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__attribute__((pcs("calling_convention"))) function attribute

This function attribute specifies the calling convention on targets with hardware floating-point, as an alternative to the __softfp keyword.


This function attribute is a GNU compiler extension that the ARM compiler supports.

__attribute__((pcs(" calling_convention ")))

Where calling_convention is one of the following:


uses integer registers, as for __softfp .


uses floating-point registers.