[PR 2494] PDP-11: Wrong opcode for SEC/CLC

[Jan-Benedict Glaw]

Hi Sergey, hi list readers!

I was asked to have a look at
http://sourceware.org/bugzilla/show_bug.cgi?id=2494 .  The bug
reporter complains about SEC (set carry) being used by his assembler,
but the final output generates CLC (clear carry.)  This preliminary
patch should fix it, but it's untested (and I'm not actually a PDP11
maintainer.)  The new opcode was taken out of my "VAX Architecture
Reference Manual", EY-3459E-DP, 0-932376-86-X, p. 326 (PDP-11
Compatibility Mode, Condition Code Operators.)

I actually do not have a PDP-11 (unfortunately:-)  and AFAIK all my
VAXen are too new and don't come along with hardware PDP-11
compatibility, nor do I have any PDP-11 software to test this with,
so Sergey, could you please give it a run?

MfG, JBG

2006-03-31  Jan-Benedict Glaw  <jbglaw@lug-owl.de>

	opcodes/
	* pdp11-opc.c (pdp11_opcodes): Correct binary representation of SEC.

diff -Nurp src-binutils-fresh/opcodes/pdp11-opc.c src-binutils-hacked/opcodes/pdp11-opc.c
--- src-binutils-fresh/opcodes/pdp11-opc.c	2005-05-07 09:34:30.000000000 +0200
+++ src-binutils-hacked/opcodes/pdp11-opc.c	2006-03-31 10:13:39.000000000 +0200
@@ -50,7 +50,7 @@ const struct pdp11_opcode pdp11_opcodes[
   { "cl_e",	0x00ae,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },
   { "ccc",	0x00af,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },
   { "se_0",	0x00b0,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },
-  { "sec",	0x00a1,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },
+  { "sec",	0x00b1,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },
   { "sev",	0x00b2,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },
   { "se_3",	0x00b3,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },
   { "sez",	0x00b4,	0xffff, PDP11_OPCODE_NO_OPS,	PDP11_BASIC },

-- 
Jan-Benedict Glaw       jbglaw@lug-owl.de    . +49-172-7608481             _ O _
"Eine Freie Meinung in  einem Freien Kopf    | Gegen Zensur | Gegen Krieg  _ _ O
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ret = do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA));
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