exp (Core Functions)


Import

#include <archr/core/exp.h>
#include <archr/core/exp.hpp>
import archr.core
atomsLoads('archr')

Synopsis

 float archr_core_exp_1f32(const float i1);
(1)
 double archr_core_exp_1f64(const double i1);
(2)
 void archr_core_exp_f32(float *o0, const float *i1, size_t sz);
(3)
 void archr_core_exp_f64(double *o0, const double *i1, size_t sz);
(4)
 float exp(const float i1);
(1)
 double exp(const double i1);
(2)
 void exp(const float *i1, size_t sz, float *o0);
(3)
 void exp(const double *i1, size_t sz, double *o0);
(4)
template <typename Range> void exp(const Range& i1, Range& o0);
(5)
subroutine archr_core_exp_1f32(real(4) :: r, real(4), parameter :: i1)
(1)
subroutine archr_core_exp_1f64(real(8) :: r, real(8), parameter :: i1)
(2)
subroutine archr_core_exp_f32(real(4), dimension(*), parameter :: i1, integer(4) :: sz, real(4), dimension(*) :: o0)
(3)
subroutine archr_core_exp_f64(real(8), dimension(*), parameter :: i1, integer(4) :: sz, real(8), dimension(*) :: o0)
(4)
def exp(i1):
    return o0
(1)
function o0 = archr_core_exp(i1)
(1)

Description

Computes the exp:

Parameters

i1_first, i1_last

The range of input elements

o0

The beginning of the destination range, may be equal to i1

i1

The scalar/contiguous data input element

Example


#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <archr/core/exp.h>

double rand_in(double min, double max) {
  return min + ((double)(max - min) * ((double)rand() / RAND_MAX));
}

int main() {
  time_t t;
  size_t i;
  size_t sz = 10;
  float* i1 = (float*)malloc(sz * sizeof(float));
  float* o1 = (float*)malloc(sz * sizeof(float));

  srand((unsigned int)time(&t));
  for (i = 0; i < sz; ++i) {
    i1[i] = (float)rand_in((float)-10, (float)10);
  }
  archr_core_exp_f32(o1, i1, sz);
  for (i = 0; i < sz; ++i) {
    printf("%4lu: exp(%f) = %f\n", i, (double)i1[i], (double)o1[i]);
  }
}

Possible Output

   0: exp(-3.466457) = 0.031227
   1: exp(0.007624) = 1.007653
   2: exp(2.723485) = 15.233318
   3: exp(8.514454) = 4986.322266
   4: exp(-6.434300) = 0.001606
   5: exp(-3.718313) = 0.024275
   6: exp(-7.909604) = 0.000367
   7: exp(-4.880131) = 0.007596
   8: exp(-8.887694) = 0.000138
   9: exp(-2.049582) = 0.128789

#include <ctime>
#include <cstdio>
#include <cstdlib>
#include <cstdint>
#include <cstddef>
#include <vector>
#include <algorithm>
#include <iomanip>
#include <iostream>
#include <archr/core/exp.hpp>

double rand_in(double min, double max) {
  return min + (double(max - min) * (double(std::rand()) / RAND_MAX));
}

int main() {
  std::size_t i;
  std::size_t sz = 10;
  std::vector<float> i1(sz);
  std::vector<float> o1(sz);

  std::srand(std::time(0));
  std::generate(i1.begin(), i1.end(), []() { return rand_in(float(-10), float(10)); });
  archr::core::exp(i1.data(), sz, o1.data());
  for (i = 0; i < sz; ++i) {
    std::cout << std::setw(4) << i << ": " << "exp" << "(" << i1[i] << ")" << " = " << o1[i] << std::endl;
  }
}

Possible Output

   0: exp(9.42286) = 12367.9
   1: exp(1.83788) = 6.28322
   2: exp(-3.26225) = 0.038302
   3: exp(-7.82217) = 0.00040075
   4: exp(-5.00638) = 0.0066951
   5: exp(-8.05106) = 0.000318763
   6: exp(4.94578) = 140.581
   7: exp(9.34714) = 11466
   8: exp(5.10651) = 165.094
   9: exp(6.34508) = 569.682

program main
  integer(4), parameter  :: sz = 10
  real(4), dimension(sz) :: o0
  real(4), dimension(sz) :: i0
  real(8)                :: r0, r1
  real(8)                :: min0, max0
  real(8)                :: min1, max1
  real(8)                :: min2, max2
  ! Init:
    min0 = -10
    max0 = 10
  do i=1,sz
    r0 = random_in(min0, max0)
    i0(i) = r0
  end do
  ! Example:
  call archr_core_exp_f32(o0, i0, size(i0))
  ! Output:
  do i=1,sz
    print *, i, ": ", o0(i)
  end do
contains
  ! Generate a random number within a range
  function random_in(mn, mx) result(r)
    real(8) :: r
    real(8), intent(in) :: mn, mx
    r = mn + (rand() * (mx - mn))
  end function random_in
end program

Possible Output

           1 :    4.54068577E-05
           2 :    6.30342984E-04
           3 :    166.019348    
           4 :   0.437360376    
           5 :    1.92579937    
           6 :    3.62167694E-03
           7 :    1.16326497E-04
           8 :    35.7764397    
           9 :    36.0867271    
          10 :    5966.15039