---
name: "cblat3.f"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/cblat3.f"
---

# cblat3.f(3)

## NAME

BLAS/TESTING/cblat3.f

## SYNOPSIS

### Functions/Subroutines

program **cblat3**\
 **CBLAT3**  subroutine **cchk1** (sname, eps, thresh, nout, ntra, trace, rewi, fatal, nidim, idim, nalf, alf, nbet, bet, nmax, a, aa, as, b, bb, bs, c, cc, cs, ct, g)\
 subroutine **cchk2** (sname, eps, thresh, nout, ntra, trace, rewi, fatal, nidim, idim, nalf, alf, nbet, bet, nmax, a, aa, as, b, bb, bs, c, cc, cs, ct, g)\
 subroutine **cchk3** (sname, eps, thresh, nout, ntra, trace, rewi, fatal, nidim, idim, nalf, alf, nmax, a, aa, as, b, bb, bs, ct, g, c)\
 subroutine **cchk4** (sname, eps, thresh, nout, ntra, trace, rewi, fatal, nidim, idim, nalf, alf, nbet, bet, nmax, a, aa, as, b, bb, bs, c, cc, cs, ct, g)\
 subroutine **cchk5** (sname, eps, thresh, nout, ntra, trace, rewi, fatal, nidim, idim, nalf, alf, nbet, bet, nmax, ab, aa, as, bb, bs, c, cc, cs, ct, g, w)\
 subroutine **cchke** (isnum, srnamt, nout)\
 subroutine **cmake** (type, uplo, diag, m, n, a, nmax, aa, lda, reset, transl)\
 subroutine **cmmch** (transa, transb, m, n, kk, alpha, a, lda, b, ldb, beta, c, ldc, ct, g, cc, ldcc, eps, err, fatal, nout, mv)\
 logical function **lce** (ri, rj, lr)\
 logical function **lceres** (type, uplo, m, n, aa, as, lda)\
 complex function **cbeg** (reset)\
 real function **sdiff** (x, y)\
 subroutine **chkxer** (srnamt, infot, nout, lerr, ok)\
 subroutine **xerbla** (srname, info)\
 subroutine **cchk6** (sname, eps, thresh, nout, ntra, trace, rewi, fatal, nidim, idim, nalf, alf, nbet, bet, nmax, a, aa, as, b, bb, bs, c, cc, cs, ct, g)\
 subroutine **cmmtch** (uplo, transa, transb, n, kk, alpha, a, lda, b, ldb, beta, c, ldc, ct, g, cc, ldcc, eps, err, fatal, nout, mv)\

## Function/Subroutine Documentation

### complex function cbeg (logical reset)

Definition at line **3534** of file **cblat3.f**.

