Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Questions  >  Consider a new instruction named branch-on-bi... Start Learning for Free
Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.
Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated by
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider a new instruction named branch-on-bit-set (mnemonic bbs). The...
We want to check for a particular bit position say 2 (third from right). Let the number be 0xA2A7 (last 4 bits being 0111).
Here, the bit at position 2 from right is 1. So, we have to AND this with 0x0004 as any other flag would give wrong value
(may count other bits or discard the bit at position "pos"). And 0x0004 is obtained by 0x1 << 2 (by shifting 1 "pos" times
to the left we get a flag with 1 being set only for the "pos" bit position).
View all questions of this test
Most Upvoted Answer
Consider a new instruction named branch-on-bit-set (mnemonic bbs). The...
Let us understand through an example:
Here pos=3 and control jumps to Label=2000 as bit on 3rd position in ro is 1.
In alternate process,
Temp<- Mask && Reg
To implement "bbs", in mask variable only the respective position bit(pos) is set to 1 and remaining are 0's. So, AND oprn. reads the pos bit value only. 
So eliminate options where mask contains multiple 1's. Option (a) is correct.
Mask<-0x1<<pos
=> Mask<- 00000001<<3
=>Mask<-0000 1000
                  7654 3210
So at pos=3 value=1 so jump at LABEL=2000.
Explore Courses for Computer Science Engineering (CSE) exam

Top Courses for Computer Science Engineering (CSE)

Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer?
Question Description
Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer?.
Solutions for Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE). Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free.
Here you can find the meaning of Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Consider a new instruction named branch-on-bit-set (mnemonic bbs). The instruction “bbs reg, pos, label” jumps to label if bit in position pos of register operand reg is one. A register is 32 bits wide and the bits are numbered 0 to 31, bit in position 0 being the least significant. Consider the following emulation of this instruction on a processor that does not have bbs implemented.Branch to label if temp is non-zero. The variable temp is a temporary register. For correct emulation, the variable mask must be generated bya)b)c)d)Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
Explore Courses for Computer Science Engineering (CSE) exam

Top Courses for Computer Science Engineering (CSE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev