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E.V.E
v2023.02.15
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E.V.E
v2023.02.15
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Basic useful constants (scalar and SIMD)
All EVE constants can be called in four ways:
upper, lower decorators can also been used (see the note below).Here ct denotes the constant name.
When the condition is present and evaluate to false the result element default to zero, but this behavior can be changed if the condition is expressed by an if_(...).else_(...) clause.
upper and lower can be used to provide values guaranted to be greater or equal (respectively less or equal) to the real mathematical value. For instance the regular nearest values of \(\pi\) for float and double are greater (resp. less) than the mathematical value. Variables | |
| constexpr auto | eve::allbits = functor<allbits_t> |
| Computes a constant with all bits set. | |
| constexpr auto | eve::bitincrement = functor<bitincrement_t> |
| Computes a constant with only the least significant bit set. | |
| constexpr auto | eve::eps = functor<eps_t> |
| Computes a constant to the machine epsilon. | |
| constexpr auto | eve::exponentmask = functor<exponentmask_t> |
| Computes the the exponent bit mask of IEEE float or double. | |
| constexpr auto | eve::false_ = functor<false_t> |
| Computes the false logical value. | |
| constexpr auto | eve::half = functor<half_t> |
| Computes the constant \(1/2\). | |
| constexpr auto | eve::inf = functor<inf_t> |
| Computes the infinity ieee value. | |
| constexpr auto | eve::iota = functor<iota_t> |
all numbers from 0 to size() - 1. equivalent to T{ [](int i, int) {return i; } } | |
| constexpr auto | eve::logeps = functor<logeps_t> |
| Computes the natural logarithm of the machine epsilon. | |
| constexpr auto | eve::majorant = functor<majorant_t> |
Computes a value x such that for any value y of the same type, is_not_greater(y, x) is true. | |
| constexpr auto | eve::mantissamask = functor<mantissamask_t> |
| Computes the mask to extract the mantissa bits of an ieee floating value. | |
| constexpr auto | eve::maxexponent = functor<maxexponent_t> |
| Computes the greatest exponent of a floating point IEEE value. | |
| constexpr auto | eve::maxexponentm1 = functor<maxexponentm1_t> |
| Computes the the greatest exponent of a floating point IEEE value minus one. | |
| constexpr auto | eve::maxexponentp1 = functor<maxexponentp1_t> |
| Computes the the greatest exponent of a floating point IEEE value plus one. | |
| constexpr auto | eve::maxflint = functor<maxflint_t> |
| Computes the smallest floating point representing an integer such that n == n+1. | |
| constexpr auto | eve::maxrepint = functor<maxrepint_t> |
Computes the maximum representable integer value. Same as maxflint for floating types and valmax for integral types. | |
| constexpr auto | eve::mhalf = functor<mhalf_t> |
| Computes the constant \(-1/2\). | |
| constexpr auto | eve::mindenormal = functor<mindenormal_t> |
| Computes the smallest denormal positive value. | |
| constexpr auto | eve::minexponent = functor<minexponent_t> |
| Computes the the greatest exponent of a floating point IEEE value. | |
| constexpr auto | eve::minf = functor<minf_t> |
| Computes the -infinity ieee value. | |
| constexpr auto | eve::minorant = functor<minorant_t> |
Computes a value x such that for any value y of the same type, is_not_less(y, x) is true. | |
| constexpr auto | eve::mone = functor<mone_t> |
| Computes the constant \(-1\). | |
| constexpr auto | eve::mzero = functor<mzero_t> |
| Computes the negative zero value. | |
| constexpr auto | eve::nan = functor<nan_t> |
| Computes the IEEE quiet NaN constant. | |
| constexpr auto | eve::nbmantissabits = functor<nbmantissabits_t> |
| Returns the number of mantissa bits of a floating point value. | |
| constexpr auto | eve::one = functor<one_t> |
| Computes the constant \(1\). | |
| constexpr auto | eve::oneosqrteps = functor<oneosqrteps_t> |
| Computes the the inverse of the square root of the machine epsilon. | |
| constexpr auto | eve::signmask = functor<signmask_t> |
| Computes a value in which the most significant bit is the only bit set. | |
| constexpr auto | eve::smallestposval = functor<smallestposval_t> |
| Computes the smallest normal positive value. | |
| constexpr auto | eve::sqrteps = functor<sqrteps_t> |
| Computes the square root of the machine epsilon. | |
| constexpr auto | eve::sqrtsmallestposval = functor<sqrtsmallestposval_t> |
| Computes the square root of the eve::smallestposval. | |
| constexpr auto | eve::sqrtvalmax = functor<sqrtvalmax_t> |
| Computes the the greatest value less than the square root of eve::valmax. | |
| constexpr auto | eve::true_ = functor<true_t> |
| Computes the logical true_ value. | |
| constexpr auto | eve::twotonmb = functor<twotonmb_t> |
| Computes the 2 power of the number of mantissa bits of a floating value. | |
| constexpr auto | eve::valmax = functor<valmax_t> |
| Computes the the greatest representable value. | |
| constexpr auto | eve::valmin = functor<valmin_t> |
| Computes the the lowest representable value. | |
| constexpr auto | eve::zero = functor<zero_t> |
| Computes the constant 0. | |