### program cblat3

**CBLAT3**

**Purpose:**

```
!>
!> Test program for the COMPLEX          Level 3 Blas.
!>
!> The program must be driven by a short data file. The first 14 records
!> of the file are read using list-directed input, the last 10 records
!> are read using the format ( A6, L2 ). An annotated example of a data
!> file can be obtained by deleting the first 3 characters from the
!> following 23 lines:
!> 'cblat3.out'      NAME OF SUMMARY OUTPUT FILE
!> 6                 UNIT NUMBER OF SUMMARY FILE
!> 'CBLAT3.SNAP'     NAME OF SNAPSHOT OUTPUT FILE
!> -1                UNIT NUMBER OF SNAPSHOT FILE (NOT USED IF .LT. 0)
!> F        LOGICAL FLAG, T TO REWIND SNAPSHOT FILE AFTER EACH RECORD.
!> F        LOGICAL FLAG, T TO STOP ON FAILURES.
!> T        LOGICAL FLAG, T TO TEST ERROR EXITS.
!> 16.0     THRESHOLD VALUE OF TEST RATIO
!> 6                 NUMBER OF VALUES OF N
!> 0 1 2 3 5 9       VALUES OF N
!> 3                 NUMBER OF VALUES OF ALPHA
!> (0.0,0.0) (1.0,0.0) (0.7,-0.9)       VALUES OF ALPHA
!> 3                 NUMBER OF VALUES OF BETA
!> (0.0,0.0) (1.0,0.0) (1.3,-1.1)       VALUES OF BETA
!> CGEMM  T PUT F FOR NO TEST. SAME COLUMNS.
!> CHEMM  T PUT F FOR NO TEST. SAME COLUMNS.
!> CSYMM  T PUT F FOR NO TEST. SAME COLUMNS.
!> CTRMM  T PUT F FOR NO TEST. SAME COLUMNS.
!> CTRSM  T PUT F FOR NO TEST. SAME COLUMNS.
!> CHERK  T PUT F FOR NO TEST. SAME COLUMNS.
!> CSYRK  T PUT F FOR NO TEST. SAME COLUMNS.
!> CHER2K T PUT F FOR NO TEST. SAME COLUMNS.
!> CSYR2K T PUT F FOR NO TEST. SAME COLUMNS.
!> CGEMMTR T PUT F FOR NO TEST. SAME COLUMNS.
!>
!> Further Details
!> ===============
!>
!> See:
!>
!>    Dongarra J. J., Du Croz J. J., Duff I. S. and Hammarling S.
!>    A Set of Level 3 Basic Linear Algebra Subprograms.
!>
!>    Technical Memorandum No.88 (Revision 1), Mathematics and
!>    Computer Science Division, Argonne National Laboratory, 9700
!>    South Cass Avenue, Argonne, Illinois 60439, US.
!>
!> -- Written on 8-February-1989.
!>    Jack Dongarra, Argonne National Laboratory.
!>    Iain Duff, AERE Harwell.
!>    Jeremy Du Croz, Numerical Algorithms Group Ltd.
!>    Sven Hammarling, Numerical Algorithms Group Ltd.
!>
!>    10-9-00:  Change STATUS='NEW' to 'UNKNOWN' so that the testers
!>              can be run multiple times without deleting generated
!>              output files (susan)
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **85** of file **cblat3.f**.

### subroutine cchk1 (character\*7 sname, real eps, real thresh, integer nout, integer ntra, logical trace, logical rewi, logical fatal, integer nidim, integer, dimension( nidim ) idim, integer nalf, complex, dimension( nalf ) alf, integer nbet, complex, dimension( nbet ) bet, integer nmax, complex, dimension( nmax, nmax ) a, complex, dimension( nmax\*nmax ) aa, complex, dimension( nmax\*nmax ) as, complex, dimension( nmax, nmax ) b, complex, dimension( nmax\*nmax ) bb, complex, dimension( nmax\*nmax ) bs, complex, dimension( nmax, nmax ) c, complex, dimension( nmax\*nmax ) cc, complex, dimension( nmax\*nmax ) cs, complex, dimension( nmax ) ct, real, dimension( nmax ) g)

Definition at line **409** of file **cblat3.f**.

### subroutine cchk2 (character\*7 sname, real eps, real thresh, integer nout, integer ntra, logical trace, logical rewi, logical fatal, integer nidim, integer, dimension( nidim ) idim, integer nalf, complex, dimension( nalf ) alf, integer nbet, complex, dimension( nbet ) bet, integer nmax, complex, dimension( nmax, nmax ) a, complex, dimension( nmax\*nmax ) aa, complex, dimension( nmax\*nmax ) as, complex, dimension( nmax, nmax ) b, complex, dimension( nmax\*nmax ) bb, complex, dimension( nmax\*nmax ) bs, complex, dimension( nmax, nmax ) c, complex, dimension( nmax\*nmax ) cc, complex, dimension( nmax\*nmax ) cs, complex, dimension( nmax ) ct, real, dimension( nmax ) g)

Definition at line **694** of file **cblat3.f**.

### subroutine cchk3 (character\*7 sname, real eps, real thresh, integer nout, integer ntra, logical trace, logical rewi, logical fatal, integer nidim, integer, dimension( nidim ) idim, integer nalf, complex, dimension( nalf ) alf, integer nmax, complex, dimension( nmax, nmax ) a, complex, dimension( nmax\*nmax ) aa, complex, dimension( nmax\*nmax ) as, complex, dimension( nmax, nmax ) b, complex, dimension( nmax\*nmax ) bb, complex, dimension( nmax\*nmax ) bs, complex, dimension( nmax ) ct, real, dimension( nmax ) g, complex, dimension( nmax, nmax ) c)

Definition at line **973** of file **cblat3.f**.

