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goblin_rocksled · Feb 22nd, 2007, 8:09 PM

Hi! I've been trying to solve this simple problem using shifting operation in MIPS. However, I'm not really sure if I sure really use an operand like "ori" and "and". This problem kind of confuses me...

Given a 32 bit binary sequence a31a30��..a2a1a0 in a register say s0. I would like
to extract the sequence ai��.aj (with i>j, 0 < i <=32, 0 <= j < 32) and place them in the
least significant bits of another register say t0. Write the sequence of MIPS instructions
that allows one to do that. Also assume that i is available in register s1 and j is s2.

Feb 22nd, 2007, 8:09 PM	#1
goblin_rocksled Newbie Join Date: Feb 2007 Posts: 1 Rep Power: 0	extract the sequence in MIPS Hi! I've been trying to solve this simple problem using shifting operation in MIPS. However, I'm not really sure if I sure really use an operand like "ori" and "and". This problem kind of confuses me... Given a 32 bit binary sequence a31a30��..a2a1a0 in a register say s0. I would like to extract the sequence ai��.aj (with i>j, 0 < i <=32, 0 <= j < 32) and place them in the least significant bits of another register say t0. Write the sequence of MIPS instructions that allows one to do that. Also assume that i is available in register s1 and j is s2.