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Diffstat (limited to 'manual/math.texi')
| -rw-r--r-- | manual/math.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/manual/math.texi b/manual/math.texi index 72f3fda0a3..5c9f7b9f1c 100644 --- a/manual/math.texi +++ b/manual/math.texi @@ -1327,6 +1327,16 @@ necessarily the exact value actually passed with discontiguous mantissa bits. @item +For the IBM @code{long double} format, functions whose results are +fully specified by reference to corresponding IEEE 754 floating-point +operations have the same accuracy goals as other functions, but with +the error bound being the same as that for division (3ulp). +Furthermore, ``inexact'' and ``underflow'' exceptions may be raised +for all functions for any inputs, even where such exceptions are +inconsistent with the returned value, since the underlying +floating-point arithmetic has that property. + +@item Functions behave as if the infinite-precision result computed is zero, infinity or NaN if and only if that is the mathematically correct infinite-precision result. They behave as if the infinite-precision |