| regparm, stkparm

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Syntax: regparm [(regcount)] / stkparm
The `regparm` attribute causes the function to use regcount data registers and regcount address registers for parameters. `stkparm` means the exact opposite, i.e. all parameters are passed on the stack. The '-mregparm' switch specifies which one is the default, and the default for regcount.

See also: Specifying Registers for Function Parameters