From 33ca9b4ee690ed12bd072273ea0d24c5eaae77fd Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 7 Mar 2014 23:11:38 +0100
Subject: Add support for OSX in BTL and fix a few warnings

---
 bench/btl/CMakeLists.txt                           |  8 +++-
 bench/btl/generic_bench/bench.hh                   |  4 +-
 bench/btl/generic_bench/btl.hh                     |  2 +-
 bench/btl/generic_bench/init/init_matrix.hh        | 10 ++---
 bench/btl/generic_bench/init/init_vector.hh        |  2 +-
 .../generic_bench/timers/portable_perf_analyzer.hh |  2 +-
 bench/btl/generic_bench/timers/portable_timer.hh   | 46 +++++++++++++++++++++-
 bench/btl/libs/eigen3/eigen3_interface.hh          |  8 ++--
 8 files changed, 65 insertions(+), 17 deletions(-)

diff --git a/bench/btl/CMakeLists.txt b/bench/btl/CMakeLists.txt
index 119b470d9..0ac5c15fc 100644
--- a/bench/btl/CMakeLists.txt
+++ b/bench/btl/CMakeLists.txt
@@ -48,6 +48,12 @@ include_directories(
 #   set(DEFAULT_LIBRARIES ${MKL_LIBRARIES})
 # endif (MKL_FOUND)
 
+find_library(EIGEN_BTL_RT_LIBRARY rt)
+# if we cannot find it easily, then we don't need it!
+if(NOT EIGEN_BTL_RT_LIBRARY)
+  set(EIGEN_BTL_RT_LIBRARY "")
+endif()
+
 MACRO(BTL_ADD_BENCH targetname)
 
   foreach(_current_var ${ARGN})
@@ -70,7 +76,7 @@ MACRO(BTL_ADD_BENCH targetname)
   IF(BUILD_${targetname})
     ADD_EXECUTABLE(${targetname} ${_sources})
     ADD_TEST(${targetname} "${targetname}")
-    target_link_libraries(${targetname} ${DEFAULT_LIBRARIES} rt)
+    target_link_libraries(${targetname} ${DEFAULT_LIBRARIES} ${EIGEN_BTL_RT_LIBRARY})
   ENDIF(BUILD_${targetname})
 
 ENDMACRO(BTL_ADD_BENCH)
diff --git a/bench/btl/generic_bench/bench.hh b/bench/btl/generic_bench/bench.hh
index 005c36395..7b7b951b5 100644
--- a/bench/btl/generic_bench/bench.hh
+++ b/bench/btl/generic_bench/bench.hh
@@ -102,8 +102,8 @@ BTL_DONT_INLINE void bench( int size_min, int size_max, int nb_point )
       // merge the two data
       std::vector<int> newSizes;
       std::vector<double> newFlops;
-      int i=0;
-      int j=0;
+      unsigned int i=0;
+      unsigned int j=0;
       while (i<tab_sizes.size() && j<oldSizes.size())
       {
         if (tab_sizes[i] == oldSizes[j])
diff --git a/bench/btl/generic_bench/btl.hh b/bench/btl/generic_bench/btl.hh
index f1a88ff74..4670f5113 100644
--- a/bench/btl/generic_bench/btl.hh
+++ b/bench/btl/generic_bench/btl.hh
@@ -46,7 +46,7 @@
 
 #if (defined __GNUC__) && (!defined __INTEL_COMPILER) && !defined(__arm__) && !defined(__powerpc__)
 #define BTL_DISABLE_SSE_EXCEPTIONS()  { \
-  int aux; \
+  int aux = 0; \
   asm( \
   "stmxcsr   %[aux]           \n\t" \
   "orl       $32832, %[aux]   \n\t" \
diff --git a/bench/btl/generic_bench/init/init_matrix.hh b/bench/btl/generic_bench/init/init_matrix.hh
index 67cbd2073..6382d30c8 100644
--- a/bench/btl/generic_bench/init/init_matrix.hh
+++ b/bench/btl/generic_bench/init/init_matrix.hh
@@ -29,7 +29,7 @@ BTL_DONT_INLINE void init_row(Vector & X, int size, int row){
 
   X.resize(size);
 
-  for (int j=0;j<X.size();j++){
+  for (unsigned int j=0;j<X.size();j++){
     X[j]=typename Vector::value_type(init_function(row,j));
   }
 }
@@ -42,7 +42,7 @@ BTL_DONT_INLINE void init_row(Vector & X, int size, int row){
 template<double init_function(int,int),class Vector>
 BTL_DONT_INLINE void init_matrix(Vector &  A, int size){
   A.resize(size);
-  for (int row=0; row<A.size() ; row++){
+  for (unsigned int row=0; row<A.size() ; row++){
     init_row<init_function>(A[row],size,row);
   }
 }
@@ -50,11 +50,11 @@ BTL_DONT_INLINE void init_matrix(Vector &  A, int size){
 template<double init_function(int,int),class Matrix>
 BTL_DONT_INLINE void init_matrix_symm(Matrix&  A, int size){
   A.resize(size);
-  for (int row=0; row<A.size() ; row++)
+  for (unsigned int row=0; row<A.size() ; row++)
     A[row].resize(size);
-  for (int row=0; row<A.size() ; row++){
+  for (unsigned int row=0; row<A.size() ; row++){
     A[row][row] = init_function(row,row);
-    for (int col=0; col<row ; col++){
+    for (unsigned int col=0; col<row ; col++){
       double x = init_function(row,col);
       A[row][col] = A[col][row] = x;
     }
diff --git a/bench/btl/generic_bench/init/init_vector.hh b/bench/btl/generic_bench/init/init_vector.hh
index efaf0c92e..518e87dbe 100644
--- a/bench/btl/generic_bench/init/init_vector.hh
+++ b/bench/btl/generic_bench/init/init_vector.hh
@@ -29,7 +29,7 @@ void init_vector(Vector & X, int size){
 
