9.9.1 Options

-march=archname

Assemble for architecture archname. The --help option lists valid values for archname.

-mcpu=cpuname

Assemble for architecture cpuname. The --help option lists valid values for cpuname.

-EL

-mlittle-endian

Generate little-endian output.

-EB

-mbig-endian

Generate big-endian output.

-fpic

-pic

Generate position-independent code.

-mljump

-mno-ljump

Enable/disable transformation of the short branch instructions jbf, jbt, and jbr to jmpi. This option is for V2 processors only. It is ignored on CK801 and CK802 targets, which do not support the jmpi instruction, and is enabled by default for other processors.

-mbranch-stub

-mno-branch-stub

Pass through R_CKCORE_PCREL_IMM26BY2 relocations for bsr instructions to the linker.

This option is only available for bare-metal C-SKY V2 ELF targets, where it is enabled by default. It cannot be used in code that will be dynamically linked against shared libraries.

-force2bsr

-mforce2bsr

-no-force2bsr

-mno-force2bsr

Enable/disable transformation of jbsr instructions to bsr. This option is always enabled (and -mno-force2bsr is ignored) for CK801/CK802 targets. It is also always enabled when -mbranch-stub is in effect.

-jsri2bsr

-mjsri2bsr

-no-jsri2bsr

-mno-jsri2bsr

Enable/disable transformation of jsri instructions to bsr. This option is enabled by default.

-mnolrw

-mno-lrw

Enable/disable transformation of lrw instructions into a movih/ori pair.

-melrw

-mno-elrw

Enable/disable extended lrw instructions. This option is enabled by default for CK800-series processors.

-mlaf

-mliterals-after-func

-mno-laf

-mno-literals-after-func

Enable/disable placement of literal pools after each function.

-mlabr

-mliterals-after-br

-mno-labr

-mnoliterals-after-br

Enable/disable placement of literal pools after unconditional branches. This option is enabled by default.

-mistack

-mno-istack

Enable/disable interrupt stack instructions. This option is enabled by default on CK801, CK802, and CK802 processors.

The following options explicitly enable certain optional instructions. These features are also enabled implicitly by using -mcpu= to specify a processor that supports it.

-mhard-float

Enable hard float instructions.

-mmp

Enable multiprocessor instructions.

-mcp

Enable coprocessor instructions.

-mcache

Enable cache prefetch instruction.

-msecurity

Enable C-SKY security instructions.

-mtrust

Enable C-SKY trust instructions.

-mdsp

Enable DSP instructions.

-medsp

Enable enhanced DSP instructions.

-mvdsp

Enable vector DSP instructions.