From e586257ca0da4aa635cb283dd461a169f2db3b8a Mon Sep 17 00:00:00 2001
From: Brad Bell <bradbell@seanet.com>
Date: Tue, 1 Feb 2022 06:16:04 -0700
Subject: [PATCH] Trying to understand machine epsilon in to_string.cpp test on
 ppc64le arch.

---
 cppad.spec | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/cppad.spec b/cppad.spec
index 6feb782..1f2db83 100644
--- a/cppad.spec
+++ b/cppad.spec
@@ -100,16 +100,14 @@ sed -i.bak CppAD-%{version}/test_more/debug_rel/CMakeLists.txt \
 cat << EOF > temp.cpp
 # include <iostream>
 # include <limits>
+template <class Float> void print_epsilon(const char* type_name)
+{   Float epsilon = std::numeric_limits<Float>::epsilon();
+    std::cout << type_name << " epsilson = " << epsilon << "\n";
+}
 int main(void)
-{   float float_eps = std::numeric_limits<float>::epsilon();
-    std::cout << "float_eps = " << float_eps << "\n";
-    //
-    float double_eps = std::numeric_limits<double>::epsilon();
-    std::cout << "double_eps = " << double_eps << "\n";
-    //
-    float long_double_eps = std::numeric_limits<long double>::epsilon();
-    std::cout << "long_double_eps = " << long_double_eps << "\n";
-    //
+{   print_epsilon<float>("float");
+    print_epsilon<double>("double");
+    print_epsilon<long double>("long double");
     return 0;
 }
 EOF
@@ -160,14 +158,16 @@ cat << EOF > to_string.patch
 71a93,94
 >         if( std::numeric_limits<Integer>::min() != 0 )
 >             std::cout << "unsigned_integer: min != 0\n";
-83a107,110
+83a107,111
 >         if( ! ok )
->         {   std::cout << "check/pi - 1.0 = " << check/pi - 1.0 << "\n";
+>         {   std::cout << "check / pi - 1.0 = " << check / pi - 1.0;
+>             std::cout << ", eps = " << eps << "\n";
 >             print_error("floating", "pi", pi, check, eps);
 >         }
-100a128,131
+100a129,133
 >         if( ! ok )
->         {   std::cout << "check/pi - 1.0 = " << check/pi - Base(1.0) << "\n";
+>         {   std::cout << "check / pi - 1.0 = " << check /pi - Base(1.0);
+>             std::cout << ", eps = " << eps << "\n";
 >             print_error("ad_floating", "pi", pi, check, eps);
 >         }
 EOF