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Certain pseudo opcodes are permitted. They are for branch instructions. They expand to the shortest branch instruction that reaches the target. Generally these mnemonics are made by substituting `j' for `b' at the start of a DEC mnemonic. This feature is included both for compatibility and to help compilers. If you do not need this feature, avoid these opcodes. Here are the mnemonics, and the code they can expand into.
jbsb
jbr
jr
j
CONDneq
, nequ
, eql
, eqlu
, gtr
,
geq
, lss
, gtru
, lequ
, vc
, vs
,
gequ
, cc
, lssu
, cs
.
COND may also be one of the bit tests
bs
, bc
, bss
, bcs
, bsc
, bcc
,
bssi
, bcci
, lbs
, lbc
.
NOTCOND is the opposite condition to COND.
jacb
Xb d f g h l w
.
OPCODE ..., foo ; brb bar ; foo: jmp ... ; bar:
jaob
YYYlss leq
.
jsob
ZZZgeq gtr
.
OPCODE ..., foo ; brb bar ; foo: brw destination ; bar:
OPCODE ..., foo ; brb bar ; foo: jmp destination ; bar:
aobleq
aoblss
sobgeq
sobgtr
OPCODE ..., foo ; brb bar ; foo: brw destination ; bar:
OPCODE ..., foo ; brb bar ; foo: jmp destination ; bar: