问题
Say I take an integer assigned to $a0, how do I go about and print the integer in its Hexadecimal form?
回答1:
Use syscall 34. MARS syscalls
If you are using a simulator which does not have that syscall, or you want to see only the necessary bytes, you will need to do it manually. The easiest approach would be iterative. Get a string of 10 bytes (8 hex values and leading 0x).
1) Bitwise and $a0 with constant 15.
2) Convert result to equivalent hex value in ASCII. A lookup table would be clean and efficient.
3) Store equivalent hex value in space for string. Keep in mind little endian issues.
4) Logical right shift $a0 by 4.
5) Goto 1.
Do that until $a0 is 0 and you should have the hex value in a string, which you can then print.
来源：https://stackoverflow.com/questions/4363411/convert-integer-to-its-hexidecimal-value-to-print