From 524ae9ea2e3ae9f5bf5d655595fda827e9dc50a1 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Thu, 26 Feb 2015 12:57:21 +0000 Subject: Fix ldbl-128ibm ilogbl near powers of 2 (bug 18029). The ldbl-128ibm implementation of ilogbl produces incorrect results when the high part of the argument is a power of 2 and the low part a nonzero number with the opposite sign (and so the returned exponent should be 1 less than that of the high part). For example, ilogbl (0x1.ffffffffffffffp1L) returns 2 but should return 1. (This is similar to (fixed) bug 16740 for frexpl, and bug 18030 for logbl.) This patch adds checks for that case. Tested for powerpc. [BZ #18029] * sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c (__ieee754_ilogbl): Adjust exponent of power of 2 down when low part has opposite sign. * math/libm-test.inc (ilogb_test_data): Add more tests. --- NEWS | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'NEWS') diff --git a/NEWS b/NEWS index db6c5f1..75e83e0 100644 --- a/NEWS +++ b/NEWS @@ -12,7 +12,7 @@ Version 2.22 4719, 14841, 13064, 14094, 15319, 15467, 15790, 15969, 16560, 16783, 17269, 17523, 17569, 17588, 17792, 17836, 17912, 17916, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978, 17987, 17991, 17996, 17998, - 17999, 18019, 18020. + 17999, 18019, 18020, 18029. * Character encoding and ctype tables were updated to Unicode 7.0.0, using new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red -- cgit v1.1