l12_handouts_2up - ECE 3140/CS 3420 Computer Organization...

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1 ECE 3140/CS 3420 Computer Organization Spring 2009 Multi-cycle Datapaths Carry Look Ahead Adders ECE3140/CS3420 Announcements • Homework 3 has been posted – Due TODAY, 10:00pm • Homework 4 Homework 4 – Verilog problems from HW3 & some datapath problems • Project 3 has been posted – Due Tue., Mar 24 10:00pm, but don’t delay starting! – If you need a partner, come up to front of room after ECE3140/CS3420 class and/or post to newsgroup • Prelim 1 – March 12 @ 7:30pm – Phillips 101 and Phillips 203
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2 Annoucements • Regrade requests – HW1 and Project 1 must be submitted to CMS by Friday, Mar 6 – HW2 grades have been released; regrade requests due Tuesday March 10 – All regrade requests must be made through CMS within one week of the release of the ECE3140/CS3420 grades. 3 Hennessy and Patterson • Past Readings – 1.1-1.9, 2.1 through 2.14 – MIPS Calling Convention Document (website) – Notes on Programming in C (website) – 3.1 through 3.5 – B.1-B.6, B.10, C.1-C.10 • Current Readings – 4.1 through 4.4 – 4.5 through 4.8 (for Thursday) ECE3140/CS3420 – 4.9 (Skim) 4
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3 Simple Single Cycle Datapath IF ID MEM WB EX Brch 4 [15:11] [20:16] [25:21] Inst Mem Iaddr Iin [15:11] Reg File RA RB A B W RW WE Ctrl P C [15:0] 0 1 ExtImm A L U Data Mem Daddr Dout Din DMC 0 1 [10:6] 0 1 0 1 <<2 ECE3140/CS3420 [20:16] 0 1 add, sub, and, or, xor, nor, slt, beq, bne, blez, bgtz, bltz, bgez, addi, slti, andi, ori, xori, lw, sw, sll, srl, sra Control Unit Improvements? • How can we do better? • What are the limitations of this design? • What will limit it’s speed? • Why don’t we just stop here?
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l12_handouts_2up - ECE 3140/CS 3420 Computer Organization...

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