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[jabaws.git] / website / archive / binaries / mac / src / disembl / Tisean_3.0.1 / source_f / slatec / pythag.f

diff --git a/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/slatec/pythag.f b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/slatec/pythag.f
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-*DECK PYTHAG
-      REAL FUNCTION PYTHAG (A, B)
-C***BEGIN PROLOGUE  PYTHAG
-C***SUBSIDIARY
-C***PURPOSE  Compute the complex square root of a complex number without
-C            destructive overflow or underflow.
-C***LIBRARY   SLATEC
-C***TYPE      SINGLE PRECISION (PYTHAG-S)
-C***AUTHOR  (UNKNOWN)
-C***DESCRIPTION
-C
-C     Finds sqrt(A**2+B**2) without overflow or destructive underflow
-C
-C***SEE ALSO  EISDOC
-C***ROUTINES CALLED  (NONE)
-C***REVISION HISTORY  (YYMMDD)
-C   811101  DATE WRITTEN
-C   890531  Changed all specific intrinsics to generic.  (WRB)
-C   891214  Prologue converted to Version 4.0 format.  (BAB)
-C   900402  Added TYPE section.  (WRB)
-C***END PROLOGUE  PYTHAG
-      REAL A,B
-C
-      REAL P,Q,R,S,T
-C***FIRST EXECUTABLE STATEMENT  PYTHAG
-      P = MAX(ABS(A),ABS(B))
-      Q = MIN(ABS(A),ABS(B))
-      IF (Q .EQ. 0.0E0) GO TO 20
-   10 CONTINUE
-         R = (Q/P)**2
-         T = 4.0E0 + R
-         IF (T .EQ. 4.0E0) GO TO 20
-         S = R/T
-         P = P + 2.0E0*P*S
-         Q = Q*S
-      GO TO 10
-   20 PYTHAG = P
-      RETURN
-      END