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#### 8.28.1 Options

`as` has following command-line options for the Renesas (formerly Hitachi) / SuperH SH family.

`--little`
  Generate little endian code.
`--big`
  Generate big endian code.
`--relax`
  Alter jump instructions for long displacements.
`--small`
  Align sections to 4 byte boundaries, not 16.
`--dsp`
  Enable sh-dsp insns, and disable sh3e / sh4 insns.
`--renesas`
  Disable optimization with section symbol for compatibility with Renesas assembler.
`--allow-reg-prefix`
  Allow '$' as a register name prefix.
`--isa=sh4 | sh4a`
  Specify the sh4 or sh4a instruction set.
`--isa=dsp`
  Enable sh-dsp insns, and disable sh3e / sh4 insns.
`--isa=fp`
  Enable sh2e, sh3e, sh4, and sh4a insn sets.
`--isa=all`
  Enable sh1, sh2, sh2e, sh3, sh3e, sh4, sh4a, and sh-dsp insn sets.