How many minutes old?

Read an age in whole years with scanf and print how many minutes that is, counting every year as 365 days. For the input 19:

19 years is 9986400 minutes

The starter has both format strings and a 4-byte slot in .bss, years_in. Call scanf with fmt_in in x0argument and return register (x0-x7): carries the first eight arguments and the return value. and the address of years_in in x1argument and return register (x0-x7): carries the first eight arguments and the return value., then load the age into years_r.

A year has 525600 minutes, so at 4086 years the answer no longer fits in 32 bits (the largest 32-bit int is 2147483647). Widen the age first: sxtwSign-extend a word to 64-bit Xd. copies a 32-bit w value into a 64-bit x register and keeps its sign, and mulRd = Rn * Rm. Low bits only. on x registers then gives the full 64-bit product. %ld prints a 64-bit x register. 525600 is too wide for one movCopy register or wide immediate into Rd., so build it with mulRd = Rn * Rm. Low bits only. from 1440 (minutes in a day) and 365.

What is checked

• with input 19 the line above is printed
• the program exits cleanly
• sxtwSign-extend a word to 64-bit Xd. widens the age
• the program also runs on ages you do not see: zero, a negative number, and ages whose minutes do not fit in 32 bits