Working on the locore for NetBSD, we succeeded in finding a bug in gas for
VAX. It wouldn't assemble the branch on bit instructions correctly.
The relevant lines to change are in the architecture file 'vax-opcode.h'.
The lines for the 'bb' instructions are there;

{    "bbs",     {"rlabbb",              0xe0    } },
{    "bbc",     {"rlabbb",              0xe1    } },
{    "bbss",    {"rlabbb",              0xe2    } },
{    "bbcs",    {"rlabbb",              0xe3    } },
{    "bbsc",    {"rlabbb",              0xe4    } },
{    "bbcc",    {"rlabbb",              0xe5    } },
{    "bbssi",   {"rlabbb",              0xe6    } },
{    "bbcci",   {"rlabbb",              0xe7    } },

...but should really be...

{    "bbs",     {"rlvbbb",              0xe0    } },
{    "bbc",     {"rlvbbb",              0xe1    } },
{    "bbss",    {"rlvbbb",              0xe2    } },
{    "bbcs",    {"rlvbbb",              0xe3    } },
{    "bbsc",    {"rlvbbb",              0xe4    } },
{    "bbcc",    {"rlvbbb",              0xe5    } },
{    "bbssi",   {"rlvbbb",              0xe6    } },
{    "bbcci",   {"rlvbbb",              0xe7    } },

A bug report for this has been sent to gnu.

Does this bug not being discovered mean the good old art of hand coding vax 
assembler is dead? :-)

					/ ic

					Joachim Isaksson
					(ic@luddluth.se)

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