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xdais规则检测中的错误信息不理解

程序中使用了 a = -b这样的语句,编译可以通过,但是运行Qualiti检测时,第一条就无法通过,提示

Test failed. Problem: External object '_negd' is non-compliant as it does not have the "<MODULE>_SUOWEI_" (i.e. "module_vendor_") prefix.

但是改成 a = 0 - b 就ok,这种使用方式感觉很奇怪;

另外使用开方函数sqrt也会有这样的错误

Test failed. Problem: External object 'sqrt' is non-compliant as it does not have the "<MODULE>_SUOWEI_" (i.e. "module_vendor_") prefix.