Intel(R) - Computational and Systems Biology at MIT

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3 Intel® Math Kernel Library User’s GuideTo compile for the LP64 interface, just omit the -i8 or -DMKL_ILP64 option.Notice that linking of the application compiled with the -i8 or -DMKL_ILP64 option to theLP64 libraries may result in unpredictable consequences and erroneous output.Table 3-3 summarizes the compiler options:Table 3-3Compiler options for the ILP64 interfaceFortranC or C++Compiling for the ILP64 interface ifort -i8 ... icc -DMKL_ILP64 ...Compiling for the LP64 interface ifort ... icc ...Coding for ILP64Although the *.f90, *.fi, and *.h files in the Intel MKL include directory were changed tomeet requirements of the ILP64 interface, the LP64 interface was not changed. That is, allfunction parameters that were 32-bit integers still remain to have the 32-bit integer type,and all function parameters that were standard long integers still remain belonging to thestandard long type. So, you do not need to change a single line of the existing code if youare not using the ILP64 interface.To migrate to ILP64 or write new code for ILP64, you need to use appropriate types forparameters of the Intel MKL functions and subroutines. For the parameters that must be64-bit integers in ILP64, you are encouraged to use the universal integer types, namely,• INTEGER for Fortran• MKL_INT for C/C++• MKL_LONG for the parameters of the C/C++ FFT interface.This way you make your code universal for both ILP64 and LP64 interfaces.You may alternatively use other 64-bit types for the integer parameters that must be64-bit in ILP64. For example, with Intel® compilers, you may use types:• INTEGER(KIND=8) for Fortran• long long int for C or C++Note however that your code written this way will not work for the LP64 interface.Table 3-4 summarizes usage of the integer types.3-8
Intel® Math Kernel Library Structure 3Table 3-4Integer types32-bit integersUniversal integers:• 64-bit for ILP64• 32-bit otherwiseUniversal type for the FFTinterface parametersFortranINTEGER*4orINTEGER(KIND=4)INTEGERwithout specifying KINDINTEGERwithout specifying KINDC or C++intMKL_INTMKL_LONGBrowsing the Intel MKL include filesGiven a function with integer parameters, the Reference Manual does not explain whichparameters become 64-bit and which remain 32-bit for ILP64.To find out this information, you need to browse the include files, examples, or tests. Youare encouraged to start with browsing the include files, as they contain prototypes for allIntel MKL functions. Then you may see the examples and tests for better understanding ofthe function usage.All include files are located in the /include directory. Table 3-5 showsthe include files to browse:Table 3-5Intel® MKL include filesFunction domainInclude filesFortranC or C++BLAS Routinesmkl_blas.f90mkl_blas.hmkl_blas.fiCBLAS Interface to BLASmkl_cblas.hSparse BLAS Routines mkl_spblas.fi mkl_spblas.hLAPACK Routinesmkl_lapack.f90mkl_lapack.hmkl_lapack.fiScaLAPACK Routinesmkl_scalapack.hSparse Solver Routines• PARDISO mkl_pardiso.f77mkl_pardiso.f90mkl_pardiso.h3-9
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LINPACK and MP LINPACKBenchmarks 10
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LINPACK and MP LINPACK Benchmarks 1
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A Intel® Math Kernel Library User
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IndexAAbsoft compiler, linking with
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Intel MKL choice, particular cases,
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