What is the shortest sequence of MIPS instructions that extracts a field for the constant values of bits 7-21 (inclusive) from register $t0 and places it in the lower order portion of register $t3 (zero filled otherwise) ?

Question

Darian Villarreal

Computers & Technology

31 August, 02:12

What is the shortest sequence of MIPS instructions that extracts a field for the constant values of bits 7-21 (inclusive) from register $t0 and places it in the lower order portion of register $t3 (zero filled otherwise) ?

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Beast · Answer 1

What is the shortest sequence of MIPS instructions that extracts a field for the constant values of bits 7-21 (inclusive) from register $t0 and places it in the lower order portion of register $t3 (zero filled otherwise) ? - sll$t0, $t3, 9# shift $t3 left by 9, store in $t0

srl $t0, $t0, 15# shift $t0 right by 15

Explanation:

The shortest sequence of MIPS instructions that extracts a field for the constant values of bits 7-21 (inclusive) from register $t0 and places it in the lower order portion of register $t3 (zero filled otherwise) is shown below:

sll$t0, $t3, 9# shift $t3 left by 9, store in $t0

srl $t0, $t0, 15# shift $t0 right by 15