Merge other basic circuits here

src/evmasm.js

@@ -0,0 +1,189 @@
+// Copyright (c) 2018 Jordi Baylina
+// License: LGPL-3.0+
+//
+
+
+const Web3 = require("web3");
+const assert = require("assert");
+
+class Contract {
+    constructor() {
+        this.code = [];
+        this.labels = {};
+        this.pendingLabels = {};
+    }
+
+    createTxData() {
+        let C;
+
+        // Check all labels are defined
+        const pendingLabels = Object.keys(this.pendingLabels);
+        if (pendingLabels.length>0) {
+            throw new Error("Lables not defined: "+ pendingLabels.join(", "));
+        }
+
+        let setLoaderLength = 0;
+        let genLoadedLength = -1;
+
+        while  (genLoadedLength!=setLoaderLength) {
+            setLoaderLength = genLoadedLength;
+            C = new module.exports();
+            C.codesize();
+            C.push(setLoaderLength);
+            C.push(0);
+            C.codecopy();
+
+            C.push(this.code.length);
+            C.push(0);
+            C.return();
+            genLoadedLength = C.code.length;
+        }
+
+        return Web3.utils.bytesToHex(C.code.concat(this.code));
+    }
+
+    stop() { this.code.push(0x00); }
+    add()  { this.code.push(0x01); }
+    mul()  { this.code.push(0x02); }
+    sub()  { this.code.push(0x03); }
+    div()  { this.code.push(0x04); }
+    sdiv() { this.code.push(0x05); }
+    mod()  { this.code.push(0x06); }
+    smod()  { this.code.push(0x07); }
+    addmod()  { this.code.push(0x08); }
+    mulmod()  { this.code.push(0x09); }
+    exp()  { this.code.push(0x0a); }
+    signextend()  { this.code.push(0x0b); }
+
+    lt()   { this.code.push(0x10); }
+    gt()   { this.code.push(0x11); }
+    slt()  { this.code.push(0x12); }
+    sgt()  { this.code.push(0x13); }
+    eq()   { this.code.push(0x14); }
+    iszero()  { this.code.push(0x15); }
+    and()  { this.code.push(0x16); }
+    or()  { this.code.push(0x17); }
+    shor()  { this.code.push(0x18); }
+    not()  { this.code.push(0x19); }
+    byte()  { this.code.push(0x1a); }
+
+    keccak() { this.code.push(0x20); }
+    sha3() { this.code.push(0x20); }   // alias
+
+    address()  { this.code.push(0x30); }
+    balance()  { this.code.push(0x31); }
+    origin()  { this.code.push(0x32); }
+    caller()  { this.code.push(0x33); }
+    callvalue()  { this.code.push(0x34); }
+    calldataload()  { this.code.push(0x35); }
+    calldatasize()  { this.code.push(0x36); }
+    calldatacopy()  { this.code.push(0x37); }
+    codesize()  { this.code.push(0x38); }
+    codecopy()  { this.code.push(0x39); }
+    gasprice()  { this.code.push(0x3a); }
+    extcodesize()  { this.code.push(0x3b); }
+    extcodecopy()  { this.code.push(0x3c); }
+    returndatasize()  { this.code.push(0x3d); }
+    returndatacopy()  { this.code.push(0x3e); }
+
+    blockhash()  { this.code.push(0x40); }
+    coinbase()  { this.code.push(0x41); }
+    timestamp()  { this.code.push(0x42); }
+    number()  { this.code.push(0x43); }
+    difficulty()  { this.code.push(0x44); }
+    gaslimit()  { this.code.push(0x45); }
+
+    pop()  { this.code.push(0x50); }
+    mload()  { this.code.push(0x51); }
+    mstore()  { this.code.push(0x52); }
+    mstore8()  { this.code.push(0x53); }
+    sload()  { this.code.push(0x54); }
+    sstore()  { this.code.push(0x55); }
+
+    _pushLabel(label) {
+        if (typeof this.labels[label] != "undefined") {
+            this.push(this.labels[label]);
+        } else {
+            this.pendingLabels[label] = this.pendingLabels[label] || [];
+            this.pendingLabels[label].push(this.code.length);
+            this.push("0x000000");
+        }
+    }
+
+    _fillLabel(label) {
+        if (!this.pendingLabels[label]) return;
+
+        let dst = this.labels[label];
+
+        const dst3 = [dst >> 16, (dst >> 8) & 0xFF, dst & 0xFF];
+
+        this.pendingLabels[label].forEach((p) => {
+            for (let i=0; i<3; i++) {
+                this.code[p+i+1] = dst3[i];
+            }
+        });
+
+        delete this.pendingLabels[label];
+    }
+
+
+    jmp(label)  {
+        this._pushLabel(label);
+        this.code.push(0x56);
+    }
+
+    jmpi(label)  {
+        this._pushLabel(label);
+        this.code.push(0x57);
+    }
+
+    pc()  { this.code.push(0x58); }
+    msize()  { this.code.push(0x59); }
+    gas()  { this.code.push(0x5a); }
+    label(name)  {
+        assert(typeof this.labels[name] == "undefined", "Label already defined");
+        this.labels[name] = this.code.length;
+        this.code.push(0x5b);
+
+        this._fillLabel(name);
+    }
+
+    push(data) {
+        const d = Web3.utils.hexToBytes(Web3.utils.toHex(data));
+        assert(d.length>0);
+        assert(d.length<=32);
+        this.code = this.code.concat([0x5F + d.length], d);
+    }
+
+    dup(n) {
+        assert(n>=0);
+        assert(n<16);
+        this.code.push(0x80 + n);
+    }
+
+    swap(n) {
+        assert(n>=1);
+        assert(n<=16);
+        this.code.push(0x8f + n);
+    }
+
+    log0()  { this.code.push(0xa0); }
+    log1()  { this.code.push(0xa1); }
+    log2()  { this.code.push(0xa2); }
+    log3()  { this.code.push(0xa3); }
+    log4()  { this.code.push(0xa4); }
+
+    create()  { this.code.push(0xf0); }
+    call()  { this.code.push(0xf1); }
+    callcode()  { this.code.push(0xf2); }
+    return()  { this.code.push(0xf3); }
+    delegatecall()  { this.code.push(0xf4); }
+
+    staticcall()  { this.code.push(0xfa); }
+    revert()  { this.code.push(0xfd); }
+    invalid()  { this.code.push(0xfe); }
+    selfdestruct()  { this.code.push(0xff); }
+}
+
+module.exports = Contract;
+