Operations

This document outlines the GPU operations supported in TFHE-rs.

The GPU backend includes the following operations for both signed and unsigned encrypted integers:

name	symbol	Enc/Enc	Enc/ Int
Neg	-	✔️	N/A
Add	+	✔️	✔️
Sub	-	✔️	✔️
Mul	*	✔️	✔️
Div	/	✔️	✔️
Rem	%	✔️	✔️
Not	!	✔️	N/A
BitAnd	&	✔️	✔️
BitOr	|	✔️	✔️
BitXor	^	✔️	✔️
Shr	>>	✔️	✔️
Shl	<<	✔️	✔️
Rotate right	rotate_right	✔️	✔️
Rotate left	rotate_left	✔️	✔️
Min	min	✔️	✔️
Max	max	✔️	✔️
Greater than	gt	✔️	✔️
Greater or equal than	ge	✔️	✔️
Lower than	lt	✔️	✔️
Lower or equal than	le	✔️	✔️
Equal	eq	✔️	✔️
Not Equal	ne	✔️	✔️
Cast (into dest type)	cast_into	✔️	N/A
Cast (from src type)	cast_from	✔️	N/A
Ternary operator	select	✔️	✖️
Integer logarithm	ilog2	✔️	N/A
Count trailing/leading ones	leading_zeros	✔️	N/A
Count trailing/leading zeros	leading_ones	✔️	N/A
Oblivious Pseudo Random Generation	oprf	✔️	N/A

All operations follow the same syntax as the one described in here.