ircmaxell

<?php

declare(strict_types=1);

require __DIR__ . '/vendor/autoload.php';
$context = new PHPCompiler\Bootstrap\Context;
$parser = new PHPCompiler\Bootstrap\Parser($context);

$parser->parse(file_get_contents(__DIR__ . "/example.php"), __FILE__);

ircmaxell

   Hex   Dec   Binary
A = A0   160   10100000
B = 4C   76    01001100

0 - A
    FFFFFF60   -160   1111111101100000 (lowest 16 bits)
0 - A - B
    FFFFFF20   -236   1111111100010100 (lowest 16 bits)
    
Lowest 8 bits of 0-A-B: 00010100

ircmaxell

ACTUAL[0000] CASE[10100001 10000010 01001101 11111111 10010001] XOR[0000] ~XOR[1111] SUM[0000] REVSUM[101110] -REVSUM[0010]
ACTUAL[0000] CASE[10100001 10000010 01001101 11111111 10000001] XOR[0000] ~XOR[1111] SUM[0000] REVSUM[101110] -REVSUM[0010]
ACTUAL[0000] CASE[10100001 11000010 01001100 11111111 11111111] XOR[1111] ~XOR[0000] SUM[1101] REVSUM[101101] -REVSUM[0011]
ACTUAL[0000] CASE[10100001 10000010 01001100 11111111 11111111] XOR[1111] ~XOR[0000] SUM[1101] REVSUM[101101] -REVSUM[0011]
ACTUAL[0000] CASE[10100001 10100011 01001101 11111111 11111111] XOR[1111] ~XOR[0000] SUM[1111] REVSUM[111101] -REVSUM[0011]
ACTUAL[0000] CASE[10100001 10010011 01001101 11111111 11111111] XOR[1111] ~XOR[0000] SUM[1111] REVSUM[111101] -REVSUM[0011]

ACTUAL[0001] CASE[10100001 10100011 01001100 11111111 11111111] XOR[1110] ~XOR[0001] SUM[1110] REVSUM[110101] -REVSUM[1011]
ACTUAL[0001] CASE[10100001 11000010 01001101 11111111 11111111] XOR[1110] ~XOR[0001] SUM[1110] REVSUM[110101] -REVSUM[1011]
ACTUAL[0001] CASE[10100001 1000

ircmaxell

Toggle Swing: 10100010 00000001
Toggle LED:   10100010 00001000


Set Temp + Mode
Byte 1: 10100001
Byte 2: 
|--------|--------|--------|--------|--------|--------|--------|--------|
| POWER  | SLEEP  | Fan 0  | Fan 1  | FAN 2  | MODE 0 | MODE 1 | MODE 2 |

ircmaxell

<?php

interface Lock {
    public function advisory(string $identifier): LockContext;
    public function exclusive(string $identifier): LockContext;
    public function waitForAdvisory(string $identifier, int $timeout = 0): \Generator;
    public function waitForExclusive(string $identifier, int $timeout = 0): \Generator;
}

interface LockContext {

ircmaxell

#include "pins_arduino.h"
#include "SPI_USART.h"

uint8_t SPIUsartClass::ss[SPIUSART_COUNT];

void SPIUsartClass::begin(uint8_t _usart, uint8_t _ss) {
  if (_usart > SPIUSART_COUNT) {
    return;
  }
  ss[_usart] = _ss;

ircmaxell

.offset 0xC000

boot:
    MOV RJ1, 0x00;
    MOV RJ2, 0x00;
    MOV RA, 0xD0;
    STORE RA;
    MOV RJ2, 0x01;
    MOV RA, 0x00;
    STORE RA;

ircmaxell

Life of an If Statement

The humble if statement: so simple, so short, so trivial. But do you know how it works? I mean, how it really works? Join us on a trip down the rabbit hole to find out! Our journey will take us from PHP to C, from Assembly to Machine code, from CPU to Transistor and beyond. We'll discover all sorts of interesting things you many never have known about programming, physics and even the universe itself... I can't promise that you'll return from the depths of the CPU, but if you do, you will not be the same.

ircmaxell

<?php

function doStuff() {
  //blah
  //blah
  if (!$this->isWhateverCondition(blah, blah, blah)) {
      return false;
  }
}

ircmaxell

<?php

$a = 1;

if ($a > 1) {
	$b = 2;
} else {
	$b = 3;
}