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Community source repository for glibc add-on ports branch, master, updated. glibc-2.15-116-g0e8a8f6
- From: carlos at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 22 Mar 2012 04:06:41 -0000
- Subject: Community source repository for glibc add-on ports branch, master, updated. glibc-2.15-116-g0e8a8f6
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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc-ports.git;a=commitdiff;h=0e8a8f6d58000e8bc450ec484fe16a51c0b982c7
commit 0e8a8f6d58000e8bc450ec484fe16a51c0b982c7
Author: Carlos O'Donell <carlos_odonell@mentor.com>
Date: Thu Mar 22 00:05:14 2012 -0400
[PARISC] small atomic.h optimization
We do not negate the light-weight syscall return and instead
just check for the negative errno value allowing the compiler
to optimize as required.
diff --git a/ChangeLog.hppa b/ChangeLog.hppa
index 5271475..700c78f 100644
--- a/ChangeLog.hppa
+++ b/ChangeLog.hppa
@@ -1,3 +1,10 @@
+2012-03-22 Carlos O'Donell <carlos@systemhalted.org>
+
+ [BZ #6730]
+
+ * sysdeps/unix/sysv/linux/hppa/bits/atomic.h: Don't negate %r21 and
+ check for -EFAULT and -ENOSYS instead.
+
2012-03-09 Richard Henderson <rth@twiddle.net>
* sysdeps/hppa/hppa1.1/s_signbit.c: Use <> to include math_private.h.
diff --git a/sysdeps/unix/sysv/linux/hppa/bits/atomic.h b/sysdeps/unix/sysv/linux/hppa/bits/atomic.h
index 89823d2..d94daf1 100644
--- a/sysdeps/unix/sysv/linux/hppa/bits/atomic.h
+++ b/sysdeps/unix/sysv/linux/hppa/bits/atomic.h
@@ -79,14 +79,13 @@ typedef uintmax_t uatomic_max_t;
"cmpb,=,n %%r25, %%r21, 0b \n\t" \
"nop \n\t" \
"stw %%r28, %0 \n\t" \
- "sub %%r0, %%r21, %%r21 \n\t" \
"stw %%r21, %1 \n\t" \
: "=m" (lws_ret), "=m" (lws_errno) \
: "r" (mem), "r" (oldval), "r" (newval) \
: _LWS_CLOBBER \
); \
\
- if(lws_errno == EFAULT || lws_errno == ENOSYS) \
+ if(lws_errno == -EFAULT || lws_errno == -ENOSYS) \
ABORT_INSTRUCTION; \
\
lws_ret; \
-----------------------------------------------------------------------
Summary of changes:
ChangeLog.hppa | 7 +++++++
sysdeps/unix/sysv/linux/hppa/bits/atomic.h | 3 +--
2 files changed, 8 insertions(+), 2 deletions(-)
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