Extract and Modify Field in a 32-bit Register

Code

#include <stdio.h>
#include <stdint.h>

uint32_t update_register(uint32_t reg) {
    uint32_t value = 0;
    value = ((reg >> 10) & 0x0000001F);
    if(value < 31) {value++;}

    reg &= ~(0x1FU << 10);
    reg |= (value << 10); 

    return reg;

}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    uint32_t updated = update_register(reg);
    printf("%u", updated);
    return 0;
}

Solving Approach

 

 

 

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Input

15360

Expected Output

16384