Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
![Use the following data declarations:
```
.data
byteVal sbyte 1, 2, 3, FCh
wordVal word 1000h, 2000h, 3000h, 4000h
dwordVal dword 34567890h, 90785634h, 0Ah, 33445566h
```
Show the value of the **final destination operand** after each of the following code fragments has executed: *(If any instruction is invalid, indicate "INV" as the answer and briefly explain why)*
a.
```assembly
mov bh, byteVal+2
```
**Answer: bh =**
b.
```assembly
mov edx, 1
add dx, [wordVal+4]
```
**Answer: edx =**
c.
```assembly
mov ecx, 5
xchg ecx, [dwordVal+12]
```
**Answer: ecx =**
d.
```assembly
mov ah, byteVal+3
sub ah, [byteVal+0]
sub ah, [byteVal+2]
```
**Answer: ah =**
e.
```assembly
mov eax, dword ptr dwordVal+7
```
**Answer: eax =**
f.
```assembly
movsx cx, byteVal+3
```
**Answer (show your answer in binary): cx =**](https://content.bartleby.com/qna-images/question/ff1b6656-acf4-4e95-902d-43b1d88f0837/ccae2915-39d3-4818-9bac-a52c0cd26156/1vh4zao_processed.jpeg)
Transcribed Image Text:Use the following data declarations:
```
.data
byteVal sbyte 1, 2, 3, FCh
wordVal word 1000h, 2000h, 3000h, 4000h
dwordVal dword 34567890h, 90785634h, 0Ah, 33445566h
```
Show the value of the **final destination operand** after each of the following code fragments has executed: *(If any instruction is invalid, indicate "INV" as the answer and briefly explain why)*
a.
```assembly
mov bh, byteVal+2
```
**Answer: bh =**
b.
```assembly
mov edx, 1
add dx, [wordVal+4]
```
**Answer: edx =**
c.
```assembly
mov ecx, 5
xchg ecx, [dwordVal+12]
```
**Answer: ecx =**
d.
```assembly
mov ah, byteVal+3
sub ah, [byteVal+0]
sub ah, [byteVal+2]
```
**Answer: ah =**
e.
```assembly
mov eax, dword ptr dwordVal+7
```
**Answer: eax =**
f.
```assembly
movsx cx, byteVal+3
```
**Answer (show your answer in binary): cx =**
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