Intel i86W Manual page 208

INSTRUCTION SET SUMMARY
subu isrcl, isrc2, idest ................................................................................ Subtract Unsigned
idest
~
isrcl - isrc2
OF
~
NOT (bit 31 carry)
CC ~ bit 31 carry
(i.e. CC set if isrc2
S;
isrcl (unsigned)
CC clear if isrc2 > isrcl (unsigned»
trap
isrclni, isrc2, idest ...................................................................................... Software Trap
·Generate trap with IT set in
psr
unlock ............................................................................................. End Interlocked Sequence
Clear BL in dirbase.
The next load or store unlocks the bus.
Interrupts are enabled.
xor
isrcl, isrc2, idest .............................................................................. Logical Exclusive OR
idest
~
isrcl XOR isrc2
CC set if result is zero, cleared otherwise
xorh
#const, isrc2, idest ............................................................... Logical Exclusive OR High
idest
~
(#const shifted left 16 bits) XOR isrc2
CC set if result is zero, cleared otherwise
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