   X.resize(size);
 
-  for (int i=0;i<X.size();i++){
+  for (unsigned int i=0;i<X.size();i++){
     X[i]=typename Vector::value_type(init_function(i));
   }
 }
diff --git a/bench/btl/generic_bench/timers/portable_perf_analyzer.hh b/bench/btl/generic_bench/timers/portable_perf_analyzer.hh
index fc0f3168d..5e579fb49 100644
--- a/bench/btl/generic_bench/timers/portable_perf_analyzer.hh
+++ b/bench/btl/generic_bench/timers/portable_perf_analyzer.hh
@@ -78,7 +78,7 @@ public:
     // time measurement
     action.calculate();
     _chronos.start();
-    for (int ii=0;ii<_nb_calc;ii++)
+    for (unsigned int ii=0;ii<_nb_calc;ii++)
     {
       action.calculate();
     }
diff --git a/bench/btl/generic_bench/timers/portable_timer.hh b/bench/btl/generic_bench/timers/portable_timer.hh
index e6ad309fe..c199811b6 100755
--- a/bench/btl/generic_bench/timers/portable_timer.hh
+++ b/bench/btl/generic_bench/timers/portable_timer.hh
@@ -34,7 +34,7 @@
 //  timer  -------------------------------------------------------------------//
 
 //  A timer object measures CPU time.
-#ifdef _MSC_VER
+#if defined(_MSC_VER)
 
 #define NOMINMAX
 #include <windows.h>
@@ -87,6 +87,48 @@
 
  }; // Portable_Timer
 
+#elif defined(__APPLE__)
+#include <CoreServices/CoreServices.h>
+#include <mach/mach_time.h>
+
+
+class Portable_Timer
+{
+ public:
+
+  Portable_Timer()
+  {
+  }
+
+  void start()
+  {
+    m_start_time = double(mach_absolute_time())*1e-9;;
+
+  }
+
+  void stop()
+  {
+    m_stop_time = double(mach_absolute_time())*1e-9;;
+
+  }
+
+  double elapsed()
+  {
+    return  user_time();
+  }
+
+  double user_time()
+  {
+    return m_stop_time - m_start_time;
+  }
+
+
+private:
+
+  double m_stop_time, m_start_time;
+
+}; // Portable_Timer (Apple)
+
 #else
 
 #include <sys/time.h>
@@ -138,7 +180,7 @@ private:
   int m_clkid;
   double m_stop_time, m_start_time;
 
-}; // Portable_Timer
+}; // Portable_Timer (Linux)
 
 #endif
 
diff --git a/bench/btl/libs/eigen3/eigen3_interface.hh b/bench/btl/libs/eigen3/eigen3_interface.hh
index 31bcc1f93..0c8aa74da 100644
--- a/bench/btl/libs/eigen3/eigen3_interface.hh
+++ b/bench/btl/libs/eigen3/eigen3_interface.hh
@@ -52,8 +52,8 @@ public :
   static BTL_DONT_INLINE void matrix_from_stl(gene_matrix & A, stl_matrix & A_stl){
     A.resize(A_stl[0].size(), A_stl.size());
 
-    for (int j=0; j<A_stl.size() ; j++){
-      for (int i=0; i<A_stl[j].size() ; i++){
+    for (unsigned int j=0; j<A_stl.size() ; j++){
+      for (unsigned int i=0; i<A_stl[j].size() ; i++){
         A.coeffRef(i,j) = A_stl[j][i];
       }
     }
@@ -62,13 +62,13 @@ public :
   static BTL_DONT_INLINE  void vector_from_stl(gene_vector & B, stl_vector & B_stl){
     B.resize(B_stl.size(),1);
 
-    for (int i=0; i<B_stl.size() ; i++){
+    for (unsigned int i=0; i<B_stl.size() ; i++){
       B.coeffRef(i) = B_stl[i];
     }
   }
 
   static BTL_DONT_INLINE  void vector_to_stl(gene_vector & B, stl_vector & B_stl){
-    for (int i=0; i<B_stl.size() ; i++){
+    for (unsigned int i=0; i<B_stl.size() ; i++){
       B_stl[i] = B.coeff(i);
     }
   }
-- 
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