Data Types

NVPL BLAS types are defined in include/nvpl_blas_types.h header file.

Complex Data Types

C / C++

For portability, NVPL BLAS defines its own single precision and double precision complex data types: nvpl_scomplex_t and nvpl_dcomplex_t. These types are structures with two fields (real and imag) of the corresponding floating-point data type (float and double respectively).

For better interoperability with user’s code, it is allowed to redefine the types before including nvpl_blas_types.h, as long as they are ABI compatible with the above definition.

For instance:

• For C with standard C99 and newer one can do:

  #include <complex.h>
  #define nvpl_scomplex_t float complex
  #define nvpl_dcomplex_t dobule complex
  #include "nvpl_blas_types.h"
  

• For C++:

  #include <complex>
  #define nvpl_scomplex_t std::complex<float>
  #define nvpl_dcomplex_t std::complex<double>
  #include "nvpl_blas_types.h"
  

Integer Data Types

See also

LP64 and ILP64 Interfaces

C / C++

NVPL BLAS defines the following integer data types:

• nvpl_int32_t: 32-bit integer, an alias to int32_t

• nvpl_int64_t: 64-bit integer, an alias to int64_t

• nvpl_int_t:

  • an alias to nvpl_int64_t, if NVPL_ILP64 macro is defined

  • an alias to nvpl_int32_t, otherwise.

Most BLAS C and Fortran-style APIs use nvpl_int_t that allows using NVPL BLAS for both LP64 (where integers are 32-bit), and ILP64 (integers are 64-bit) modes based on presence or absence of NVPL_ILP64 macro.

Most Service APIs take integer parameters of fixed length, for instance nvpl_int32_t.

Please check the reference manual to see the exact API signature.

Fortran

Most BLAS APIs take integer parameters of type INTEGER, which has unspecified length, and which can be controlled with the compiler flags (like -fdefault-integer-8 for GNU Fortran).

Most Service APIs take integer parameters of fixed length, for instance INTEGER*4.

Please check the reference manual to see the exact API signature.