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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/isa_defs.h>
#ifdef _LITTLE_ENDIAN
#define HI(x) *(1+(int*)x)
#define LO(x) *(unsigned*)x
#else
#define HI(x) *(int*)x
#define LO(x) *(1+(unsigned*)x)
#endif
#ifdef __RESTRICT
#define restrict _Restrict
#else
#define restrict
#endif
extern const double __vlibm_TBL_sincos_hi[], __vlibm_TBL_sincos_lo[];
extern int __vlibm_rem_pio2m(double *, double *, int, int, int);
static const double
zero = 0.0,
one = 1.0,
two24 = 16777216.0,
pp1 = -1.666666666605760465276263943134982554676e-0001,
pp2 = 8.333261209690963126718376566146180944442e-0003,
p1 = -1.666666666666629669805215138920301589656e-0001,
p2 = 8.333333332390951295683993455280336376663e-0003,
p3 = -1.984126237997976692791551778230098403960e-0004,
p4 = 2.753403624854277237649987622848330351110e-0006,
qq1 = -4.999999999977710986407023955908711557870e-0001,
qq2 = 4.166654863857219350645055881018842089580e-0002,
q1 = -4.999999999999931701464060878888294524481e-0001,
q2 = 4.166666666394861917535640593963708222319e-0002,
q3 = -1.388888552656142867832756687736851681462e-0003,
q4 = 2.478519423681460796618128289454530524759e-0005;
void
__vlibm_vcos_big(int n, double * restrict x, int stridex, double * restrict y,
int stridey, int thresh)
{
for (; n--; x += stridex, y += stridey)
{
double tx, tt[3], ty[2], t, w, z, a;
unsigned hx, xsb;
int e0, nx, j;
hx = HI(x);
xsb = hx & 0x80000000;
hx &= ~0x80000000;
if (hx <= thresh || hx >= 0x7ff00000)
continue;
e0 = (hx >> 20) - 1046;
HI(&tx) = 0x41600000 | (hx & 0xfffff);
LO(&tx) = LO(x);
tt[0] = (double)((int) tx);
tx = (tx - tt[0]) * two24;
if (tx != zero)
{
nx = 2;
tt[1] = (double)((int) tx);
tt[2] = (tx - tt[1]) * two24;
if (tt[2] != zero)
nx = 3;
}
else
{
nx = 1;
tt[1] = tt[2] = zero;
}
nx = __vlibm_rem_pio2m(tt, ty, e0, nx, 2);
if (xsb)
{
nx = -nx;
ty[0] = -ty[0];
ty[1] = -ty[1];
}
nx = (nx + 1) & 3; /* Add 1 to turn sin into cos */
/* now nx and ty[*] are the quadrant and reduced arg */
xsb = (nx & 2) << 30;
hx = HI(&ty[0]);
if (nx & 1)
{
if (hx & 0x80000000)
{
ty[0] = -ty[0];
ty[1] = -ty[1];
hx &= ~0x80000000;
}
if (hx < 0x3fc40000)
{
z = ty[0] * ty[0];
t = z * (q1 + z * (q2 + z * (q3 + z * q4)));
a = one + t;
}
else
{
j = (hx + 0x4000) & 0x7fff8000;
HI(&t) = j;
LO(&t) = 0;
ty[0] = (ty[0] - t) + ty[1];
z = ty[0] * ty[0];
t = z * (qq1 + z * qq2);
w = ty[0] * (one + z * (pp1 + z * pp2));
j = ((j - 0x3fc40000) >> 13) & ~3;
a = __vlibm_TBL_sincos_hi[j+1];
t = __vlibm_TBL_sincos_lo[j+1] - (__vlibm_TBL_sincos_hi[j] * w - a * t);
a += t;
}
}
else
{
if (hx & 0x80000000)
{
ty[0] = -ty[0];
ty[1] = -ty[1];
hx &= ~0x80000000;
xsb ^= 0x80000000;
}
if (hx < 0x3fc90000)
{
z = ty[0] * ty[0];
t = z * (p1 + z * (p2 + z * (p3 + z * p4)));
a = ty[0] + (ty[1] + ty[0] * t);
}
else
{
j = (hx + 0x4000) & 0x7fff8000;
HI(&t) = j;
LO(&t) = 0;
ty[0] = (ty[0] - t) + ty[1];
z = ty[0] * ty[0];
t = z * (qq1 + z * qq2);
w = ty[0] * (one + z * (pp1 + z * pp2));
j = ((j - 0x3fc40000) >> 13) & ~3;
a = __vlibm_TBL_sincos_hi[j];
t = (__vlibm_TBL_sincos_hi[j+1] * w + a * t) + __vlibm_TBL_sincos_lo[j];
a += t;
}
}
if (xsb) a = -a;
*y = a;
}
}
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