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Blitz Support : |
From: Einar Otnes (eiot_at_[hidden])
Date: 2003-07-23 02:07:19
I am struggling using Blitz++-0.6 on the SGI 7.3.1.3m compiler using -O3
optimization option. The code compiles fine, but the output results are
just zero. When using the debugging option things are working fine. I have
attached a simple program that exhibits this behaviour. Here, we get a
problem with initializing the array which is zero after calling the init()
routine. Is this a problem with the SGI compiler? Or am I doing something
wrong?
I have yet to try this example on the Intel Linux compiler.
The program and the Makefile is listed below:
Thanks
Einar Otnes
#include <iostream>
#include <string>
#include <blitz/array.h>
namespace EPL
{
template<typename T>
class Field
{
public:
Field(int M, int N)
{
init(M,N);
}
protected:
blitz::Array<T,2> dataArr;
void init(int M, int N){
// Initialize the array. Does not work when compiling with -O3.
Sometimes this problem can be solved by
// using for loops for initialization working on the array
elementwise.
dataArr.resize(M,N);
dataArr = 0.34*blitz::tensor::i;
}
};
template<typename T>
class BnField : public Field<T>
{
public:
BnField(int M, int N):Field<T>(M,N)
{
std::cerr << "Hello World!" << std::endl;
}
void multiplySelf(){
T number(1,2);
dataArr = number*dataArr;
}
void printAll(){
std::cerr << "dataArr = " << dataArr << std::endl;
}
};
} // End namespace EPL
// Main program starts here
using namespace EPL;
int main(int argc, char *argv[])
{
int M = 4;
int N = 5;
BnField<std::complex<float> > B1(M,N);
B1.printAll();
B1.multiplySelf();
B1.printAll();
return EXIT_SUCCESS;
}
The Makefile with the two different CXXFLAGS is given below. The code works
with the debugging option, but not without it.
# Path where Blitz++ is installed
BZDIR = /private/eiot/Blitz++-0.6
ARCH = mips64
CXX = CC #-Bstatic
# Flags for optimized executables
CXXFLAGS = -64 \
-DBZ_DISABLE_XOPEN_SOURCE \
-LANG:std -LANG:restrict \
-I$(BZDIR)/include \
-O3 -OPT:Olimit=0 -TENV:X=0 \
-apo
# Flags for debugging
#CXXFLAGS = -64 -g3 -DBZ_DEBUG \
# -DBZ_DISABLE_XOPEN_SOURCE \
# -LANG:std -LANG:restrict \
# -I$(BZDIR)/include \
# -apo
LDFLAGS = -64 -lCio
LIBS = -L$(BZDIR)/lib -lblitz \
-lm -lCio \
-apo
# Name of executable file
EFILE = main
OBJS = main.o
main: $(OBJS)
@echo "linking..."
$(CXX) $(LDFLAGS) -o $(EFILE) $(OBJS) $(LIBS)
$(OBJS): $(HDRS)
$(CXX) $(CXXFLAGS) -c $*.cpp
clean:
rm -f $(OBJS) $(EFILE)
rm -rf ii_files/
rm -rf rii_files/
main.o: main.cpp
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