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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "../imf.h"
#pragma OPENCL FP_CONTRACT OFF
typedef struct
{
unsigned long SgnBit;
unsigned long OneHalf;
unsigned long SmallNorm;
unsigned long dRsqrtMsk;
unsigned long MOne;
unsigned long HalfMask;
unsigned long Two;
unsigned long sqrt_coeff[4];
unsigned long poly_coeff[12];
unsigned long InvPiH;
unsigned long InvPiL;
unsigned long One;
unsigned long InvPi;
unsigned long SgnMask;
unsigned long ep_coeff[6];
unsigned long dInfs[2];
unsigned long dOnes[2];
unsigned long dZeros[2];
} __internal_dacospi_la_data_t;
static __constant __internal_dacospi_la_data_t __internal_dacospi_la_data = {
0x8000000000000000uL, 0x3fe0000000000000uL, 0x3000000000000000uL, 0xffffff0000000000uL, 0xbff0000000000000uL, 0xfffffffffc000000uL,
0x4000000000000000uL, {
0xbf918000993B24C3uL, 0x3fa400006F70D42DuL, 0xbfb7FFFFFFFFFE97uL, 0x3fcFFFFFFFFFFF9DuL}
, {
0x3f84F4523BC020D8uL, 0xbf759EE439EEE799uL, 0x3f79C78AE09A5457uL, 0x3f60C57DF579794AuL, 0x3f6FCBA466EA069BuL, 0x3f7219262ADC70A8uL,
0x3f76A256C108AAEduL, 0x3f7D2B0EA1978F74uL, 0x3f83CE53573AD4F4uL, 0x3f8D1A452B1C8F4EuL, 0x3f98723A1D5E7F21uL, 0x3faB2995E7B7B28BuL}
, 0x3fd45F3070000000uL, 0xbe21B1BBEA2AAEE4uL, 0x3ff0000000000000uL, 0x3fd45F306DC9C883uL, 0x8000000000000000uL, {
0x3f88BAFFDA4549F0uL,
0x3f7262B57524FB3BuL,
0x3f84CD955BDDED9fuL,
0x3f8D02B66C2AD236uL,
0x3f9872BCE76EFA44uL,
0x3faB2994D916CB05uL}
, {0x7ff0000000000000uL, 0xfff0000000000000uL}
, {0x3ff0000000000000uL, 0xbff0000000000000uL}
, {0x0000000000000000uL, 0x8000000000000000uL}
};
static __constant int_double __dacospi_la_c12 = { 0x3f84f45239939e37UL };
static __constant int_double __dacospi_la_c11 = { 0xbf759ee4331f54b9UL };
static __constant int_double __dacospi_la_c10 = { 0x3f79c78adbe84367UL };
static __constant int_double __dacospi_la_c9 = { 0x3f60c57df93896daUL };
static __constant int_double __dacospi_la_c8 = { 0x3f6fcba465f52565UL };
static __constant int_double __dacospi_la_c7 = { 0x3f7219262af154f1UL };
static __constant int_double __dacospi_la_c6 = { 0x3f76a256c10640a7UL };
static __constant int_double __dacospi_la_c5 = { 0x3f7d2b0ea197bf84UL };
static __constant int_double __dacospi_la_c4 = { 0x3f83ce53573ad3bcUL };
static __constant int_double __dacospi_la_c3 = { 0x3f8d1a452b1c8f59UL };
static __constant int_double __dacospi_la_c2 = { 0x3f98723a1d5e7f21UL };
static __constant int_double __dacospi_la_c1 = { 0x3fab2995e7b7b28cUL };
static __constant int_double __dacospi_la_c0 = { 0x3fd45f306dc9c883UL };
static __constant int_double __dacospi_la_two = { 0x4000000000000000UL };
static __constant int_double __dacospi_la_pi2h = { 0x3ff921fb54442d18UL };
static __constant int_double __dacospi_la_pi2l = { 0x3c91a62633145c07UL };
static __constant int_float __dacospi_la_small_float = { 0x01800000u };
__attribute__((always_inline))
inline int __internal_dacospi_la_cout (double *pxin, double *pres)
{
int nRet = 0;
double xin = *pxin;
int_double y, res;
{
int_double x, y, xa, RS, Shh2, High, R0;
double R, E, poly, Sh, p910, p78, p56, p34, p12, R2;
unsigned long sgn_x;
float yf;
int_float fcorr;
x.f = xin;
xa.f = SPIRV_OCL_BUILTIN(fabs, _f64, ) (x.f);
sgn_x = x.w ^ xa.w;
y.f = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (-0.5, xa.f, 0.5);
R = xin * xin;
R = SPIRV_OCL_BUILTIN(fmin, _f64_f64, ) (R, y.f);
High.f = sgn_x ? 1.0 : 0;
High.f = (xa.f <= 0.5) ? 0.5 : High.f;
yf = (float) y.f;
yf += __dacospi_la_small_float.f;
yf = 1.0f / SPIRV_OCL_BUILTIN(sqrt, _f32, ) (yf);
RS.f = (double) (yf);
RS.w |= sgn_x;
Sh = y.f * RS.f;
Shh2.f = -2.0 * Sh;
E = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (-RS.f, Sh, 1.0);
R0.f = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (0.375, E, 0.5);
R0.f *= E;
R0.f = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (R0.f, Shh2.f, Shh2.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (__dacospi_la_c12.f, R, __dacospi_la_c11.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c10.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c9.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c8.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c7.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c6.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c5.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c4.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c3.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c2.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c1.f);
poly = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (poly, R, __dacospi_la_c0.f);
R0.f = (xa.f <= 0.5) ? x.f : R0.f;
res.f = SPIRV_OCL_BUILTIN(fma, _f64_f64_f64, ) (-poly, R0.f, High.f);
}
*pres = res.f;
nRet = (y.f >= 0) ? 0 : 1;
return nRet;
}
double __ocl_svml_acospi (double a)
{
double va1;
double vr1;
unsigned int vm;
double r;
va1 = a;;
__internal_dacospi_la_cout (&va1, &vr1);
r = vr1;;
return r;
}
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