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| | danielmangum.com
A Single-Cycle 64-Bit RISC-V Register File · Daniel Mangum
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| | It's a simple question really: how can you read and write to the same register in a single-cycle processor? If you have spent most of your life working with software, it is tempting to think of all events as happening sequentially. However, that sequential model that we have become so familiar with as software engineers is really an abstraction that hardware offers to us to help our simple brains reason about logic.
| | gpfault.net
Let's Learn x86-64 Assembly! Part 3 - Arithmetic and Logic
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| | [AI summary] The text provides an in-depth exploration of various x86-64 instruction set architectures, focusing on arithmetic operations (ADD, SUB, MUL, SMUL, DIV, SDIV), logical operations (AND, OR, XOR, NOT), and control flow instructions. It details the implementation of these instructions in the QBX virtual machine, emphasizing how they emulate real x86-64 instructions while managing the flags register and handling different operand sizes (8-bit and 16-bit). The text also discusses the nuances of flag handling, register operations, and macro-based code generation to streamline instruction implementation.
| | www.righto.com
Reverse-engineering the surprisingly advanced ALU of the 8008 microprocessor
3.4 parsecs away

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| | A computer's arithmetic-logic unit (ALU) is the heart of the processor, performing arithmetic and logic operations on data. If you've studie...
| | mcyoung.xyz
Understanding Assembly Part I: RISC-V · mcyoung
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| [AI summary] The article provides an in-depth exploration of computer architecture and assembly language, focusing on the RISC-V Instruction Set Architecture (ISA). It covers fundamental concepts such as machine words, registers, and the role of assembly language as a human-readable representation of machine instructions. The text explains how programs are structured using instructions, labels, and directives, and categorizes instructions into arithmetic, memory, control flow, and miscellaneous types. It also delves into the calling convention, which defines how functions are called and how data is passed between them, and highlights the importance of maintaining the call stack illusion. The article further discusses the practical implications of these conce...