With SSE version 4.2, four compare-string instructions were introduced: two instructions for strings with implicit lengths and two instructions for strings with explicit lengths. Two of these four instructions use masks.
A string with an implicit length is a string with a terminating 0. For a string with an explicit length, the length has to be specified by some other means.
In this chapter, we will spend some time with SSE strings, because the compare instructions are a bit complicated and unusual, especially when using masks. Here are the instructions:
String | Instruction | arg1 | arg2 | arg3 ... |
|---|
