SingularityKChen/matrixsum

The lab 3 of CS250 in fall 13. Need to study the lab 2 discussion material of spring 17.

Some Changes:

• rocc.scala-> tile/LazyRoCC.scala
• nbdcache.scala->rocket/HellaCache.scala

Requirements:

• an n-by-n matrix consisting of 64-bit unsigned integers (maximum size = 64) FIX: up to 31 because the width of rs2 is 5 (pow(2,5)=32).

• access memory to fetch the relevant elements of the matrix

• return the sum of the relevant row sum and column sum to the core. If overflow, then return 2^64-1.

• record three partial column sums if any row sun is called firstly or vice versa.

• opcode: assume in custom 0 (inst[6:0]=00_010_11),

  INSTRUCTIONS	funct7	rs2	rs1	xd & xs1 & xs2	rd	opcode
  SETUP	0000000	?????	?????	011	?????	0001011
  ROWSUM	0000001	?????	?????	110	?????	0001011
  COLSUM	0000010	?????	?????	110	?????	0001011

• Submodules(original)

  • accumulator: to handle overflow, use a 65-bit adder.(FIX: 32-bit) If reach a overflow, signal the control

    

  • sum cache to storage the partial sums

    

  • control

    

• Submodules(mimic SHA3)