lydonchandra’s gists

lydonchandra / iframe

Created May 21, 2013 01:28

	Parent-window.html

	this.$el.append('<iframe id="iframeDocument" src="/Iframe.html"></iframe>');

	loadIframe = function() {
	var $iframeDocument = $('#iframeDocument').get(0).contentWindow.document;
	$('#iframeContent', $iframeDocument).append( myHtml );
	}

lydonchandra / gist:5675402

Created May 30, 2013 02:28

Mocking/Spoofing Browser Geolocation W3C API Call GpsMock.mock() to mock/spoof

	var GpsMock = {
	mockSetIntervalId : null,
	mock : function( x, y ) {
	var setIntervalId;
	if( navigator.geolocation ) {
	var self = this;
	if( !x ) {
	//start x y not set, try to get 'REAL' current location and use it
	navigator.geolocation.getCurrentPosition(
	function success(position) { self.mock(position.coords.longitude, position.coords.latitude) },

lydonchandra / gist:7981296

Created December 16, 2013 01:56

send XML string as POST body into WCF endpoint

	[OperationContract]
	[WebInvoke(Method = "GET", BodyStyle = WebMessageBodyStyle.WrappedRequest, ResponseFormat = WebMessageFormat.Json,
	UriTemplate = "/proxy/?url={url}")]
	String proxy_GET(string url);

	[OperationContract]
	[WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.Bare,
	RequestFormat = WebMessageFormat.Xml, ResponseFormat = WebMessageFormat.Xml,
	UriTemplate = "/proxy/?url={url}")]
	XElement proxy_POST(string url, XElement postData);

lydonchandra / ymm vectorization

Last active January 1, 2016 00:29

	//const __m128 half = _mm_set1_ps(0.5f);

	//set our packed floats to 1.5f
	__m256 half256ps = _mm256_set1_ps(1.5f);

	//make room for our 256bits result variable
	__m256i result256i;

	unsigned X, X0, X1, X2, X3, X4, X5, X6, X7;

lydonchandra / imul-or-leaq.cs

Last active January 1, 2016 01:49

Use LEA as a faster way to do multiplication

	//rax = 450 * rbx
	imulq $450, %rbx, %rax ## imm = 0x1C2

	//another way to do rax = 450 * rbx
	//cycle wise, this is on par with imul instruction above
	leaq (%rbx,%rbx,8), %rax //rax=9*rbx
	leaq (%rax,%rax,4), %rax //rax=rax5 == 45rbx
	leaq (%rax,%rax,4), %rax //rax=rax5 == 225rbx
	shlq $1,%rax //rax=rax2 == 450rbx

lydonchandra / parameter passing amd64bin gcc osx.cs

Last active January 1, 2016 05:59

parameter passing amd64bin gcc osx

	__m128 __attribute__ ((noinline)) test_parameterPassing(
	__m128 m128param1, //%xmm0
	unsigned u1, //%edi
	float f1, float f2, //%xmm1, %xmm2
	unsigned u2, unsigned u3, //%esi, %edx
	double d1, double d2, //%xmm3, %xmm4
	unsigned u4, unsigned u5, //%ecx, %r8d
	double d3, double d4, double d5, double d6, //%xmm5, %xmm6, %xmm7, stack
	unsigned u6, unsigned u7, unsigned u8 //%r9d, stack, stack
	) {

lydonchandra / vpshufd-example.cs

Last active November 23, 2024 01:05

How to use pshufd instruction (pack shuffle) //0x00 set all elems to 1st elem, 0000 0000 //0x55 set all elems to 2nd elem, 0101 0101 //0xAA set all elems to 3rd elem, 1010 1010 //0xFF set all elems to 4th elem, 1111 1111 //0x1B reverse order, 0001 1011

	printf("m128i.m128_u32[0] = %04X _ before\n", m128i.m128_u32[0]);
	printf("m128i.m128_u32[1] = %04X _ before\n", m128i.m128_u32[1]);
	printf("m128i.m128_u32[2] = %04X _ before\n", m128i.m128_u32[2]);
	printf("m128i.m128_u32[3] = %04X _ before\n", m128i.m128_u32[3]);

	__asm {
	pxor xmm5, xmm5
	//vpshufd xmm5, m128i, 0xAA
	vpshufd xmm5, m128i, 0x55
	//0x00 set all elems to 1st elem, 0000 0000

lydonchandra / parameter passing pointer and __m256.cpp

Last active January 1, 2016 08:29

parameter passing pointer and __m256

	void test_parameterPassing_pointer( double *d1p,
	__m256 m256_1p, __m128 m128_1p,
	__m256 m256_1) {

	double mul1 = (d1p) + (d1p);

	double m256_dp = ((double)m256_1p);
	double m128_dp = ((double)m128_1p);

	double mul2 = m256_dp[0] * mul1 - m128_dp[1];

lydonchandra / test_vinsertps.cpp

Last active January 1, 2016 08:58

test_vinsertps.cpp

	void test_vinsertps() {

	__m128i m128_1;
	unsigned long long allOneLL = 0x2222222211111111LL;
	unsigned long long allTwoLL = 0x4444444433333333LL;


	((unsigned long long*)&m128_1)[0] = allOneLL;
	((unsigned long long*)&m128_1)[1] = allTwoLL;

lydonchandra / test_unpckldq.cpp

Last active January 1, 2016 13:09

test_unpckldq and unpcklqdq

	void test_punpckldq() {
	__m128i m128_1;

	__asm {
	mov r8d, 0x11112222
	mov r9d, 0x33334444
	mov r10d,0x55556666
	mov r11d,0x77778888

	movd xmm8, r8d

	void test_parameterPassing_pointer( double *d1p,
	__m256 m256_1p, __m128 m128_1p,
	__m256 m256_1) {

	double mul1 = (d1p) + (d1p);

	double m256_dp = ((double)m256_1p);
	double m128_dp = ((double)m128_1p);

	double mul2 = m256_dp[0] * mul1 - m128_dp[1];

Lydon Chandra lydonchandra