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# RISC - V Assembly Code for Diamond Pattern . data prompt: . asciiz Enter a positive odd integer ( N ) : newline:
# RISCV Assembly Code for Diamond Pattern
data
prompt: asciiz "Enter a positive odd integer N:
newline: asciiz
text
main:
# Prompt user for input
li a # file descriptor stdout
li a prompt # pointer to the string
li a # string length
li a # system call code for write
ecall
# Read user input
li a # file descriptor stdin
li a # buffer size
li a # system call code for read
ecall
# Convert string to integer youll need a conversion subroutine
# This part is missing and requires a separate subroutine
# Check if N is odd, adjust if necessary
# You need to check the least significant bit to ensure it's odd
# Initialize loop counters
li t # Loop counter for rows
drawdiamond:
# Draw the upper part of the diamond
beqz t drawlowerdiamond # Exit loop if upper part is done
# Calculate number of asterisks for the current row
li t # Number of asterisks for the first row
mul t t t # Multiply by the current row number
sub t t # Subtract to get odd numbers
# Print asterisks for the current row
li a # file descriptor stdout
li a # character to print
li a # string length
li a # system call code for write
# Loop to print asterisks
la t newline # Load newline character address
printasterisks:
ecall # Print asterisk
add t t # Decrement asterisk count
bnez t printasterisks # Loop until all asterisks are printed
# Move to the next row
la t newline # Load newline character address
ecall # Print newline
add t t # Increment row counter
j drawdiamond # Jump back to drawdiamond loop
drawlowerdiamond:
# Draw the lower part of the diamond
# This part is similar to the upper part with a reversed loop
# Exit the program
li a # system call code for exit
li a # exit status
ecall
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