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

XORCY_L

XOR for Carry Logic with Local 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_L is a special XOR with local LO output used for generating faster and smaller arithmetic functions. The LO output is used to connect to another output within the same CLB slice.

See also “XORCY” an d “XORCY_D.”