HP MLIB User's Guide Vol. 1 7th Ed.

Chapter 3 Basic Matrix Operations 207
What you need to know to use these subprograms
What you need to know to use these subprograms
The following sections describe overall considerations for using matrix
subprograms:
• Subroutine naming convention
• Operator arguments in the BLAS Standard
Subroutine naming convention
The Extended BLAS uses a subroutine naming convention that encodes the
function of each subroutine into its name. Extended BLAS subprogram names
consist of four, five, or six characters in the form TXXY, TXXYY, or TXXYYY.
The BLAS Standard uses the same naming convention as the Extended BLAS,
with the addition of F_ at the beginning of each routine name. That is, BLAS
Standard subprogram names take the form F_TXXY, F_TXXYY, or F_TXXYYY.
For example, the legacy BLAS single-precision, triangular-solve routine is
named STRSM and its BLAS Standard counterpart is named F_STRSM. Refer
to “Legacy BLAS routines” on page 211 and “BLAS Standard routines” on
page 339.
The first letter, denoted by T, in the naming convention indicates one of the four
Fortran data types, as shown in Table 3-1.
Table 3-1 Extended BLAS Naming Convention—Data Type
T Data Type
S Single Precision REAL
D Double Precision REAL
C Single Precision COMPLEX
Z Double Precision COMPLEX