Bulletin number:  334
Products affected: D700D
Description: nested func calls to math libraries
Component: compiler
Date: Wed Jul 11 16:41:56 BST 1990
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The following code when compiled for a T4 gives identical answers for
the two methods of evaluating the angle v. However, when compiled for a
T8 the first method yields the same result as for a T4, but the second
method gives a different incorrect result.

The workaround is not to nest function calls to the dblmath library.
This problem is fixed in D700E.

#USE dblmath
#USE snglmath
#USE userio
REAL64 s,t,u,v,temp0,temp1:
INT key
SEQ
  s,t,u := 0.1(REAL64),0.2(REAL64),0.3(REAL64)
  -- Method one
  temp0 := s/DSIN(u)
  temp1 := t/DSIN(u)
  v := DATAN2(temp0, temp1)
  write.real64(screen,v,0,0)
  --Method two
  v := DATAN2(s/DSIN(u),t/DSIN(u))
  newline(screen)
  write.real64(screen,v,0,0)
  keyboard ? key

SAMPLE OUTPUT:	T4			T8

		1.1071487177940904	1.1071487177940904
		1.1071487177940904	0.46364760900080614