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(as.info)M68HC11-Opts

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M68HC11 and M68HC12 Options
---------------------------

   The Motorola 68HC11 and 68HC12 version of `as' has a few machine
dependent options.

   This option switches the assembler in the M68HC11 mode. In this mode,
the assembler only accepts 68HC11 operands and mnemonics. It produces
code for the 68HC11.

   This option switches the assembler in the M68HC12 mode. In this mode,
the assembler also accepts 68HC12 operands and mnemonics. It produces
code for the 68HC12. A fiew 68HC11 instructions are replaced by some
68HC12 instructions as recommended by Motorola specifications.

   You can use the `--strict-direct-mode' option to disable the
automatic translation of direct page mode addressing into extended mode
when the instruction does not support direct mode.  For example, the
`clr' instruction does not support direct page mode addressing. When it
is used with the direct page mode, `as' will ignore it and generate an
absolute addressing.  This option prevents `as' from doing this, and
the wrong usage of the direct page mode will raise an error.

   The `--short-branchs' option turns off the translation of relative
branches into absolute branches when the branch offset is out of range.
By default `as' transforms the relative branch (`bsr', `bgt', `bge',
`beq', `bne', `ble', `blt', `bhi', `bcc', `bls', `bcs', `bmi', `bvs',
`bvs', `bra') into an absolute branch when the offset is out of the
-128 .. 127 range.  In that case, the `bsr' instruction is translated
into a `jsr', the `bra' instruction is translated into a `jmp' and the
conditional branchs instructions are inverted and followed by a `jmp'.
This option disables these translations and `as' will generate an error
if a relative branch is out of range. This option does not affect the
optimization associated to the `jbra', `jbsr' and `jbXX' pseudo opcodes.

   The `--force-long-branchs' option forces the translation of relative
branches into absolute branches. This option does not affect the
optimization associated to the `jbra', `jbsr' and `jbXX' pseudo opcodes.

   You can use the `--print-insn-syntax' option to obtain the syntax
description of the instruction when an error is detected.

   The `--print-opcodes' option prints the list of all the instructions
with their syntax. The first item of each line represents the
instruction name and the rest of the line indicates the possible
operands for that instruction. The list is printed in alphabetical
order. Once the list is printed `as' exits.

   The `--generate-example' option is similar to `--print-opcodes' but
it generates an example for each instruction instead.