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Libraries Guide
Chapter 10: Design Elements (SOP3 to XORCY_L)

XORCY

XOR for Carry Logic with General Output

XC3000
XC4000E
XC4000X
XC5200
XC9000
Spartan
SpartanXL
Spartan2
Virtex
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Primitive
Primitive

XORCY is a special XOR with general O output used for generating faster and smaller arithmetic functions.

Its O output is a general interconnect. See also“XORCY_D” and “XORCY_L.”