26. Extract and Modify Field in a 32-bit Register

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Code

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

uint32_t update_register(uint32_t reg) {
    // Your logic here
    uint32_t temp_reg = reg;
    uint32_t result = 0;

    temp_reg = (reg >> 10) & (0x1F);
    if(temp_reg < 31){
        temp_reg += 1;
    }
    else{
        return reg;
    }

    uint32_t mask = ((1U << 5) - 1);
    uint32_t clear_mask = ~(mask << 10);
    reg &= clear_mask;

    result = reg | (temp_reg << 10);
    return result;
}

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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