| e_acos.c (21673) | e_acos.c (22808) |
|---|---|
| 1/* @(#)e_acos.c 5.1 93/09/24 */ 2/* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13#ifndef lint | 1/* @(#)e_acos.c 5.1 93/09/24 */ 2/* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13#ifndef lint |
| 14static char rcsid[] = "$FreeBSD: head/lib/msun/src/e_acos.c 21673 1997-01-14 07:20:47Z jkh $"; | 14static char rcsid[] = "$FreeBSD: head/lib/msun/src/e_acos.c 22808 1997-02-16 18:26:31Z bde $"; |
| 15#endif 16 17/* __ieee754_acos(x) 18 * Method : 19 * acos(x) = pi/2 - asin(x) 20 * acos(-x) = pi/2 + asin(x) 21 * For |x|<=0.5 22 * acos(x) = pi/2 - (x + x*x^2*R(x^2)) (see asin.c) --- 34 unchanged lines hidden (view full) --- 57pS4 = 7.91534994289814532176e-04, /* 0x3F49EFE0, 0x7501B288 */ 58pS5 = 3.47933107596021167570e-05, /* 0x3F023DE1, 0x0DFDF709 */ 59qS1 = -2.40339491173441421878e+00, /* 0xC0033A27, 0x1C8A2D4B */ 60qS2 = 2.02094576023350569471e+00, /* 0x40002AE5, 0x9C598AC8 */ 61qS3 = -6.88283971605453293030e-01, /* 0xBFE6066C, 0x1B8D0159 */ 62qS4 = 7.70381505559019352791e-02; /* 0x3FB3B8C5, 0xB12E9282 */ 63 64#ifdef __STDC__ | 15#endif 16 17/* __ieee754_acos(x) 18 * Method : 19 * acos(x) = pi/2 - asin(x) 20 * acos(-x) = pi/2 + asin(x) 21 * For |x|<=0.5 22 * acos(x) = pi/2 - (x + x*x^2*R(x^2)) (see asin.c) --- 34 unchanged lines hidden (view full) --- 57pS4 = 7.91534994289814532176e-04, /* 0x3F49EFE0, 0x7501B288 */ 58pS5 = 3.47933107596021167570e-05, /* 0x3F023DE1, 0x0DFDF709 */ 59qS1 = -2.40339491173441421878e+00, /* 0xC0033A27, 0x1C8A2D4B */ 60qS2 = 2.02094576023350569471e+00, /* 0x40002AE5, 0x9C598AC8 */ 61qS3 = -6.88283971605453293030e-01, /* 0xBFE6066C, 0x1B8D0159 */ 62qS4 = 7.70381505559019352791e-02; /* 0x3FB3B8C5, 0xB12E9282 */ 63 64#ifdef __STDC__ |
| 65 double __ieee754_acos(double x) | 65 double __generic___ieee754_acos(double x) |
| 66#else | 66#else |
| 67 double __ieee754_acos(x) | 67 double __generic___ieee754_acos(x) |
| 68 double x; 69#endif 70{ 71 double z,p,q,r,w,s,c,df; 72 int32_t hx,ix; 73 GET_HIGH_WORD(hx,x); 74 ix = hx&0x7fffffff; 75 if(ix>=0x3ff00000) { /* |x| >= 1 */ --- 36 unchanged lines hidden --- | 68 double x; 69#endif 70{ 71 double z,p,q,r,w,s,c,df; 72 int32_t hx,ix; 73 GET_HIGH_WORD(hx,x); 74 ix = hx&0x7fffffff; 75 if(ix>=0x3ff00000) { /* |x| >= 1 */ --- 36 unchanged lines hidden --- |