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46 lines
1.9 KiB
Diff
46 lines
1.9 KiB
Diff
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Grabbed with
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wget 'http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/opcodes/ppc-opc.c.diff?r1=1.70&r2=1.71&cvsroot=src'
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See
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http://mail.gnu.org/archive/html/bug-binutils/2004-05/msg00071.html
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and
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http://sources.redhat.com/ml/binutils-cvs/2004-05/msg00111.html
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This fixes problems like
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{standard input}: Assembler messages:
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{standard input}:1: Error: Unrecognized opcode: `dssall'
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which show up in binutils-2.15 when building the Linux kernel,
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or possibly failed compilations when building setjmp/longjmp in glibc.
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An alternative fix would be to pass -many to the assembler.
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A patch to do that for glibc is at
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wget 'http://sources.redhat.com/cgi-bin/get-raw-msg?listname=libc-alpha&date=2004-05&msgid=40B36E8C.9030609%40us.ibm.com'
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Yet another, better, fix would be for gcc to generate assembly
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that told the assembler which processor type to use.
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Presumably the Linux kernel sources would need a fix, too.
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Probably better to just fix binutils to accept sources that it used to.
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===================================================================
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RCS file: /cvs/src/src/opcodes/ppc-opc.c,v
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retrieving revision 1.70
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retrieving revision 1.71
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diff -u -r1.70 -r1.71
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--- src/opcodes/ppc-opc.c 2004/05/05 13:43:36 1.70
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+++ src/opcodes/ppc-opc.c 2004/05/19 05:11:48 1.71
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@@ -1004,8 +1004,13 @@
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/* If only one bit of the FXM field is set, we can use the new form
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of the instruction, which is faster. Unlike the Power4 branch hint
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- encoding, this is not backward compatible. */
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- else if ((dialect & PPC_OPCODE_POWER4) != 0 && (value & -value) == value)
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+ encoding, this is not backward compatible. Do not generate the
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+ new form unless -mpower4 has been given, or -many and the two
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+ operand form of mfcr was used. */
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+ else if ((value & -value) == value
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+ && ((dialect & PPC_OPCODE_POWER4) != 0
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+ || ((dialect & PPC_OPCODE_ANY) != 0
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+ && (insn & (0x3ff << 1)) == 19 << 1)))
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insn |= 1 << 20;
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/* Any other value on mfcr is an error. */
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