Using the GNU Compiler Collection (GCC): NDS32 Options

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#### 3.17.30 NDS32 Options

These options are defined for NDS32 implementations:

`-mbig-endian`

  Generate code in big-endian mode.

`-mlittle-endian`

  Generate code in little-endian mode.

`-mreduced-regs`

  Use reduced-set registers for register allocation.

`-mfull-regs`

  Use full-set registers for register allocation.

`-mcmov`

  Generate conditional move instructions.

`-mno-cmov`

  Do not generate conditional move instructions.

`-mperf-ext`

  Generate performance extension instructions.

`-mno-perf-ext`

  Do not generate performance extension instructions.

`-mv3push`

  Generate v3 push25/pop25 instructions.

`-mno-v3push`

  Do not generate v3 push25/pop25 instructions.

`-m16-bit`

  Generate 16-bit instructions.

`-mno-16-bit`

  Do not generate 16-bit instructions.

`-misr-vector-size=num`

  Specify the size of each interrupt vector, which must be 4 or 16.

`-mcache-block-size=num`

  Specify the size of each cache block, which must be a power of 2 between 4 and 512.

`-march=arch`

  Specify the name of the target architecture.

`-mcmodel=code-model`

  Set the code model to one of

  ‘`small`’

    All the data and read-only data segments must be within 512KB addressing space. The text segment must be within 16MB addressing space.

  ‘`medium`’

    The data segment must be within 512KB while the read-only data segment can be within 4GB addressing space. The text segment should be still within 16MB addressing space.

  ‘`large`’

    All the text and data segments can be within 4GB addressing space.

`-mctor-dtor`

  Enable constructor/destructor feature.

`-mrelax`

  Guide linker to relax instructions.

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