(as) M68HC11-Opts

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(as) M68HC11-Dependent

(as) M68HC11-Syntax

 
 9.22.1 M68HC11 and M68HC12 Options
 ----------------------------------
 
 The Motorola 68HC11 and 68HC12 version of `as' have a few machine
 dependent options.
 
 `-m68hc11'
      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.
 
 `-m68hc12'
      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 few 68HC11 instructions are
      replaced by some 68HC12 instructions as recommended by Motorola
      specifications.
 
 `-m68hcs12'
      This option switches the assembler in the M68HCS12 mode.  This
      mode is similar to `-m68hc12' but specifies to assemble for the
      68HCS12 series.  The only difference is on the assembling of the
      `movb' and `movw' instruction when a PC-relative operand is used.
 
 `-mshort'
      This option controls the ABI and indicates to use a 16-bit integer
      ABI.  It has no effect on the assembled instructions.  This is the
      default.
 
 `-mlong'
      This option controls the ABI and indicates to use a 32-bit integer
      ABI.
 
 `-mshort-double'
      This option controls the ABI and indicates to use a 32-bit float
      ABI.  This is the default.
 
 `-mlong-double'
      This option controls the ABI and indicates to use a 64-bit float
      ABI.
 
 `--strict-direct-mode'
      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.
 
 `--short-branches'
      The `--short-branches' 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
      branches 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.
 
 `--force-long-branches'
      The `--force-long-branches' 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.
 
 `--print-insn-syntax'
      You can use the `--print-insn-syntax' option to obtain the syntax
      description of the instruction when an error is detected.
 
 `--print-opcodes'
      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.
 
 `--generate-example'
      The `--generate-example' option is similar to `--print-opcodes'
      but it generates an example for each instruction instead.
 

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