crosstool-ng: patches/glibc/2.2.5/glibc-2.2.5-ppc405erratum77.patch@2be7232a73ac

     1 # see http://bugs.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4155

     2 # and http://www.kegel.com/xgcc3/ppc405erratum77.html

     3 # See also matching patch for linuxthreads

     5 diff -aur glibc-2.2.5.orig/sysdeps/powerpc/atomicity.h glibc-2.2.5/sysdeps/powerpc/atomicity.h

     6 --- glibc-2.2.5.orig/sysdeps/powerpc/atomicity.h	Thu Jul  5 21:56:01 2001

     7 +++ glibc-2.2.5/sysdeps/powerpc/atomicity.h	Tue Jul 23 05:39:38 2002

     8 @@ -28,6 +28,17 @@

     9  # define __ATOMICITY_INLINE inline

    10  #endif

    12 +#ifdef __PPC405__

    13 +/* workaround for PPC405 erratum #77 - Mark Hatle, dank.  References:

    14 +   http://www-3.ibm.com/chips/techlib/techlib.nsf/techdocs/89DED00DEBFF54BF87256A8000491BA2/$file/405CR_C_errata_1_2.pdf

    15 +   http://ppc.bkbits.net:8080/linuxppc_2_4_devel/cset@1.489

    16 +   http://www.kegel.com/xgcc3/ppc405erratum77.html

    17 +   FIXME: using dbct instead of sync would be faster  */

    18 +#define __LIBC_PPC405_ERR77_SYNC   "sync \n\t"

    19 +#else

    20 +#define __LIBC_PPC405_ERR77_SYNC

    21 +#endif

    22 +

    23  static __ATOMICITY_INLINE int

    24  __attribute__ ((unused))

    25  exchange_and_add (volatile uint32_t *mem, int val)

    26 @@ -36,6 +47,7 @@

    27    __asm__ ("\n\

    28  0:	lwarx	%0,0,%2	\n\

    29  	add%I3	%1,%0,%3	\n\

    30 +	" __LIBC_PPC405_ERR77_SYNC "\n\

    31  	stwcx.	%1,0,%2	\n\

    32  	bne-	0b	\n\

    33  " : "=&b"(result), "=&r"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");

    34 @@ -50,6 +62,7 @@

    35    __asm__ ("\n\

    36  0:	lwarx	%0,0,%1	\n\

    37  	add%I2	%0,%0,%2	\n\

    38 +	" __LIBC_PPC405_ERR77_SYNC "\n\

    39  	stwcx.	%0,0,%1	\n\

    40  	bne-	0b	\n\

    41  " : "=&b"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");

    42 @@ -65,6 +78,7 @@

    43  	sub%I2c.	%0,%0,%2	\n\

    44  	cntlzw	%0,%0	\n\

    45  	bne-	1f	\n\

    46 +	" __LIBC_PPC405_ERR77_SYNC "\n\

    47  	stwcx.	%3,0,%1	\n\

    48  	bne-	0b	\n\

    49  1:	\n\

    50 @@ -79,6 +93,7 @@

    51    long int result;

    52    __asm__ ("\n\

    53  0:	lwarx	%0,0,%1	\n\

    54 +	" __LIBC_PPC405_ERR77_SYNC "\n\

    55  	stwcx.	%2,0,%1	\n\

    56  	bne-	0b	\n\

    57  " : "=&r"(result) : "r"(p), "r"(newval) : "cr0", "memory");

    58 @@ -94,6 +109,7 @@

    59  0:	lwarx	%0,0,%1	\n\

    60  	cmpwi	%0,0	\n\

    61  	bne-	1f	\n\

    62 +	" __LIBC_PPC405_ERR77_SYNC "\n\

    63  	stwcx.	%2,0,%1	\n\

    64  	bne-	0b	\n\

    65  1:	\n\

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sat Jul 28 21:34:41 2007 +0000 (2007-07-28)
changeset 301	2be7232a73ac
permissions	-rw-r--r--