Robert P. J. DAY says:
According to Mike Frysinger, this patch was removed from Gentoo in the
2.3.x series and didn't seem to cause any adverse effects. So toss it
from the patch directories for glibc 2.5 and up.
2 wget 'http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/opcodes/ppc-opc.c.diff?r1=1.70&r2=1.71&cvsroot=src'
4 http://mail.gnu.org/archive/html/bug-binutils/2004-05/msg00071.html
6 http://sources.redhat.com/ml/binutils-cvs/2004-05/msg00111.html
8 This fixes problems like
9 {standard input}: Assembler messages:
10 {standard input}:1: Error: Unrecognized opcode: `dssall'
11 which show up in binutils-2.15 when building the Linux kernel,
12 or possibly failed compilations when building setjmp/longjmp in glibc.
14 An alternative fix would be to pass -many to the assembler.
15 A patch to do that for glibc is at
16 wget 'http://sources.redhat.com/cgi-bin/get-raw-msg?listname=libc-alpha&date=2004-05&msgid=40B36E8C.9030609%40us.ibm.com'
17 Yet another, better, fix would be for gcc to generate assembly
18 that told the assembler which processor type to use.
19 Presumably the Linux kernel sources would need a fix, too.
20 Probably better to just fix binutils to accept sources that it used to.
23 ===================================================================
24 RCS file: /cvs/src/src/opcodes/ppc-opc.c,v
25 retrieving revision 1.70
26 retrieving revision 1.71
28 --- src/opcodes/ppc-opc.c 2004/05/05 13:43:36 1.70
29 +++ src/opcodes/ppc-opc.c 2004/05/19 05:11:48 1.71
30 @@ -1004,8 +1004,13 @@
32 /* If only one bit of the FXM field is set, we can use the new form
33 of the instruction, which is faster. Unlike the Power4 branch hint
34 - encoding, this is not backward compatible. */
35 - else if ((dialect & PPC_OPCODE_POWER4) != 0 && (value & -value) == value)
36 + encoding, this is not backward compatible. Do not generate the
37 + new form unless -mpower4 has been given, or -many and the two
38 + operand form of mfcr was used. */
39 + else if ((value & -value) == value
40 + && ((dialect & PPC_OPCODE_POWER4) != 0
41 + || ((dialect & PPC_OPCODE_ANY) != 0
42 + && (insn & (0x3ff << 1)) == 19 << 1)))
45 /* Any other value on mfcr is an error. */