elricmann

// Copyright (c) 2025 Elric Neumann. All rights reserved. MIT license.
// Compile with: g++ -std=c++23 -O3 -march=native -lstdc++exp -o vector_dot_product vector_dot_product.cc
// Width is 4 elements for SSE 4.2 (128-bit registers).
//
// Expected output:
//
// simd width: 4 elements
// simd dot product result: 1.65952e+20
// scalar dot product result: 1.70002e+20
// simd time: 8 ms

elricmann

#include <chrono>
#include <iostream>
#include <vector>

struct aligned_struct {
  double a;
  int b;
  char c;
};

elricmann

// Copyright (c) 2024 Elric Neumann. All rights reserved. MIT license.
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>

#define MAX_NODES 1000
#define MAX_COLORS 32
#define MAX_NEIGHBORS 100

elricmann

// Copyright (c) 2024 Elric Neumann. All rights reserved. MIT license.
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>

struct compressed_ptr {
  int32_t offset;
  uintptr_t base;
};

elricmann

// Copyright (c) 2024 Elric Neumann. All rights reserved. MIT license.
// Compile and run with: clang -O3 -o main lanczos_resample.c -lm && ./main
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

elricmann

// Copyright (c) 2024 Elric Neumann. All rights reserved. MIT license.
#![allow(unused)]
use std::rc::Rc;
use std::cell::{Cell, RefCell};
use std::collections::{HashMap, HashSet};

pub trait GcObject {
    fn trace(&self, tracer: &TracingGC);
}

elricmann

Every ABI convention requires register usage that is in line with said convention, the C compiler you're using may force ad-hoc register allocation so it's important to suffix with __volatile__ when intending to escape user space.

arch	instr	syscall no reg	arg reg	sysret reg	clobbered regs
x86-64 (Linux)	syscall	rax	rdi, rsi, rdx, r10, r8, r9	rax	rax, rcx, r11
x86 (Linux)	int 0x80	eax	ebx, ecx, edx, esi, edi, ebp	eax	eax, ebx, ecx, edx
ARM aarch32	svc 0	r7	r0, r1, r2, r3, r4, r5, r6	r0	r0-r3, r7
ARM aarch64	`s

elricmann

// Copyright (c) 2024 Elric Neumann. All rights reserved. MIT license.
// Title: non-recursive De Casteljau's algorithm & cubic Bézier spline

#ifdef GL_ES
precision mediump float;
#endif

uniform float u_time;
uniform vec2 u_resolution;

elricmann

// Copyright (c) 2024 Elric Neumann. All rights reserved. MIT license.
// Title: random noise layers with fractal brownian motion & amplitude pertubation

#ifdef GL_ES
precision mediump float;
#endif

uniform float u_time;
uniform vec2 u_resolution;

elricmann

// Copyright (c) 2024 Elric Neumann. All rights reserved. MIT license.
// Title: multi-source ripple with fresnel effect and point reflection

#ifdef GL_ES
precision mediump float;
#endif

uniform float u_time;
uniform vec2 u_resolution;