ASM lib and first parameter

[Denis]

Fred (or Freak), according SDK doc, when procedure returns a quad, we have to put it in 'eax' (low word) and 'edx' (high word)

My question is about first parameter

Is it possible to have a non standard call (not CDecl call) when the first param is a quad or a double (same as eax used to do that with 1st dword param or ST0 for float) ?