dladiv-f(3)

dladiv.f –

Synopsis

Functions/Subroutines

subroutine dladiv (A, B, C, D, P, Q)
DLADIV performs complex division in real arithmetic, avoiding unnecessary overflow.

Function/Subroutine Documentation

subroutine dladiv (double precisionA, double precisionB, double precisionC, double precisionD, double precisionP, double precisionQ)

DLADIV performs complex division in real arithmetic, avoiding unnecessary overflow.

Purpose:

 DLADIV performs complex division in real arithmetic
 a + i*b
 p + i*q = ---------
 c + i*d
 The algorithm is due to Robert L. Smith and can be found
 in D. Knuth, The art of Computer Programming, Vol.2, p.195

 

Parameters:

A

 A is DOUBLE PRECISION

B

 B is DOUBLE PRECISION

C

 C is DOUBLE PRECISION

D

 D is DOUBLE PRECISION
 The scalars a, b, c, and d in the above expression.

P

 P is DOUBLE PRECISION

Q

 Q is DOUBLE PRECISION
 The scalars p and q in the above expression.

 

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 91 of file dladiv.f.

Author

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