```5261 libm should stop using synonyms.h
 ``` `````` 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 */ 25 /* 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma weak acos = __acos 31 32 /* INDENT OFF */ 33 /* 34 * acos(x) 35 * Method : 36 * acos(x) = pi/2 - asin(x) 37 * acos(-x) = pi/2 + asin(x) 38 * For |x|<=0.5 39 * acos(x) = pi/2 - (x + x*x^2*R(x^2)) (see asin.c) 40 * For x>0.5 41 * acos(x) = pi/2 - (pi/2 - 2asin(sqrt((1-x)/2))) 42 * = 2asin(sqrt((1-x)/2)) 43 * = 2s + 2s*z*R(z) ...z=(1-x)/2, s=sqrt(z) 44 * = 2f + (2c + 2s*z*R(z)) 45 * where f=hi part of s, and c = (z-f*f)/(s+f) is the correction term 46 * for f so that f+c ~ sqrt(z). 47 * For x<-0.5 48 * acos(x) = pi - 2asin(sqrt((1-|x|)/2)) 49 * = pi - 0.5*(s+s*z*R(z)), where z=(1-|x|)/2,s=sqrt(z) 50 * 51 * Special cases: 52 * if x is NaN, return x itself; 53 * if |x|>1, return NaN with invalid signal. 54 * 55 * Function needed: sqrt 56 */ 57 /* INDENT ON */ 58 59 #include "libm_synonyms.h" /* __acos, __sqrt, __isnan */ 60 #include "libm_protos.h" /* _SVID_libm_error */ 61 #include "libm_macros.h" 62 #include 63 64 /* INDENT OFF */ 65 static const double xxx[] = { 66 /* one */ 1.00000000000000000000e+00, /* 3FF00000, 00000000 */ 67 /* pi */ 3.14159265358979311600e+00, /* 400921FB, 54442D18 */ 68 /* pio2_hi */ 1.57079632679489655800e+00, /* 3FF921FB, 54442D18 */ 69 /* pio2_lo */ 6.12323399573676603587e-17, /* 3C91A626, 33145C07 */ 70 /* pS0 */ 1.66666666666666657415e-01, /* 3FC55555, 55555555 */ 71 /* pS1 */ -3.25565818622400915405e-01, /* BFD4D612, 03EB6F7D */ 72 /* pS2 */ 2.01212532134862925881e-01, /* 3FC9C155, 0E884455 */ 73 /* pS3 */ -4.00555345006794114027e-02, /* BFA48228, B5688F3B */ 74 /* pS4 */ 7.91534994289814532176e-04, /* 3F49EFE0, 7501B288 */ 75 /* pS5 */ 3.47933107596021167570e-05, /* 3F023DE1, 0DFDF709 */ 76 /* qS1 */ -2.40339491173441421878e+00, /* C0033A27, 1C8A2D4B */ 77 /* qS2 */ 2.02094576023350569471e+00, /* 40002AE5, 9C598AC8 */ 78 /* qS3 */ -6.88283971605453293030e-01, /* BFE6066C, 1B8D0159 */ 79 /* qS4 */ 7.70381505559019352791e-02 /* 3FB3B8C5, B12E9282 */ ``` ``` `````` 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 */ 25 /* 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma weak __acos = acos 31 32 /* INDENT OFF */ 33 /* 34 * acos(x) 35 * Method : 36 * acos(x) = pi/2 - asin(x) 37 * acos(-x) = pi/2 + asin(x) 38 * For |x|<=0.5 39 * acos(x) = pi/2 - (x + x*x^2*R(x^2)) (see asin.c) 40 * For x>0.5 41 * acos(x) = pi/2 - (pi/2 - 2asin(sqrt((1-x)/2))) 42 * = 2asin(sqrt((1-x)/2)) 43 * = 2s + 2s*z*R(z) ...z=(1-x)/2, s=sqrt(z) 44 * = 2f + (2c + 2s*z*R(z)) 45 * where f=hi part of s, and c = (z-f*f)/(s+f) is the correction term 46 * for f so that f+c ~ sqrt(z). 47 * For x<-0.5 48 * acos(x) = pi - 2asin(sqrt((1-|x|)/2)) 49 * = pi - 0.5*(s+s*z*R(z)), where z=(1-|x|)/2,s=sqrt(z) 50 * 51 * Special cases: 52 * if x is NaN, return x itself; 53 * if |x|>1, return NaN with invalid signal. 54 * 55 * Function needed: sqrt 56 */ 57 /* INDENT ON */ 58 59 #include "libm_protos.h" /* _SVID_libm_error */ 60 #include "libm_macros.h" 61 #include 62 63 /* INDENT OFF */ 64 static const double xxx[] = { 65 /* one */ 1.00000000000000000000e+00, /* 3FF00000, 00000000 */ 66 /* pi */ 3.14159265358979311600e+00, /* 400921FB, 54442D18 */ 67 /* pio2_hi */ 1.57079632679489655800e+00, /* 3FF921FB, 54442D18 */ 68 /* pio2_lo */ 6.12323399573676603587e-17, /* 3C91A626, 33145C07 */ 69 /* pS0 */ 1.66666666666666657415e-01, /* 3FC55555, 55555555 */ 70 /* pS1 */ -3.25565818622400915405e-01, /* BFD4D612, 03EB6F7D */ 71 /* pS2 */ 2.01212532134862925881e-01, /* 3FC9C155, 0E884455 */ 72 /* pS3 */ -4.00555345006794114027e-02, /* BFA48228, B5688F3B */ 73 /* pS4 */ 7.91534994289814532176e-04, /* 3F49EFE0, 7501B288 */ 74 /* pS5 */ 3.47933107596021167570e-05, /* 3F023DE1, 0DFDF709 */ 75 /* qS1 */ -2.40339491173441421878e+00, /* C0033A27, 1C8A2D4B */ 76 /* qS2 */ 2.02094576023350569471e+00, /* 40002AE5, 9C598AC8 */ 77 /* qS3 */ -6.88283971605453293030e-01, /* BFE6066C, 1B8D0159 */ 78 /* qS4 */ 7.70381505559019352791e-02 /* 3FB3B8C5, B12E9282 */ ```