|
yann@1
|
1 |
# see http://bugs.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4155
|
|
yann@1
|
2 |
# and http://www.kegel.com/xgcc3/ppc405erratum77.html
|
|
yann@1
|
3 |
# See also matching patch for glibc
|
|
yann@1
|
4 |
|
|
yann@1
|
5 |
diff -aur glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h
|
|
yann@1
|
6 |
--- glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h Thu May 17 12:47:46 2001
|
|
yann@1
|
7 |
+++ glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h Tue Jul 23 05:38:24 2002
|
|
yann@1
|
8 |
@@ -41,6 +41,17 @@
|
|
yann@1
|
9 |
#define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
|
|
yann@1
|
10 |
#define IMPLEMENT_TAS_WITH_CAS
|
|
yann@1
|
11 |
|
|
yann@1
|
12 |
+#ifdef __PPC405__
|
|
yann@1
|
13 |
+/* workaround for PPC405 erratum #77 - Mark Hatle, dank. References:
|
|
yann@1
|
14 |
+ http://www-3.ibm.com/chips/techlib/techlib.nsf/techdocs/89DED00DEBFF54BF87256A8000491BA2/$file/405CR_C_errata_1_2.pdf
|
|
yann@1
|
15 |
+ http://ppc.bkbits.net:8080/linuxppc_2_4_devel/cset@1.489
|
|
yann@1
|
16 |
+ http://www.kegel.com/xgcc3/ppc405erratum77.html
|
|
yann@1
|
17 |
+ FIXME: using dbct instead of sync would be faster */
|
|
yann@1
|
18 |
+#define __LINUXTHREADS_PPC405_ERR77_SYNC "sync \n\t"
|
|
yann@1
|
19 |
+#else
|
|
yann@1
|
20 |
+#define __LINUXTHREADS_PPC405_ERR77_SYNC
|
|
yann@1
|
21 |
+#endif
|
|
yann@1
|
22 |
+
|
|
yann@1
|
23 |
PT_EI int
|
|
yann@1
|
24 |
__compare_and_swap (long int *p, long int oldval, long int newval)
|
|
yann@1
|
25 |
{
|
|
yann@1
|
26 |
@@ -50,6 +61,7 @@
|
|
yann@1
|
27 |
"0: lwarx %0,0,%1 ;"
|
|
yann@1
|
28 |
" xor. %0,%3,%0;"
|
|
yann@1
|
29 |
" bne 1f;"
|
|
yann@1
|
30 |
+ __LINUXTHREADS_PPC405_ERR77_SYNC
|
|
yann@1
|
31 |
" stwcx. %2,0,%1;"
|
|
yann@1
|
32 |
" bne- 0b;"
|
|
yann@1
|
33 |
"1: "
|
|
yann@1
|
34 |
|