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authorJoseph Myers <joseph@codesourcery.com>2015-06-24 15:12:03 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-06-24 15:12:03 +0000
commit8475ab16848cf2adb6ce3446749c2f1d10233286 (patch)
treece32b378b0e67c8d52f6a6a63347ae4b3711d159 /sysdeps/x86_64/fpu/e_ilogbl.S
parent36870482d2a33e3b703bd74b52063594389e827a (diff)
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Fix ldbl-128 expl missing underflows (bug 18586).
Similar to various other bugs in this area, the ldbl-128 expl
implementation does not raise the underflow exception for all
subnormal results, if the scaling down is exact although the actual
result is inexact.  This patch fixes this by forcing the exception in
this case (the tests that failed before and pass after the test are
already in the testsuite).

Tested for mips64.

	[BZ #18586]
	* sysdeps/ieee754/ldbl-128/e_expl.c (__ieee754_expl): Force
	underflow exception for small results.
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