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Bug fix for math library.

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Bug fix for math library.

library/math.m:
	Changed the order of the parameters for the mercury implementation of
		math__log_2/2

	The old version is incorrect with respect to the library documentation.
	'math__log(B, X) = Log' is supposed to return Log as the logarithm to
	base B of X.  After doing domain checks, this predicate calls
	math__log_2(B, X), which is defined correctly for the C and C#
	implementations, but had the parameters the wrong way around for the
	(default) mercury implementation, so it in fact returned Log as the
	logarithm to base X of B (in other words the reciprocal of what was
	intended).
This commit is contained in:
James Goddard
2003-12-11 03:05:39 +00:00
parent a76b0eeb42
commit e62c7da10c
1 changed files with 1 additions and 1 deletions
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library/math.m
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@@ -641,7 +641,7 @@ math__log(B, X) = Log :-
Log = System.Math.Log(X, B); Log = System.Math.Log(X, B);
"). ").
% Java implementation will default to mercury here. % Java implementation will default to mercury here.
math__log_2(X, B) = math__ln_2(X) / math__ln_2(B). math__log_2(B, X) = math__ln_2(X) / math__ln_2(B).
% %
% math__sin(X) = Sin is true if Sin is the sine of X. % math__sin(X) = Sin is true if Sin is the sine of X.