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====== Function LOGTEST ====== ====Syntax==== * **logtest** //integer-1 integer-2// → //generalized-boolean// ====Arguments and Values==== * //integer-1// - an //[[CL:Glossary:integer]]//. * //integer-2// - an //[[CL:Glossary:integer]]//. * //generalized-boolean// - a //[[CL:Glossary:generalized boolean]]//. ====Description==== Returns //[[CL:Glossary:true]]// if any of the bits designated by the 1's in //integer-1// is 1 in //integer-2//; otherwise it is //[[CL:Glossary:false]]//. //integer-1// and //integer-2// are treated as if they were binary. Negative //integer-1// and //integer-2// are treated as if they were represented in two's-complement binary. ====Examples==== <blockquote> (logtest 1 7) <r>//[[CL:Glossary:true]]// </r> (logtest 1 2) <r>//[[CL:Glossary:false]]// </r> (logtest -2 -1) <r>//[[CL:Glossary:true]]//</r> (logtest 0 -1) <r>//[[CL:Glossary:false]]// </r> </blockquote> ====Side Effects==== None. ====Affected By==== None. ====Exceptional Situations==== Should signal an error of type type-error if //integer-1// is not an //[[CL:Glossary:integer]]//. Should signal an error of type type-error if //integer-2// is not an //[[CL:Glossary:integer]]//. ====See Also==== None. ====Notes==== <blockquote> (logtest //x// //y//) ≡ ([[CL:Functions:not]] ([[CL:Functions:zerop]] ([[CL:Functions:logand]] //x// //y//))) </blockquote>