A Vector-Like Reconfigurable Floating-Point Unit for the Logarithm

Table 5

Resources, performance, and accuracy of LAUs, VLAUs, and FPLogs.

Resources total	SP				DP
	LAU	VLAU	FPLog (red.)	FPLog (full)	LAU	VLAU	FPLog (red.)	FPLog (full)
Slice registers 58,800	932	1,864	782	992	970	1,912	809	2,568
Slice LUTs-58,800	551	1,099	712	873	634	1,107	735	1,910
Occupied slices-14,720	298	569	294	330	341	576	307	711
# 36 k block RAM-244	3	3	1	2	3	3	1	2
# 18 k block RAM-488	1	1	1	2	1	1	1	21
# DSP48Es-640	3	6	3	5	3	6	3	14
Frequency (MHz)	370	351	233	240	334	330	233	198
Latency	22	22	18	20	22	22	18	34
Results/cycle	1	2	1	1	1	2	1	1
Error	2^−17	2^−17	2^−17	2^−23	2^−17	2^−17	2^−17	2^−52