I am interested in whether stdcall uses SSE registers on x86, and if so, will it restore them, like ESI, EDI, EBP, EBX?
Does stdcall use SSE registers? And does he restore them?
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No.
As you mentioned, the Windows x86-32 ABI specifies that
EAX,EDX, andECXare available as "scratch" registers inside of the function (clobbered); all of the other general-purpose integer registers are preserved (i.e.,EBX,ESI,EDI,EBP, andEIP). This doesn't apply to SSE registers; only to general-purpose integer registers. All of the SSE registers are considered to be clobbered.