On Sunday, 25 March 2018 at 10:58:37 UTC, Dave Jones wrote:
Is this stuff documented somewhere?
See https://dlang.org/spec/abi.html#function_calling_conventions. It defines the D calling convention for Win32 (int return value in EAX) and states that it matches the C calling convention on all other platforms [but note that the args are actually reversed].
Is the inline asm portable between compilers?
LDC supports the DMD-style inline asm too, GDC doesn't.