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authorJoseph Myers <joseph@codesourcery.com>2016-02-18 21:40:39 +0000
committerJoseph Myers <joseph@codesourcery.com>2016-02-18 21:40:39 +0000
commit8a9fa0086dfe1b2b9d828712ef41fc7dd4b8f94c (patch)
tree5ef5ccd0b1231caa0a158613a0191a809c51679f /CONFORMANCE
parent1833769e19236119d6e41041a53e0f8047156c24 (diff)
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Fix ldbl-128ibm ceill for non-default rounding modes (bug 19592).
The ldbl-128ibm implementation of ceill is only correct in round-to-nearest mode (in other modes, there are incorrect results and overflow exceptions in some cases). It is also unnecessarily complicated, rounding both high and low parts to the nearest integer and then adjusting for the semantics of ceil, when it seems more natural to take the ceiling of the high part (__ceil optimized inline versions can be used), and that of the low part if the high part is an integer, as was done for floorl. This patch makes it use that simpler approach. Tested for powerpc. [BZ #19592] * sysdeps/ieee754/ldbl-128ibm/s_ceill.c (__ceill): Use __ceil on high and low parts then use ldbl_canonicalize_int if needed.
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