patches/glibc/2.9/530-powerpc-8xx-CPU15-errata.patch
author Oron Peled <oron@actcom.co.il>
Mon Aug 03 23:11:53 2009 +0200 (2009-08-03)
branch1.4
changeset 1455 e6a3b4ffe576
parent 1016 a059741f7bd4
permissions -rw-r--r--
[configure] Fix automake version check

The configure script fails on automake-1.11 (in Fedora-11) since
it looks for 3-digit version number.

"Yann E. MORIN", added the following comment:

The check for the automake version is not against a 3-digit number,
but really against a 3-part version number, a-la 'x.y.z'. Versions
such as 1.10 and 1.11 are also valid.
     1 Fix memset on PowerPC 8xx, by Nye Liu:
     2 http://sourceware.org/ml/crossgcc/2008-10/msg00067.html
     3 
     4 Quote:
     5  I am working on a powerpc 860 toolchain, but I am having problems  
     6  convincing glibc to not emit code that uses the dcbz instruction (CPU15  
     7  dcbX bug). The source of the problem is sysdeps/powerpc/power3/memset.S
     8 
     9 --- glibc-2.7/sysdeps/powerpc/powerpc32/memset.S	2007-03-26 13:09:07.000000000 -0700
    10 +++ glibc-2.7/sysdeps/powerpc/powerpc32/memset.S.new	2008-10-23 20:28:52.000000000 -0700
    11 @@ -112,11 +112,13 @@
    12  	clrrwi.	rALIGN, rLEN, 5
    13  	mtcrf	0x01, rLEN	/* 40th instruction from .align */
    14  
    15 +#ifndef BROKEN_PPC_8xx_CPU15
    16  /* Check if we can use the special case for clearing memory using dcbz.
    17     This requires that we know the correct cache line size for this
    18     processor.  Getting the __cache_line_size may require establishing GOT
    19     addressability, so branch out of line to set this up.  */
    20  	beq	cr1, L(checklinesize)
    21 +#endif
    22  
    23  /* Store blocks of 32-bytes (256-bits) starting on a 32-byte boundary.
    24     Can't assume that rCHR is zero or that the cache line size is either
    25 @@ -158,6 +160,7 @@
    26  	add	rMEMP, rMEMP, rALIGN
    27  	b	L(medium_tail2)	/* 72nd instruction from .align */
    28  
    29 +#ifndef BROKEN_PPC_8xx_CPU15
    30  	.align	5
    31  	nop
    32  /* Clear cache lines of memory in 128-byte chunks.
    33 @@ -191,6 +194,7 @@
    34  	bdnz	L(zloop)
    35  	beqlr	cr5
    36  	b	L(medium_tail2)
    37 +#endif /* ! BROKEN_PPC_8xx_CPU15 */
    38  
    39  	.align	5
    40  L(small):
    41 @@ -248,6 +252,7 @@
    42  	stw	rCHR, -8(rMEMP)
    43  	blr
    44  
    45 +#ifndef BROKEN_PPC_8xx_CPU15
    46  L(checklinesize):
    47  #ifdef SHARED
    48  	mflr	rTMP
    49 @@ -329,6 +334,7 @@
    50  L(handletail32):
    51  	clrrwi.	rALIGN, rLEN, 5
    52  	b	L(nondcbz)
    53 +#endif /* ! BROKEN_PPC_8xx_CPU15 */
    54  
    55  END (BP_SYM (memset))
    56  libc_hidden_builtin_def (memset)