Machine organization What addressesin memory containarray A? Which line sets the flag to check for end of loop? Which register points to array A elements?

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Machine organization

What addressesin memory containarray A?

Which line sets the flag to check for end of loop?

Which register points to array A elements?

### Translating JAVA Code to LC3 Assembly Language

#### Example JAVA Code:
The following Java program is designed to initialize an array with 10 elements, setting each element to 0:

```java
for (i = 0; i < 10; i++) {
    A[i] = 0;
}
```

#### Equivalent LC3 Assembly Language Code:
Below is the corresponding LC3 assembly language code that performs the same operation:

```assembly
.ORIG x3000

; Initialize R0 and R5 to 0
AND  R0, R0, #0         ; R0 <- 0
AND  R5, R5, #0         ; R5 <- 0

; Load the base address of the array into R1
LD   R1, ADDRA

; Load constant -10 into R2 for loop comparison
LD   R2, MINUS10       ; R2 <- # -10

LOOP
; Add the contents of R0 and R2, store the result into R3
ADD  R3, R0, R2

; If the result in R3 is zero, exit the loop
BRz  DONE

; Add base address of array in R1 with R0, store in R4
ADD  R4, R1, R0

; Store zero into the array element A[i]
STR  R5, R4, #0

; Increment the index R0 by 1 (i++)
ADD  R0, R0, #1

; Repeat the loop
BR   LOOP

DONE
; Halt the program
HALT

; Memory addresses for base array address and constant
ADDRA   .FILL x4000
MINUS10 .FILL #-10

.END
```

#### Explanation of LC3 Code:

1. **.ORIG x3000**: Start the program at memory location x3000.
2. **AND R0, R0, #0**: Initialize register R0 to 0. This will be used as the loop index.
3. **AND R5, R5, #0**: Initialize register R5 to 0. This represents the value to store in the array elements.
4. **LD R1, ADDRA**: Load the base address of the array into register R1.
5. **LD R2, MINUS10**: Load the
Transcribed Image Text:### Translating JAVA Code to LC3 Assembly Language #### Example JAVA Code: The following Java program is designed to initialize an array with 10 elements, setting each element to 0: ```java for (i = 0; i < 10; i++) { A[i] = 0; } ``` #### Equivalent LC3 Assembly Language Code: Below is the corresponding LC3 assembly language code that performs the same operation: ```assembly .ORIG x3000 ; Initialize R0 and R5 to 0 AND R0, R0, #0 ; R0 <- 0 AND R5, R5, #0 ; R5 <- 0 ; Load the base address of the array into R1 LD R1, ADDRA ; Load constant -10 into R2 for loop comparison LD R2, MINUS10 ; R2 <- # -10 LOOP ; Add the contents of R0 and R2, store the result into R3 ADD R3, R0, R2 ; If the result in R3 is zero, exit the loop BRz DONE ; Add base address of array in R1 with R0, store in R4 ADD R4, R1, R0 ; Store zero into the array element A[i] STR R5, R4, #0 ; Increment the index R0 by 1 (i++) ADD R0, R0, #1 ; Repeat the loop BR LOOP DONE ; Halt the program HALT ; Memory addresses for base array address and constant ADDRA .FILL x4000 MINUS10 .FILL #-10 .END ``` #### Explanation of LC3 Code: 1. **.ORIG x3000**: Start the program at memory location x3000. 2. **AND R0, R0, #0**: Initialize register R0 to 0. This will be used as the loop index. 3. **AND R5, R5, #0**: Initialize register R5 to 0. This represents the value to store in the array elements. 4. **LD R1, ADDRA**: Load the base address of the array into register R1. 5. **LD R2, MINUS10**: Load the
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