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  Automatic Function Multi-Versioning for GCC Introduction: For this project, I will be working with the GCC compiler and learning how it works by building it from scratch on an AArch64 platform (which is 64-Bit). Setting up GCC like this lets me dig into how it compiles code and optimizes functions for different CPUs, especially as the goal is to experiment with Automatic Function Multi-Versioning (AFMV). Guide to Building GCC for AArch64 Step 1: Cloning the Source Code To get started, I needed the GCC source code. Cloning from the official GCC repository keeps things organized and up to date. Here’s the command to clone it: git clone git://gcc.gnu.org/git/gcc.git ~/gcc This creates a directory called ~/gcc , where all the source files are stored. The cloning process might take a few minutes, depending on your internet speed. Step 2: Setting Up a Build Directory It’s recommended to create a separate directory for building GCC instead of doing it directly in the source directory. ...
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Project Stage 3 : Part 2

 This part is to cover up for the things that i may have missed in the previous stages. So i extracted both the tar zip files (spo600-gcc-pass-demo and spo600-gcc-pass-demo-2) which extracted 4 files each: The tar file had everything I needed to modify GCC. My professor provided details about which files to change, and I updated four of them: passes.def: Added NEXT_PASS (pass_ctyler); tree-ctyler.cc: Contained the actual pass code. tree-pass.h: Added extern gimple_opt_pass *make_pass_ctyler (gcc::context *ctxt); Makefile.in: Added tree-ctyler.o to the OBJS definition. Both zip files have same files and same code except the execute function in tree-ctyler.cc as shown below; spo600-gcc-pass-demo: unsigned int pass_ctyler :: execute ( function * fun )   {     basic_block bb ;     int bb_cnt = 0 , stmt_cnt = 0 ;     FOR_EACH_BB_FN ( bb , fun )       {         bb_cnt ++ ;         if ( du...
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Lab 2

  6502 Math Lab Introduction This lab involved creating a diagonal-moving graphic in the 6502 emulator, ensuring the object bounces when it reaches the edges of the screen. The provided code initializes a graphic on a bitmapped display and uses subroutines to animate it. The program also detects when the object reaches the screen's boundaries and reverses its direction accordingly. Here's a breakdown: ; ; draw-image-subroutine.6502 ; ; This is a routine that can place an arbitrary ; rectangular image on to the screen at given ; coordinates. ; ; Chris Tyler 2024-09-17 ; Licensed under GPLv2+ ; ; ; The subroutine is below starting at the ; label "DRAW:" ; ; Test code for our subroutine ; Moves an image diagonally across the screen ; Zero-page variables define XPOS $20 define YPOS $21 ; Set up the data structure ; The syntax #<LABEL returns the low byte of LABEL ; The syntax #>LABEL returns the high byte of LABEL LDA #<G_X ; POINTER TO GRAPHIC STA $10...
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