gcc: Nios II Function Attributes

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1 6.31.21 Nios II Function Attributes
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1 These function attributes are supported by the Nios II back end:
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1 'target (OPTIONS)'
1      As discussed in ⇒Common Function Attributes, this attribute
1      allows specification of target-specific compilation options.
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1      When compiling for Nios II, the following options are allowed:
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1      'custom-INSN=N'
1      'no-custom-INSN'
1           Each 'custom-INSN=N' attribute locally enables use of a custom
1           instruction with encoding N when generating code that uses
1           INSN.  Similarly, 'no-custom-INSN' locally inhibits use of the
1           custom instruction INSN.  These target attributes correspond
1           to the '-mcustom-INSN=N' and '-mno-custom-INSN' command-line
11           options, and support the same set of INSN keywords.  ⇒
           Nios II Options, for more information.
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1      'custom-fpu-cfg=NAME'
1           This attribute corresponds to the '-mcustom-fpu-cfg=NAME'
1           command-line option, to select a predefined set of custom
1           instructions named NAME.  ⇒Nios II Options, for more
1           information.
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