Robert Saramet robert-saramet

Comprehensive Guide to 32-Bit RISC-V Assembly Programming (RV32I)

This guide provides a thorough introduction to programming in 32-bit RISC-V assembly language, focusing on the RV32I base integer instruction set. It starts with content from this cheat sheet and expands it into a complete, structured reference. The guide is organized for easy navigation, with clear sections, tables for listings, explanations, examples, and notes. It draws from official specifications and tutorials to ensure accuracy and completeness. Beginners can follow sequentially, while experienced users can reference specific sections.

Key assumptions:

We use the GNU Assembler (GAS) syntax, common for RISC-V tools.
Examples assume a bare-metal or simple simulator environment (e.g., RARS, Spike, or QEMU).
RV32I is the base; extensions like M (multiply/divide) are noted but not required unless specified.
Code snippets are testable in simulators; error handling and overflows are ign

How to convert markdown to PDF:

This post reviews several methods for converting a Markdown (.md) formatted file to PDF, from UNIX or Linux machines.

Using `Pandoc`:

$ pandoc How_I_got_svg-resizer_working_on_Mac_OSX.md -s -o test1.pdf

	#include <math.h>
	#include <stdbool.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	void nth_suffix(unsigned int n, char suffix[]) {
	if (n > 10 && n < 20) {
	strcpy(suffix, "th");
	return;

	#include <math.h>

	int digits(int n) {
	if(n < 10) return 1;
	if(n < 100) return 2;
	if(n < 1000) return 3;
	return 3 + digits(n / 1000);
	}

	bool is_armstrong_number(int candidate) {

	#include <string.h>
	#include <ctype.h>

	bool is_isogram(const char word[]) {
	if(word == NULL)
	return false;
	int count['z' - 'a' + 1] = {0};
	for(size_t i = 0; i < strlen(word); i++) {
	char c = tolower(word[i]);
	if(c >= 'a' && c <= 'z')

	#include <stdio.h>

	#define FREEZING_POINT_K 273.15f
	#define FREEZING_POINT_F 32.0f
	#define F_TO_K_RATIO (5.0f / 9.0f)

	#define DEGREE_SYMBOL 248

	enum Unit { Kelvin, Celsius, Fahrenheit };

	#include <stdio.h>
	#include <string.h>

	#define INTERNATIONAL_TRESHOLD 166
	#define LOCAL_TRESHOLD 194

	int calc_volume(int length, int width, int height) {
	return length * width * height;
	}

	// Idiomatic
	// Modifies string_var in place; doesn't return anything
	// The original string_var remains valid
	fn takes_string_ref_no_return(string_var: &mut String) {
	string_var.push_str("world");
	}

	// Idiomatic
	// Returns a new owned String
	// The original str_var also remains valid

	function batdir --description 'Print all files in directory using bat'
	if not count $argv > /dev/null
	set path .
	else
	set path (string trim -r -c / $argv)
	end
	for file in $path/*
	bat -P $file 2> /dev/null
	end
	end

	package main

	import (
	"bufio"
	"errors"
	"github.com/gen2brain/raylib-go/raylib"
	"github.com/tarm/serial"
	"log"
	"os"
	"strconv"

Robert Saramet robert-saramet

Comprehensive Guide to 32-Bit RISC-V Assembly Programming (RV32I)

How to convert markdown to PDF:

Using Pandoc:

Using `Pandoc`: