3.19.28 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’, ‘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.

‘-mpic-data-is-text-relative’

Assume that the displacement between the text and data segments is fixed at static link time. This allows data to be referenced by offset from start of text address instead of GOT since PC-relative addressing is not supported.

‘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.