+NSTTTTTSTN | JSR > 111101 (debug:printsignednumber)
+
+@ Shift all ones until a single one remains.
+SSTTN | PUSH -1
+SSSTTTTTTN | PUSH +63
+NSTTSTTSTN | JSR > 101101 (lshift)
+NSTTTTTSTN | JSR > 111101 (debug:printsignednumber)
+
+@ Shift all ones to all zeros.
+SSTTN | PUSH -1
+SSSTSSSSSSN | PUSH +64
+NSTTSTTSTN | JSR > 101101 (lshift)
+NSTTTTTSTN | JSR > 111101 (debug:printsignednumber)