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// -*-C++-*-
#ifndef MATHFUNCS_FABS_H
#define MATHFUNCS_FABS_H
#include "mathfuncs_base.h"
#include <cassert>
#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(~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(~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 x - fmin(x, y);
}
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
{
return
lsr(as_int(x) & IV(FP::exponent_mask), FP::mantissa_bits) -
IV(FP::exponent_offset);
}
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 (as_int(x) & IV(FP::exponent_mask)) != IV(FP::exponent_mask);
#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 (as_int(x) & IV(~FP::signbit_mask)) == IV(FP::exponent_mask);
#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
(as_int(x) & IV(FP::exponent_mask)) == IV(FP::exponent_mask) &&
(as_int(x) & IV(FP::mantissa_mask)) != IV(I(0));
#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
(as_int(x) & IV(FP::exponent_mask)) != IV(FP::exponent_mask) &&
(as_int(x) & IV(FP::exponent_mask)) != IV(I(0));
#else
return BV(true);
#endif
}
template<typename realvec_t>
realvec_t mathfuncs<realvec_t>::vml_scalbn(realvec_t x, intvec_t n)
{
return as_float(as_int(x) + (n << I(FP::mantissa_bits)));
// return x * as_float((n + exponent_offset) << mantissa_bits);
}
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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