mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2025-01-05 20:44:08 +00:00
35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
|
# see http://bugs.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4155
|
||
|
|
# and http://www.kegel.com/xgcc3/ppc405erratum77.html
|
||
|
|
# See also matching patch for glibc
|
||
|
|
|
||
|
|
diff -aur glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h
|
||
|
|
--- glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h Thu May 17 12:47:46 2001
|
||
|
|
+++ glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h Tue Jul 23 05:38:24 2002
|
||
|
|
@@ -41,6 +41,17 @@
|
||
|
|
#define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
|
||
|
|
#define IMPLEMENT_TAS_WITH_CAS
|
||
|
|
|
||
|
|
+#ifdef __PPC405__
|
||
|
|
+/* workaround for PPC405 erratum #77 - Mark Hatle, dank. References:
|
||
|
|
+ http://www-3.ibm.com/chips/techlib/techlib.nsf/techdocs/89DED00DEBFF54BF87256A8000491BA2/$file/405CR_C_errata_1_2.pdf
|
||
|
|
+ http://ppc.bkbits.net:8080/linuxppc_2_4_devel/cset@1.489
|
||
|
|
+ http://www.kegel.com/xgcc3/ppc405erratum77.html
|
||
|
|
+ FIXME: using dbct instead of sync would be faster */
|
||
|
|
+#define __LINUXTHREADS_PPC405_ERR77_SYNC "sync \n\t"
|
||
|
|
+#else
|
||
|
|
+#define __LINUXTHREADS_PPC405_ERR77_SYNC
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
PT_EI int
|
||
|
|
__compare_and_swap (long int *p, long int oldval, long int newval)
|
||
|
|
{
|
||
|
|
@@ -50,6 +61,7 @@
|
||
|
|
"0: lwarx %0,0,%1 ;"
|
||
|
|
" xor. %0,%3,%0;"
|
||
|
|
" bne 1f;"
|
||
|
|
+ __LINUXTHREADS_PPC405_ERR77_SYNC
|
||
|
|
" stwcx. %2,0,%1;"
|
||
|
|
" bne- 0b;"
|
||
|
|
"1: "
|
||
|
|
|