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authorJoseph Myers <joseph@codesourcery.com>2016-06-08 23:11:42 +0000
committerJoseph Myers <joseph@codesourcery.com>2016-06-08 23:11:42 +0000
commit8c010e2f7135902b6dc90f0577573dacbb54cde9 (patch)
treecbd59f1350f8c5a0c0900c1fec63f849a8d66077 /sysdeps/x86_64
parent09096b36152dca599ca781b7299d0d662ca74ce7 (diff)
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Fix i386/x86_64 log1pl (sNaN) (bug 20229).
The i386/x86_64 versions of log1pl return sNaN for sNaN input.  This
patch fixes them to add a NaN input to itself so that qNaN is returned
in this case.

Tested for x86_64 and x86.

	[BZ #20229]
	* sysdeps/i386/fpu/s_log1pl.S (__log1pl): Add NaN input to itself.
	* sysdeps/x86_64/fpu/s_log1pl.S (__log1pl): Likewise.
	* math/libm-test.inc (log1p_test_data): Add sNaN tests.
Diffstat (limited to 'sysdeps/x86_64')
-rw-r--r--sysdeps/x86_64/fpu/s_log1pl.S1
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/s_log1pl.S b/sysdeps/x86_64/fpu/s_log1pl.S
index e83f64d3c0..947e5e4552 100644
--- a/sysdeps/x86_64/fpu/s_log1pl.S
+++ b/sysdeps/x86_64/fpu/s_log1pl.S
@@ -68,6 +68,7 @@ ENTRY(__log1pl)
 	jnz	4b		// in case x is ħInf
 	fstp	%st(1)
 	fstp	%st(1)
+	fadd	%st(0)
 	ret
 
 END (__log1pl)