#include .code64 PUBLIC __getfpcw87 FUNC __getfpcw87 sub rsp, 8 .ENDPROLOG stmxcsr [rsp] mov rax, [rsp] add rsp, 8 ret ENDFUNC PUBLIC __setfpcw87 FUNC __setfpcw87 mov qword ptr [rsp + 8], rcx .ENDPROLOG ldmxcsr [rsp + 8] ret ENDFUNC END