EECE 353: Digital Systems Design Lecture 10: Datapath ... - Courses

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Now build a network of these building blocks: This will sort four numbers of any bit-width in one cycle Problems: - Gets big if there are more numbers to sort Best known: O (n log n) blocks for n inputs - Can’t use this if n is arbitrary (not known when the chip is designed) Lecture 10, Page 32
Suppose we want to sort k numbers: for (i=0 to k-2) do A = Ri; for (j=i+1 to k-1) do B = Rj if (B < A) then Ri = B Rj = A A = Ri end if; end for; end for; Lecture 10, Page 33
Page 1 and 2: EECE 353: Digital Systems Design Le
Page 3 and 4: Real Systems All but the simplest s
Page 5 and 6: Exponent: A bit more complicated Wh
Page 7 and 8: Consider this simple datapath: If w
Page 9 and 10: We have to let this run for A cycle
Page 11 and 12: Here is a simple controller that do
Page 13 and 14: library ieee; use ieee.std_logic_11
Page 15 and 16: process(clk) begin if (clk’event
Page 17 and 18: Lecture 10, Page 17
Page 19 and 20: Top level diagram of what we will b
Page 21 and 22: State Machine: Lecture 10, Page 21
Page 23 and 24: Serial Multiplier Suppose we want t
Page 25 and 26: Top level diagram of what we will b
Page 27 and 28: State Machine: Lecture 10, Page 27
Page 29 and 30: This datapath looks something like
Page 31: Fully-Parallel Sorting First consid
Page 35 and 36: Lecture 10, Page 35
Page 37 and 38: Assume that the values to be sorted
Page 39 and 40: State S2: Load Register A with Ri a
Page 41 and 42: State S4: Load value of Rj into B 1
Page 43 and 44: State S5: A and B are compared, and
Page 45 and 46: State 6: Swap Ri and Rj (part 1) 0
Page 47 and 48: State S7: Swap Ri and Rj (part 2) 1
Page 49 and 50: State S8: Load A from Ri 1 0 Lectur
Page 51 and 52: State S8: S9 S1 S2 S8 S3 S7 S4 S5 L
Page 53 and 54: An alternative datapath: Tri-state
Page 55: Summary of this very long lecture W

EECE 353: Digital Systems Design Lecture 10: Datapath ... - Courses

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