v8/test/mjsunit/math-floor-negative.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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// Flags: --noenable-sse4-1 --allow-natives-syntax

function test1() {
  // Trigger overflow when converting/truncating double to integer.
  // Divide by 10 to avoid overflow when smi-tagging at the end.
  return Math.floor(-100000000000.5) / 10;
};
%PrepareFunctionForOptimization(test1);
function test2() {
  // Trigger no overflow.
  return Math.floor(-100.2);
};
%PrepareFunctionForOptimization(test2);
function test3() {
  // Trigger overflow when compensating by subtracting after compare.
  // Divide by 10 to avoid overflow when smi-tagging at the end.
  return Math.floor(-2147483648.1) / 10;
};
%PrepareFunctionForOptimization(test3);
test1();
test1();
%OptimizeFunctionOnNextCall(test1);
test2();
test2();
%OptimizeFunctionOnNextCall(test2);
test3();
test3();
%OptimizeFunctionOnNextCall(test3);

assertEquals(-10000000000.1, test1());
assertEquals(-101, test2());
assertEquals(-214748364.9, test3());