All files / src/generator native.js

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// @flow
import mergeBlock from './merge-block';
import mapSyntax from './map-syntax';
import { textMap } from '../emitter/opcode';
import type { GeneratorType } from './flow/types';
 
const alignCodes = {
  load8_s: 0,
  load8_u: 0,
  store8: 0,
  load16_s: 1,
  load16_u: 1,
  store16: 1,
  store32: 2,
  load32_s: 2,
  load32_u: 2,
  store: 2,
  load: 2,
};
 
const immediates = {
  grow_memory: 0,
  current_memory: 0,
};
 
const generateNative: GeneratorType = (node, parent) => {
  const block = node.params.map(mapSyntax(parent)).reduce(mergeBlock, []);
 
  const operation = node.value.split('.').pop();
 
  if (alignCodes[operation] == null) {
    block.push({ kind: textMap[node.value], params: [immediates[node.value]] });
  } else {
    const alignment = alignCodes[operation];
 
    const params = [alignment, 0];
 
    block.push({ kind: textMap[node.value], params });
  }
 
  return block;
};
 
export default generateNative;