Arseny Kapoulkine zeux

The following assumes that HLSL source is used as an input for shader compilation, glslang is used to compile it to SPIRV, and then SPIRV-Cross is optionally used to compile the result to MSL/GLSL.

First, make sure you use min16floatN type instead of halfN type. This is necessary because glslang treats halfN type (with default compilation options) as floatN because unfortunately that's what DX10 does as well.

#define half min16float
#define half2 min16float2
#define half3 min16float3

This is a full self-contained example for https://zeuxcg.org/2019/01/17/is-c-fast/#comment-4293281549

These files are variants of simplifier.cpp from https://github.com/zeux/meshoptimizer, created for the article https://zeuxcg.org/2019/01/17/is-c-fast/

	# table type guard (memory safety)
	cmp dword ptr [rdi + 12], 6
	jne 1072 <.text+0x5ea>
	# load array index and convert to integer (+ exactness check)
	movsd xmm0, qword ptr [rdi + 256]
	cvttsd2si eax, xmm0
	cvtsi2sd xmm1, eax
	ucomisd xmm1, xmm0
	jne 1046 <.text+0x5ea>
	# indices are 1-based; could remove this one with runtime changes

	unsigned int follow(std::vector<unsigned int>& ids, unsigned int v)
	{
	unsigned int nv = v;
	while (ids[nv] != nv)
	nv = ids[nv];

	return ids[v] = nv;
	}

	size_t islandize(const std::vector<unsigned int>& indices, std::vector<unsigned int>& islands)

	void decomposeMatrix(const float* matrix, float translation[3], float rotation[4], float scale[3])
	{
	translation[0] = matrix[12];
	translation[1] = matrix[13];
	translation[2] = matrix[14];

	// 0 1 2
	// 4 5 6
	// 8 9 10
	float det =

	uint32_t murmur2(uint32_t h)
	{
	h ^= h >> 13;
	h *= 0x5bd1e995;
	h ^= h >> 15;

	return h;
	}

	uint32_t murmur3(uint32_t h)

	// This file is part of meshoptimizer library; see meshoptimizer.h for version/license details
	#include "meshoptimizer.h"

	#include <assert.h>
	#include <float.h>
	#include <math.h>
	#include <string.h>

	#ifndef TRACE
	#define TRACE 0

	{
	"version": "0.2.0",
	"configurations": [
	{
	"name": "(gdb) Launch",
	"type": "cppdbg",
	"request": "launch",
	"program": "/mnt/c/work/meshoptimizer/build/debug/meshoptimizer",
	"args": ["-d", "data/kitten.obj"],
	"stopAtEntry": false,