Which of the following instructions subtracts the value in x5 from the value in x6 and saves the result in x20? sub x20, x6, x5 sub x6, x20, x5 sub x6, x5, x20 sub x20, x5, x6
Added by Phillip A.
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The question asks to identify the correct assembly instruction that performs the operation: `x20 = x6 - x5`. This is a subtraction operation where the value in register `x5` is subtracted from the value in register `x6`, and the result is stored in register `x20`. Show more…
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The address register, A0 and data register, D2 are assumed to have the initial condition as follows: A0 = $00000106 D2 = $AAAA0000. By using Table Q2(a) below, all instructions will be using the same initial data as stated above. Table Q2(a): $000100 $11 $22 $000101 $000102 $33 $33 $000103 $000104 $55 $66 $000105 $000106 $7A $88 $000107 $000108 $99 $AB $000109 $00010A $BB $CC $00010B $00010C $DD $EE $00010D $00010E $FF $00 $00010F. DETERMINE the content of D2 and A2 after the following instructions are executed: i) MOVEA.W $0109 , A2 ii) SUBQ.B #%101, D2 iii) MOVE.W (A0), D2 iv) ADD.L - (A0) , D2 v) MOVE.L (A0) + , D2 vi) CLR.L D2
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Problems 2.10: Assume the registers x5 and x6 hold the values 0x8000000000000000 and 0xD000000000000000, respectively. 2.10.1: What is the value of x30 for the following assembly code? add x30, x5, x6 2.10.2: Is the result in x30 the desired result, or has there been overflow? 2.10.3: For the contents of x5 and x6 as specified above, what is the value of x30 for the following assembly code? sub x30, x5, x6 2.10.4: Is the result in x30 the desired result, or has there been overflow? 2.10.5: For the contents of registers x5 and x6 as specified above what is the value of x30 for the following assembly code? add x30, x5, x6 add x30, x30, x5
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