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GNU C Library master sources branch master updated. glibc-2.16-ports-merge-572-g16a0e2e
- From: jsm28 at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 31 Oct 2012 20:45:15 -0000
- Subject: GNU C Library master sources branch master updated. glibc-2.16-ports-merge-572-g16a0e2e
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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=16a0e2ec87f104961b88173fe8c96f9348850b0d
commit 16a0e2ec87f104961b88173fe8c96f9348850b0d
Author: Joseph Myers <joseph@codesourcery.com>
Date: Wed Oct 31 20:44:59 2012 +0000
Fix ldbl-128ibm atan2l for x near 1.
diff --git a/ChangeLog b/ChangeLog
index fd72f40..e14bac6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
2012-10-31 Joseph Myers <joseph@codesourcery.com>
+ [BZ #14610]
+ * sysdeps/ieee754/ldbl-128ibm/e_atan2l.c (__ieee754_atan2l): Check
+ for low part of x being zero before using __atanl (y).
+ * math/libm-test.inc (atan2_test): Add another test.
+
* manual/install.texi (Configuring and compiling): Document
general use of test-wrapper and test-wrapper-env.
* INSTALL: Regenerated.
diff --git a/NEWS b/NEWS
index fe569e1..8b691e5 100644
--- a/NEWS
+++ b/NEWS
@@ -16,8 +16,8 @@ Version 2.17
14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14376, 14417,
14459, 14476, 14477, 14505, 14510, 14516, 14518, 14519, 14530, 14532,
14538, 14543, 14544, 14545, 14557, 14562, 14568, 14576, 14579, 14583,
- 14587, 14595, 14602, 14621, 14638, 14645, 14648, 14652, 14660, 14661,
- 14683, 14694, 14716, 14743, 14767, 14783.
+ 14587, 14595, 14602, 14610, 14621, 14638, 14645, 14648, 14652, 14660,
+ 14661, 14683, 14694, 14716, 14743, 14767, 14783.
* Support for STT_GNU_IFUNC symbols added for s390 and s390x.
Optimized versions of memcpy, memset, and memcmp added for System z10 and
diff --git a/math/libm-test.inc b/math/libm-test.inc
index 91019a1..9c77392 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -1297,6 +1297,9 @@ atan2_test (void)
TEST_ff_f (atan2, 1.390625L, 0.9296875L, 0.981498387184244311516296577615519772L);
TEST_ff_f (atan2, -0.00756827042671106339L, -.001792735857538728036L, -1.80338464113663849327153994379639112L);
+#if defined TEST_LDOUBLE && LDBL_MANT_DIG >= 64
+ TEST_ff_f (atan2, 0x1.00000000000001p0L, 0x1.00000000000001p0L, M_PI_4l);
+#endif
END (atan2);
}
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_atan2l.c b/sysdeps/ieee754/ldbl-128ibm/e_atan2l.c
index fe5c8bd..3e05355 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_atan2l.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_atan2l.c
@@ -65,7 +65,8 @@ __ieee754_atan2l(long double y, long double x)
if(((ix)>0x7ff0000000000000LL)||
((iy)>0x7ff0000000000000LL)) /* x or y is NaN */
return x+y;
- if(((hx-0x3ff0000000000000LL))==0) return __atanl(y); /* x=1.0L */
+ if(((hx-0x3ff0000000000000LL))==0
+ && (lx&0x7fffffffffffffff)==0) return __atanl(y); /* x=1.0L */
m = ((hy>>63)&1)|((hx>>62)&2); /* 2*sign(x)+sign(y) */
/* when y = 0 */
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 5 +++++
NEWS | 4 ++--
math/libm-test.inc | 3 +++
sysdeps/ieee754/ldbl-128ibm/e_atan2l.c | 3 ++-
4 files changed, 12 insertions(+), 3 deletions(-)
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