Hi Ray,

On Thu, Mar 12, 2020 at 12:21 PM Ni, Ray <ray.ni@intel.com> wrote:
> Does CompilerIntrinsicsLib exist because GCC doesn't support to disable
intrinsic?

It is not possible to disable all intrinsics on 32-bit ARM, and it's not
necessarily desirable to do so for AArch64 (so I don't think it's
implemented).

Note that this is somewhat true for x86 too - leading to things like
DivU64x32 in BaseLib.

> How does the linker find the CompilerInstrinsicsLib in linking phase?

For example:
https://github.com/tianocore/edk2/blob/master/MdeModulePkg/MdeModulePkg.dsc#L172

Regards,

Leif