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// -*-C++-*-
#ifndef MATHFUNCS_FABS_H
#define MATHFUNCS_FABS_H
#include "mathfuncs_base.h"
#include <cmath>
namespace vecmathlib {
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_copysign(realvec_t x, realvec_t y)
{
intvec_t value = as_int(x) & IV(U(~FP::signbit_mask));
intvec_t sign = as_int(y) & IV(FP::signbit_mask);
return as_float(sign | value);
}
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_fabs(realvec_t x)
{
return as_float(as_int(x) & IV(U(~FP::signbit_mask)));
}
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_fdim(realvec_t x, realvec_t y)
{
// return ifthen(x > y, x - y, RV(0.0));
return fmax(x - y, RV(0.0));
}
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_fma(realvec_t x, realvec_t y, realvec_t z)
{
return x * y + z;
}
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_fmax(realvec_t x, realvec_t y)
{
return ifthen(x < y, y, x);
}
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_fmin(realvec_t x, realvec_t y)
{
return ifthen(y < x, y, x);
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_ilogb(realvec_t x) -> intvec_t
{
intvec_t e = lsr(as_int(x) & IV(FP::exponent_mask), FP::mantissa_bits);
intvec_t r = e - IV(FP::exponent_offset);
r = ifthen(convert_bool(e), r, IV(std::numeric_limits<int_t>::min()));
#if defined VML_HAVE_INF
r = ifthen(isinf(x), IV(std::numeric_limits<int_t>::max()), r);
#endif
#if defined VML_HAVE_NAN
r = ifthen(isnan(x), IV(std::numeric_limits<int_t>::min()), r);
#endif
return r;
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_ieee_isfinite(realvec_t x) -> boolvec_t
{
return (as_int(x) & IV(FP::exponent_mask)) != IV(FP::exponent_mask);
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_ieee_isinf(realvec_t x) -> boolvec_t
{
return (as_int(x) & IV(~FP::signbit_mask)) == IV(FP::exponent_mask);
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_ieee_isnan(realvec_t x) -> boolvec_t
{
return
(as_int(x) & IV(FP::exponent_mask)) == IV(FP::exponent_mask) &&
(as_int(x) & IV(FP::mantissa_mask)) != IV(I(0));
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_ieee_isnormal(realvec_t x) -> boolvec_t
{
return
(as_int(x) & IV(FP::exponent_mask)) != IV(FP::exponent_mask) &&
(as_int(x) & IV(FP::exponent_mask)) != IV(I(0));
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_isfinite(realvec_t x) -> boolvec_t
{
#if defined VML_HAVE_INF || defined VML_HAVE_NAN
return vml_ieee_isfinite(x);
#else
return BV(true);
#endif
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_isinf(realvec_t x) -> boolvec_t
{
#if defined VML_HAVE_INF
return vml_ieee_isinf(x);
#else
return BV(false);
#endif
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_isnan(realvec_t x) -> boolvec_t
{
#if defined VML_HAVE_NAN
return vml_ieee_isnan(x);
#else
return BV(false);
#endif
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_isnormal(realvec_t x) -> boolvec_t
{
#if defined VML_HAVE_DENORMALS || defined VML_HAVE_INF || defined VML_HAVE_NAN
return vml_ieee_isnormal(x);
#else
return BV(true);
#endif
}
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_ldexp(realvec_t x, intvec_t n)
{
realvec_t r = as_float(as_int(x) + (n << I(FP::mantissa_bits)));
r = ifthen((as_int(x) & IV(FP::exponent_mask)) == IV(I(0)), x, r);
return r;
}
template<typename realvec_t>
auto mathfuncs<realvec_t>::vml_signbit(realvec_t x) -> boolvec_t
{
return convert_bool(as_int(x) & IV(FP::signbit_mask));
}
}; // namespace vecmathlib
#endif // #ifndef MATHFUNCS_FABS_H
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