Adding two 64 bit numbers in Assembly

by

Add $t2 $t3 + $t4 $t5, result in $t0 $t1

addu  $t1, $t3, $t5    # add least significant word
sltu  $t0, $t1, $t5    # set carry-in bit 
addu  $t0, $t0, $t2    # add in first most significant word
addu  $t0, $t0, $t4    # add in second most significant word

For the second part of your question, there is no status register. None at all. Nada.

More Related Contents:

  1. How to Calculate Jump Target Address and Branch Target Address?
  2. How does MIPS I handle branching on the previous ALU instruction without stalling?
  3. Set all bits in CPU register to 1 efficiently
  4. Why is my MIPS base converter printing out the values from a previous loop after the current values?
  5. MARS MIPS simulator’s built-in assembler aligns more than requested?
  6. Why can’t MIPS use two registers in an addressing mode?
  7. Tweak mips-gcc output to work with MARS
  8. How to do less than or equal in Assembly Language(MIPS)?
  9. MIPS Assembly Alignment Align n
  10. NASM Assembly convert input to integer?
  11. Confusing brackets in MASM32
  12. What does multicore assembly language look like?
  13. How to represent hex value such as FFFFFFBB in x86 assembly programming?
  14. How to run a program without an operating system?
  15. Why is imul used for multiplying unsigned numbers?
  16. What does “DS:[40207A]” mean in assembly?
  17. How does the stack work in assembly language?
  18. Why does leave do “mov esp,ebp” in x86 assembly?
  19. Using ymm registers as a “memory-like” storage location
  20. Getting an label address to a register on ARM?
  21. When should I use size directives in x86?
  22. Understanding %rip register in intel assembly
  23. How do I write a bin file (512 bytes) to the first sector (sector 0) of a floppy disk?
  24. How to code a far absolute JMP/CALL instruction in MASM?
  25. How to tell the length of an x86 instruction?
  26. What does the “rep stos” x86 assembly instruction sequence do?
  27. What is the compatible subset of Intel’s and AMD’s x86-64 implementations?
  28. What’s the real meaning of $$ in nasm
  29. What is a microcoded instruction?
  30. How to enable Assembly Language support in Visual Studio 2013

Leave a Comment