1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 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 #include <sys/isa_defs.h> 31 32 #ifdef _LITTLE_ENDIAN 33 #define HI(x) *(1+(int*)x) 34 #define LO(x) *(unsigned*)x 35 #else 36 #define HI(x) *(int*)x 37 #define LO(x) *(1+(unsigned*)x) 38 #endif 39 40 #ifdef __RESTRICT 41 #define restrict _Restrict 42 #else 43 #define restrict 44 #endif 45 46 extern const double __vlibm_TBL_sincos_hi[], __vlibm_TBL_sincos_lo[]; 47 extern int __vlibm_rem_pio2m(double *, double *, int, int, int); 48 49 static const double 50 zero = 0.0, 51 one = 1.0, 52 two24 = 16777216.0, 53 pp1 = -1.666666666605760465276263943134982554676e-0001, 54 pp2 = 8.333261209690963126718376566146180944442e-0003, 55 p1 = -1.666666666666629669805215138920301589656e-0001, 56 p2 = 8.333333332390951295683993455280336376663e-0003, 57 p3 = -1.984126237997976692791551778230098403960e-0004, 58 p4 = 2.753403624854277237649987622848330351110e-0006, 59 qq1 = -4.999999999977710986407023955908711557870e-0001, 60 qq2 = 4.166654863857219350645055881018842089580e-0002, 61 q1 = -4.999999999999931701464060878888294524481e-0001, 62 q2 = 4.166666666394861917535640593963708222319e-0002, 63 q3 = -1.388888552656142867832756687736851681462e-0003, 64 q4 = 2.478519423681460796618128289454530524759e-0005; 65 66 void 67 __vlibm_vsin_big(int n, double * restrict x, int stridex, double * restrict y, 68 int stridey, int thresh) 69 { 70 for (; n--; x += stridex, y += stridey) 71 { 72 double tx, tt[3], ty[2], t, w, z, a; 73 unsigned hx, xsb; 74 int e0, nx, j; 75 76 hx = HI(x); 77 xsb = hx & 0x80000000; 78 hx &= ~0x80000000; 79 if (hx <= thresh || hx >= 0x7ff00000) 80 continue; 81 e0 = (hx >> 20) - 1046; 82 HI(&tx) = 0x41600000 | (hx & 0xfffff); 83 LO(&tx) = LO(x); 84 tt[0] = (double)((int) tx); 85 tx = (tx - tt[0]) * two24; 86 if (tx != zero) 87 { 88 nx = 2; 89 tt[1] = (double)((int) tx); 90 tt[2] = (tx - tt[1]) * two24; 91 if (tt[2] != zero) 92 nx = 3; 93 } 94 else 95 { 96 nx = 1; 97 tt[1] = tt[2] = zero; 98 } 99 nx = __vlibm_rem_pio2m(tt, ty, e0, nx, 2); 100 if (xsb) 101 { 102 nx = -nx; 103 ty[0] = -ty[0]; 104 ty[1] = -ty[1]; 105 } 106 107 /* now nx and ty[*] are the quadrant and reduced arg */ 108 xsb = (nx & 2) << 30; 109 hx = HI(&ty[0]); 110 if (nx & 1) 111 { 112 if (hx & 0x80000000) 113 { 114 ty[0] = -ty[0]; 115 ty[1] = -ty[1]; 116 hx &= ~0x80000000; 117 } 118 if (hx < 0x3fc40000) 119 { 120 z = ty[0] * ty[0]; 121 t = z * (q1 + z * (q2 + z * (q3 + z * q4))); 122 a = one + t; 123 } 124 else 125 { 126 j = (hx + 0x4000) & 0x7fff8000; 127 HI(&t) = j; 128 LO(&t) = 0; 129 ty[0] = (ty[0] - t) + ty[1]; 130 z = ty[0] * ty[0]; 131 t = z * (qq1 + z * qq2); 132 w = ty[0] * (one + z * (pp1 + z * pp2)); 133 j = ((j - 0x3fc40000) >> 13) & ~3; 134 a = __vlibm_TBL_sincos_hi[j+1]; 135 t = __vlibm_TBL_sincos_lo[j+1] - (__vlibm_TBL_sincos_hi[j] * w - a * t); 136 a += t; 137 } 138 } 139 else 140 { 141 if (hx & 0x80000000) 142 { 143 ty[0] = -ty[0]; 144 ty[1] = -ty[1]; 145 hx &= ~0x80000000; 146 xsb ^= 0x80000000; 147 } 148 if (hx < 0x3fc90000) 149 { 150 z = ty[0] * ty[0]; 151 t = z * (p1 + z * (p2 + z * (p3 + z * p4))); 152 a = ty[0] + (ty[1] + ty[0] * t); 153 } 154 else 155 { 156 j = (hx + 0x4000) & 0x7fff8000; 157 HI(&t) = j; 158 LO(&t) = 0; 159 ty[0] = (ty[0] - t) + ty[1]; 160 z = ty[0] * ty[0]; 161 t = z * (qq1 + z * qq2); 162 w = ty[0] * (one + z * (pp1 + z * pp2)); 163 j = ((j - 0x3fc40000) >> 13) & ~3; 164 a = __vlibm_TBL_sincos_hi[j]; 165 t = (__vlibm_TBL_sincos_hi[j+1] * w + a * t) + __vlibm_TBL_sincos_lo[j]; 166 a += t; 167 } 168 } 169 if (xsb) a = -a; 170 *y = a; 171 } 172 } 173