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[PATCH] powerpc: Fix fesetexceptflag [BZ#17885]
- From: Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>
- To: "GNU C. Library" <libc-alpha at sourceware dot org>, "Carlos O'Donell" <carlos at redhat dot com>
- Date: Tue, 27 Jan 2015 10:44:15 -0200
- Subject: [PATCH] powerpc: Fix fesetexceptflag [BZ#17885]
- Authentication-results: sourceware.org; auth=none
While working on 'powerpc: Fix inline feraiseexcept, feclearexcept macros'
testcase I found an issue introduced by my patch 18f2945ae9216cfc, where it
optimizes the FPSCR set by just issuing a mtfs instruction if new flag is
different from older one. The issue is a typo, where the new flag should
the new value, instead of the old one.
I will work on additional testcases to stress it on 2.22. Tested powerpc64
and powerpc64le.
Carlos, I would like to push it on 2.21.
--
[BZ #17885]
* sysdeps/powerpc/fpu/fsetexcptflg.c (__fesetexceptflag): Fix correct
value to set as new flag.
--
diff --git a/NEWS b/NEWS
index 36b369f..57a614d 100644
--- a/NEWS
+++ b/NEWS
@@ -18,7 +18,7 @@ Version 2.21
17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719, 17722, 17723,
17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747, 17748, 17775,
17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797, 17803, 17806,
- 17834, 17844, 17848, 17868, 17869, 17870
+ 17834, 17844, 17848, 17868, 17869, 17870, 17885
* A new semaphore algorithm has been implemented in generic C code for all
machines. Previous custom assembly implementations of semaphore were
diff --git a/sysdeps/powerpc/fpu/fsetexcptflg.c b/sysdeps/powerpc/fpu/fsetexcptflg.c
index 5d99bf2..836d839 100644
--- a/sysdeps/powerpc/fpu/fsetexcptflg.c
+++ b/sysdeps/powerpc/fpu/fsetexcptflg.c
@@ -40,7 +40,7 @@ __fesetexceptflag (const fexcept_t *flagp, int excepts)
This may cause floating-point exceptions if the restored state
requests it. */
if (n.l != u.l)
- fesetenv_register (u.fenv);
+ fesetenv_register (n.fenv);
/* Deal with FE_INVALID_SOFTWARE not being implemented on some chips. */
if (flag & FE_INVALID)