AMD has an ABI specification that describes the calling convention to use on x86-64. All OSes follow it, except for Windows which has it's own x86-64 calling convention. Why?
Does anyone know the technical, historical, or political reasons for this difference, or is it purely a matter of NIHsyndrome?
I understand that different OSes may have different needs for higher level things, but that doesn't explain why for example the register parameter passing order on Windows is rcx - rdx …
fastcall调用约定是否真的比其他调用约定更快,例如cdecl？是否有任何基准测试表明调用约定会影响性能？