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authorJoseph Myers <joseph@codesourcery.com>2012-10-30 13:54:50 +0000
committerJoseph Myers <joseph@codesourcery.com>2012-10-30 13:54:50 +0000
commit8627a2329c5e6fc09bf9f0f070a21aca41f2b122 (patch)
treef1e7aa19f3fe1a9b3f9e403ced782c6f7d612f66 /ChangeLog
parent2a27fd6dae3edec949deda9a55928a0e22c8a8ae (diff)
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Fix fma missing underflows and bad results for some subnormal results (bugs 14152, 14783).
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 2012-10-30  Joseph Myers  <joseph@codesourcery.com>
 
+	[BZ #14152]
+	[BZ #14783]
+	* sysdeps/ieee754/dbl-64/s_fma.c (__fma): Extract low bits of
+	result and shift together with sticky bit instead of replicating
+	round-to-nearest rounding.
+	* sysdeps/ieee754/ldbl-128/s_fmal.c (__fmal): Likewise.
+	* sysdeps/ieee754/ldbl-96/s_fmal.c (__fmal): Likewise.
+	* math/libm-test.inc (fma_test): Add more tests.  Do not permit
+	missing underflow exceptions.
+	(fma_test_towardzero): Add more tests.
+	(fma_test_downward): Likewise.
+	(fma_test_upward): Likewise.
+
 	[BZ #14047]
 	* sysdeps/generic/tininess.h: New file.
 	* sysdeps/i386/tininess.h: Likewise.