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authorJoseph Myers <joseph@codesourcery.com>2015-10-06 17:37:49 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-10-06 17:37:49 +0000
commit6c9678ebd42358f931100130a368fafe375a0ba2 (patch)
tree31a8266da420a9aacd6054bb0ec9c29b5223ea7d /ChangeLog
parentb3364d05892be0170e8f67689736bb9b7597bc94 (diff)
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Fix ldbl-128ibm expl overflow in non-default rounding modes (bug 19078).
The ldbl-128ibm expl wrapper checks the argument to determine when to
call __kernel_standard_l, thereby overriding overflowing results from
__ieee754_expl that could otherwise (given appropriately patched
libgcc) be correct for the rounding mode.  This patch changes it to
check the result of __ieee754_expl instead, as other versions of this
wrapper do.

Tested for powerpc.

	[BZ #19078]
	* sysdeps/ieee754/ldbl-128ibm/w_expl.c (o_thres): Remove variable.
	(u_thres): Likewise.
	(__expl): Determine whether to call __kernel_standard_l based on
	value of result, not argument.
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 2015-10-06  Joseph Myers  <joseph@codesourcery.com>
 
+	[BZ #19078]
+	* sysdeps/ieee754/ldbl-128ibm/w_expl.c (o_thres): Remove variable.
+	(u_thres): Likewise.
+	(__expl): Determine whether to call __kernel_standard_l based on
+	value of result, not argument.
+
 	* math/libm-test.inc (scalb_test_data): Add more expectations for
 	the "inexact" exception.