6.61.4. MeP Pragmas

6.61.4 MeP Pragmas

custom io_volatile (on|off)

Overrides the command-line option -mio-volatile for the current file. Note that for compatibility with future GCC releases, this option should only be used once before any io variables in each file.

GCC coprocessor available registers

Specifies which coprocessor registers are available to the register allocator. registers may be a single register, register range separated by ellipses, or comma-separated list of those. Example:

#pragma GCC coprocessor available $c0...$c10, $c28

GCC coprocessor call_saved registers

Specifies which coprocessor registers are to be saved and restored by any function using them. 登录查看完整内容