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What is the c-code for the following ARM assembly code? data .text .global count_ones count_ones: mov x0, x1 // x0 = n mov w1, #0 // w1 = count mov x2, #1 // x2 = mask loop: and x3, x0, x2 // x3 = n & mask cmp x3, x2 b.ne skip add wl, w1, #1 // increment count skip: Isl x2, x2, #1 // compare n & mask to mask // if not equal, skip incrementing count cmp x2, x0 b.lt loop mov x0, w1 ret // shift mask left by 1 bit // compare mask to n // if mask is less than n, loop // return count in x0

What is the c-code for the following ARM assembly code? data .text .global count_ones count_ones: mov x0, x1 // x0 = n mov w1, #0 // w1 = count mov x2, #1 // x2 = mask loop: and x3, x0, x2 // x3 = n & mask cmp x3, x2 b.ne skip add wl, w1, #1 // increment count skip: Isl x2, x2, #1 // compare n & mask to mask // if not equal, skip incrementing count cmp x2, x0 b.lt loop mov x0, w1 ret // shift mask left by 1 bit // compare mask to n // if mask is less than n, loop // return count in x0

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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What is the c-code for the following ARM assembly code? data .text .global count_ones count_ones: mov x0, x1 //x0 = n mov w1, #0 // w1 = count mov x2, #1 // x2 = mask loop: and x3, x0, x2 // x3 = n & mask cmp x3, x2 b.ne skip add wl, w1, #1 // increment count skip: Isl x2, x2, #1 // compare n & mask to mask // if not equal, skip incrementing count cmp x2, x0 b.lt loop mov x0, wl ret // shift mask left by 1 bit // compare mask to n // if mask is less than n, loop // return count in x0
Transcribed Image Text:What is the c-code for the following ARM assembly code? data .text .global count_ones count_ones: mov x0, x1 //x0 = n mov w1, #0 // w1 = count mov x2, #1 // x2 = mask loop: and x3, x0, x2 // x3 = n & mask cmp x3, x2 b.ne skip add wl, w1, #1 // increment count skip: Isl x2, x2, #1 // compare n & mask to mask // if not equal, skip incrementing count cmp x2, x0 b.lt loop mov x0, wl ret // shift mask left by 1 bit // compare mask to n // if mask is less than n, loop // return count in x0
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