &= 0x7fffffff; /* |y| */
39
40 /* purge off exception values */
41 if((hy|ly)==0||(hx>=0x7ff00000)|| /* y=0,or x not finite */
42 ((hy|((ly|-ly)>>31))>0x7ff00000)) /* or y is NaN */
43 return (x*y)/(x*y);
44 if(hx<=hy) {
45 if((hx<hy)||(lx<ly)) return x; /* |x|<|y| return x */
19 * __ieee754_fmod(x,y)
20 * Return x mod y in exact arithmetic
21 * Method: shift and subtract
22 */
23
24#include "math.h"
25#include "math_private.h"
26

--- 12 unchanged lines hidden (view full) ---

39 hy &= 0x7fffffff; /* |y| */
40
41 /* purge off exception values */
42 if((hy|ly)==0||(hx>=0x7ff00000)|| /* y=0,or x not finite */
43 ((hy|((ly|-ly)>>31))>0x7ff00000)) /* or y is NaN */
44 return (x*y)/(x*y);
45 if(hx<=hy) {
46 if((hx<hy)||(lx<ly)) return x; /* |x|<|y| return x */
46 if(lx==ly)
47 if(lx==ly)
47 return Zero[(u_int32_t)sx>>31]; /* |x|=|y| return x*0*/
48 }
49
50 /* determine ix = ilogb(x) */
51 if(hx<0x00100000) { /* subnormal x */
52 if(hx==0) {
53 for (ix = -1043, i=lx; i>0; i<<=1) ix -=1;
54 } else {

--- 6 unchanged lines hidden (view full) ---

61 if(hy==0) {
62 for (iy = -1043, i=ly; i>0; i<<=1) iy -=1;
63 } else {
64 for (iy = -1022,i=(hy<<11); i>0; i<<=1) iy -=1;
65 }
66 } else iy = (hy>>20)-1023;
67
68 /* set up {hx,lx}, {hy,ly} and align y to x */
48 return Zero[(u_int32_t)sx>>31]; /* |x|=|y| return x*0*/
49 }
50
51 /* determine ix = ilogb(x) */
52 if(hx<0x00100000) { /* subnormal x */
53 if(hx==0) {
54 for (ix = -1043, i=lx; i>0; i<<=1) ix -=1;
55 } else {

--- 6 unchanged lines hidden (view full) ---

62 if(hy==0) {
63 for (iy = -1043, i=ly; i>0; i<<=1) iy -=1;
64 } else {
65 for (iy = -1022,i=(hy<<11); i>0; i<<=1) iy -=1;
66 }
67 } else iy = (hy>>20)-1023;
68
69 /* set up {hx,lx}, {hy,ly} and align y to x */
69 if(ix >= -1022)
70 if(ix >= -1022)
70 hx = 0x00100000|(0x000fffff&hx);
71 else { /* subnormal x, shift x to normal */
72 n = -1022-ix;
73 if(n<=31) {
74 hx = (hx<<n)|(lx>>(32-n));
75 lx <<= n;
76 } else {
77 hx = lx<<(n-32);
78 lx = 0;
79 }
80 }
71 hx = 0x00100000|(0x000fffff&hx);
72 else { /* subnormal x, shift x to normal */
73 n = -1022-ix;
74 if(n<=31) {
75 hx = (hx<<n)|(lx>>(32-n));
76 lx <<= n;
77 } else {
78 hx = lx<<(n-32);
79 lx = 0;
80 }
81 }
81 if(iy >= -1022)
82 if(iy >= -1022)
82 hy = 0x00100000|(0x000fffff&hy);
83 else { /* subnormal y, shift y to normal */
84 n = -1022-iy;
85 if(n<=31) {
86 hy = (hy<<n)|(ly>>(32-n));
87 ly <<= n;
88 } else {
89 hy = ly<<(n-32);

--- 43 unchanged lines hidden --- 		83 hy = 0x00100000|(0x000fffff&hy);
84 else { /* subnormal y, shift y to normal */
85 n = -1022-iy;
86 if(n<=31) {
87 hy = (hy<<n)|(ly>>(32-n));
88 ly <<= n;
89 } else {
90 hy = ly<<(n-32);

--- 43 unchanged lines hidden ---