How to use a different calling convention for assembler routines?

[ibrumm@arcor.de]

Hi!

I have quite a lot routines written in assembler for the H8/3052.
They use the following calling convention:
- the first parameter is passed in ER6 (or R6 or R6L)
- other parameters are passed on the stack (the last one is written first on the stack)
- the result is returned in ER6 (or R6 or R6L)

Can GCC use a different calling convention?
How can I instruct GCC to use this calling convention for the assembler routines?

Best regards,
Ingmar Brumm

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