Using the GNU Compiler Collection (GCC): MicroBlaze Options

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#### 3.17.24 MicroBlaze Options

`-msoft-float`

  Use software emulation for floating point (default).

`-mhard-float`

  Use hardware floating-point instructions.

`-mmemcpy`

  Do not optimize block moves, use `memcpy`.

`-mno-clearbss`

  This option is deprecated. Use `-fno-zero-initialized-in-bss` instead.

`-mcpu=cpu-type`

  Use features of, and schedule code for, the given CPU. Supported values are in the format ‘`vX.YY.Z`’, where X is a major version, YY is the minor version, and Z is compatibility code. Example values are ‘`v3.00.a`’, ‘`v4.00.b`’, ‘`v5.00.a`’, ‘`v5.00.b`’, ‘`v5.00.b`’, ‘`v6.00.a`’.

`-mxl-soft-mul`

  Use software multiply emulation (default).

`-mxl-soft-div`

  Use software emulation for divides (default).

`-mxl-barrel-shift`

  Use the hardware barrel shifter.

`-mxl-pattern-compare`

  Use pattern compare instructions.

`-msmall-divides`

  Use table lookup optimization for small signed integer divisions.

`-mxl-stack-check`

  This option is deprecated. Use `-fstack-check` instead.

`-mxl-gp-opt`

  Use GP-relative `.sdata`/`.sbss` sections.

`-mxl-multiply-high`

  Use multiply high instructions for high part of 32x32 multiply.

`-mxl-float-convert`

  Use hardware floating-point conversion instructions.

`-mxl-float-sqrt`

  Use hardware floating-point square root instruction.

`-mbig-endian`

  Generate code for a big-endian target.

`-mlittle-endian`

  Generate code for a little-endian target.

`-mxl-reorder`

  Use reorder instructions (swap and byte reversed load/store).

`-mxl-mode-app-model`

  Select application model app-model. Valid models are

  ‘`executable`’

    normal executable (default), uses startup code `crt0.o`.

  ‘`xmdstub`’

    for use with Xilinx Microprocessor Debugger (XMD) based software intrusive debug agent called xmdstub. This uses startup file `crt1.o` and sets the start address of the program to 0x800.

  ‘`bootstrap`’

    for applications that are loaded using a bootloader. This model uses startup file `crt2.o` which does not contain a processor reset vector handler. This is suitable for transferring control on a processor reset to the bootloader rather than the application.

  ‘`novectors`’

    for applications that do not require any of the MicroBlaze vectors. This option may be useful for applications running within a monitoring application. This model uses `crt3.o` as a startup file.

  Option `-xl-mode-app-model` is a deprecated alias for `-mxl-mode-app-model`.

Next: MIPS Options, Previous: MeP Options, Up: Submodel Options [Contents][Index]