MicroTESK

Done. Example:

#
# The code below specifies an instruction sequence that writes a value
# to the specified register (target) via the REG addressing mode.
#
# Default preparator: It is used when no special case previded below
# is applicable.
#
preparator(:target => 'REG') {
  lui  target, value(16, 31)
  addi target, target, value(0, 15)
}

#
# Special case: Target is $zero register. Since it is read only and
# always equal zero, it makes no sence to initialize it.
#
preparator(:target => 'REG', :arguments => {:i => 0}) {
  # Empty
}

#
# Special case: Value equals 0x00000000. In the case, it is
# more convenient to use $zero register to reset the target.
#
preparator(:target => 'REG', :mask => "00000000") {
  OR target, zero, zero
}

#
# Special case: Higher half of value is filled with zeros. In this case,
# only one initializing instruction is enough.
#
preparator(:target => 'REG', :mask => "0000XXXX") {
  addi target, zero, value(0, 15)
}

#
# Special case: Lower half of value is filled with zeros. In this case,
# only one initializing instruction is enough.
#
preparator(:target => 'REG', :mask => "XXXX0000") {
  lui target, value(16, 31)
}