SPO 600

 I initially set up and built the current version of GCC on the aarch64-3 server that is provided. I started the build and it took at least an hour to fully compile. I limited the enabled languages to strictly C and C++ as I am most comfortable in these languages and to reduce the complexity of the project. The two files that control compilation passes are passes.cc, and tree-pass.h /* Description of GIMPLE pass.  */ class gimple_opt_pass : public opt_pass { protected:   gimple_opt_pass (const pass_data& data, gcc::context *ctxt)     : opt_pass (data, ctxt)   {   } }; /* Description of RTL pass.  */ class rtl_opt_pass : public opt_pass { protected:   rtl_opt_pass (const pass_data& data, gcc::context *ctxt)     : opt_pass (data, ctxt)   {   } } I did some reading and research on gimple passes and learned that they help optimize code and makes transformation at a high level before going to lower representations.

 The way to increment the program to output up to 30 was actually much more complex than I initially thought as ascii conversion method that we used by adding 48 to the numbers after the value of 9 stops working as it will output a different value. My solution to this was to split up two digit values into tens and ones and convert each of them individually. 

This lab was very difficult for me, as the progress of this class feels very fast and if I'm not up to date I feel pretty left behind in the material and I wasn't of much help during this in class portion. My group mates completed a good portion of the code during the lab without much input from me. I took some time to review and study the material for the aarch 64 and x86 64 assemblers and when I took on this lab again I felt much more prepared and ready to do it. Below is my completed portion of the in class section of the assignment.  .text .globl _start min = 0                          /* starting value for the loop index; **note that this is a symbol (constant)**, not a variable */ max = 10                         /* loop exits when the index hits this number (loop condition is i<max) */ _start:     mov     x19, min loop:...

 In this blog post I will write and actually implement the subtracting portion of my previous blog post about lab 3. Below is the code for the subtraction and addition calculator in the 6502 emulator. ; Adding calculator with addition and subtraction capabilities ; ROM routine entry points define          SCINIT          $ff81 ; initialize/clear screen define          CHRIN           $ffcf ; input character from keyboard define          CHROUT          $ffd2 ; output character to screen define          SCREEN          $ffed ; get screen size define          PLOT            $fff0 ; get/set cursor coordinates ; zeropage variables define          PRINT_PTR       $10 define   ...