RO Finding Position of Most Significant Bit The positions of bits in a 32-bit register are...
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RO Finding Position of Most Significant Bit The positions of bits in a 32-bit register are counted from the least significant (rightmost) bit. Thus the first bit is 0, the next is 1, and the last is 31. A bit positions are: 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Complete the following ARM assembly routine, bit_pos that returns the position of the most significant bit that is 1. The can be done by expressing the value as a binary number, and counting from the right starting at 0, until the most significant bit is found. Some examples are: . 100100 first bit is at position 5 . 11 first bit is at position 1 • 1 first bit is at position 0 . O first bit is at position-1, no 1 in the value . 111100100 first bit is at position 8 Exercise 4 [5.0] Editor .arch armv4 syntax unified .text bit_pos: align 2 type -global bit pos mov pc, 1r. test, function Test Bench Simulation Output LOCK Run RO Finding Position of Most Significant Bit The positions of bits in a 32-bit register are counted from the least significant (rightmost) bit. Thus the first bit is 0, the next is 1, and the last is 31. A bit positions are: 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Complete the following ARM assembly routine, bit_pos that returns the position of the most significant bit that is 1. The can be done by expressing the value as a binary number, and counting from the right starting at 0, until the most significant bit is found. Some examples are: . 100100 first bit is at position 5 . 11 first bit is at position 1 • 1 first bit is at position 0 . O first bit is at position-1, no 1 in the value . 111100100 first bit is at position 8 Exercise 4 [5.0] Editor .arch armv4 syntax unified .text bit_pos: align 2 type -global bit pos mov pc, 1r. test, function Test Bench Simulation Output LOCK Run
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Heres the complete ARM assembly routine for finding the position of the most significant bit that is 1 Explanation The bitpos routine takes a single input value in r0 and returns the position of the m... View the full answer
Related Book For
Probability and Random Processes With Applications to Signal Processing and Communications
ISBN: 978-0123869814
2nd edition
Authors: Scott Miller, Donald Childers
Posted Date:
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