Nios II Function Attributes#
These function attributes are supported by the Nios II back end:
- target (options)#
As discussed in Common Function Attributes, this attribute allows specification of target-specific compilation options.
When compiling for Nios II, the following options are allowed:
custom-insn=N
no-custom-insn
Each
custom-insn=N
attribute locally enables use of a custom instruction with encodingN
when generating code that usesinsn
. Similarly,no-custom-insn
locally inhibits use of the custom instructioninsn
. These target attributes correspond to the-mcustom-insn=N
and-mno-custom-insn
command-line options, and support the same set ofinsn
keywords. See Nios II Options, for more information.custom-fpu-cfg=name
This attribute corresponds to the
-mcustom-fpu-cfg=name
command-line option, to select a predefined set of custom instructions namedname
. See Nios II Options, for more information.