### subroutine cchk4 (character\*7 sname, real eps, real thresh, integer nout, integer ntra, logical trace, logical rewi, logical fatal, integer nidim, integer, dimension( nidim ) idim, integer nalf, complex, dimension( nalf ) alf, integer nbet, complex, dimension( nbet ) bet, integer nmax, complex, dimension( nmax, nmax ) a, complex, dimension( nmax\*nmax ) aa, complex, dimension( nmax\*nmax ) as, complex, dimension( nmax, nmax ) b, complex, dimension( nmax\*nmax ) bb, complex, dimension( nmax\*nmax ) bs, complex, dimension( nmax, nmax ) c, complex, dimension( nmax\*nmax ) cc, complex, dimension( nmax\*nmax ) cs, complex, dimension( nmax ) ct, real, dimension( nmax ) g)

Definition at line **1283** of file **cblat3.f**.

### subroutine cchk5 (character\*7 sname, real eps, real thresh, integer nout, integer ntra, logical trace, logical rewi, logical fatal, integer nidim, integer, dimension( nidim ) idim, integer nalf, complex, dimension( nalf ) alf, integer nbet, complex, dimension( nbet ) bet, integer nmax, complex, dimension( 2\*nmax\*nmax ) ab, complex, dimension( nmax\*nmax ) aa, complex, dimension( nmax\*nmax ) as, complex, dimension( nmax\*nmax ) bb, complex, dimension( nmax\*nmax ) bs, complex, dimension( nmax, nmax ) c, complex, dimension( nmax\*nmax ) cc, complex, dimension( nmax\*nmax ) cs, complex, dimension( nmax ) ct, real, dimension( nmax ) g, complex, dimension( 2\*nmax ) w)

Definition at line **1615** of file **cblat3.f**.

### subroutine cchk6 (character\*7 sname, real eps, real thresh, integer nout, integer ntra, logical trace, logical rewi, logical fatal, integer nidim, integer, dimension( nidim ) idim, integer nalf, complex, dimension( nalf ) alf, integer nbet, complex, dimension( nbet ) bet, integer nmax, complex, dimension( nmax, nmax ) a, complex, dimension( nmax\*nmax ) aa, complex, dimension( nmax\*nmax ) as, complex, dimension( nmax, nmax ) b, complex, dimension( nmax\*nmax ) bb, complex, dimension( nmax\*nmax ) bs, complex, dimension( nmax, nmax ) c, complex, dimension( nmax\*nmax ) cc, complex, dimension( nmax\*nmax ) cs, complex, dimension( nmax ) ct, real, dimension( nmax ) g)

Definition at line **3693** of file **cblat3.f**.

### subroutine cchke (integer isnum, character\*7 srnamt, integer nout)

Definition at line **1988** of file **cblat3.f**.

### subroutine chkxer (character\*7 srnamt, integer infot, integer nout, logical lerr, logical ok)

Definition at line **3607** of file **cblat3.f**.

### subroutine cmake (character\*2 type, character\*1 uplo, character\*1 diag, integer m, integer n, complex, dimension( nmax, \* ) a, integer nmax, complex, dimension( \* ) aa, integer lda, logical reset, complex transl)

Definition at line **3125** of file **cblat3.f**.

### subroutine cmmch (character\*1 transa, character\*1 transb, integer m, integer n, integer kk, complex alpha, complex, dimension( lda, \* ) a, integer lda, complex, dimension( ldb, \* ) b, integer ldb, complex beta, complex, dimension( ldc, \* ) c, integer ldc, complex, dimension( \* ) ct, real, dimension( \* ) g, complex, dimension( ldcc, \* ) cc, integer ldcc, real eps, real err, logical fatal, integer nout, logical mv)

Definition at line **3253** of file **cblat3.f**.

### subroutine cmmtch (character\*1 uplo, character\*1 transa, character\*1 transb, integer n, integer kk, complex alpha, complex, dimension( lda, \* ) a, integer lda, complex, dimension( ldb, \* ) b, integer ldb, complex beta, complex, dimension( ldc, \* ) c, integer ldc, complex, dimension( \* ) ct, real, dimension( \* ) g, complex, dimension( ldcc, \* ) cc, integer ldcc, real eps, real err, logical fatal, integer nout, logical mv)

Definition at line **3983** of file **cblat3.f**.

### logical function lce (complex, dimension( \* ) ri, complex, dimension( \* ) rj, integer lr)

Definition at line **3441** of file **cblat3.f**.

### logical function lceres (character\*2 type, character\*1 uplo, integer m, integer n, complex, dimension( lda, \* ) aa, complex, dimension( lda, \* ) as, integer lda)

Definition at line **3473** of file **cblat3.f**.

### real function sdiff (real x, real y)

Definition at line **3588** of file **cblat3.f**.

### subroutine xerbla (character\*(\*) srname, integer info)

Definition at line **3637** of file **cblat3.f**.

## Author

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