On Sunday, 30 September 2018 at 12:32:08 UTC, kinke wrote:
1) `asm {}` is supported by DMD and LDC, but not by GDC.
Good to know.
Guess I will be targeting DMD and LDC then.
4) For x86_64, there are 2 (completely different) ABIs, Win64
and the System V one. Specs can be found online.
In your case:
void Foo(MyStrunct* first_arg, MyStrunct* second_arg)
{
asm { naked; }
version (D_InlineAsm_X86)
{
// first_arg is on the stack, at [ESP+4]
// second_arg is in EAX
}
else version (D_InlineAsm_X86_64)
{
version (Win64)
{
// first_arg is in RDX
// second_arg is in RCX
}
else
{
// first_arg is in RSI
// second_arg is in RDI
}
}
}
So in X86 asm, if I want to pas two parameters to a function I
can have one in a register, but not two. The second will go via
the stack. But on X86_64 it won't?
Guess I'll just have to live with that.
Thank you!
