Developer Guide and Reference

Contents

regcall, Qregcall

Tells the compiler that the __regcall calling convention should be used for functions that do not directly specify a calling convention.

Syntax

Linux:
-regcall
macOS:
-regcall
Windows:
/Qregcall
Arguments
None
Default
OFF
The __regcall calling convention will only be used if a function explicitly specifies it.
Description
This option tells the compiler that the __regcall calling convention should be used for functions that do not directly specify a calling convention. This calling convention ensures that as many values as possible are passed or returned in registers.
It ensures that __regcall is the default calling convention for functions in the compilation, unless another calling convention is specified in a declaration.
This calling convention is ignored if it is specified for a function with variable arguments.
Note that all __regcall functions must have prototypes.
Alternate Options
None