cqto
Convert Quadword to Octoword
CQTO
Sign-extends RAX into RDX:RAX (also CQO).
Details
The Convert Quadword to Octoword instruction sign-extends RAX into RDX:RAX (also CQO).
Pseudocode Operation
// Sign-extends RAX into RDX:RAX (also CQO)Example
CQTO
Encoding
Binary Layout
48
+0
99
+1