Reland "Handle non-power-of-2 divisors in division-like operations".

test/mjsunit/math-floor-of-div.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
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 //     * Redistributions in binary form must reproduce the above
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@@ skipping 268 matching lines @@
 
 test_div_deopt_minus_zero_v();
 test_div_deopt_overflow_v();
 test_div_deopt_div_by_zero_v();
 %OptimizeFunctionOnNextCall(test_div_deopt_minus_zero_v);
 %OptimizeFunctionOnNextCall(test_div_deopt_overflow_v);
 %OptimizeFunctionOnNextCall(test_div_deopt_div_by_zero_v);
 test_div_deopt_minus_zero_v();
 test_div_deopt_overflow_v();
 test_div_deopt_div_by_zero_v();
+
+
+// Test for flooring division with negative dividend.
+function flooring_div_by_3(y) {
+  return Math.floor(y / 3);
+}
+
+assertEquals(-1, flooring_div_by_3(-2));
+assertEquals(-1, flooring_div_by_3(-2));
+%OptimizeFunctionOnNextCall(flooring_div_by_3);
+assertEquals(-1, flooring_div_by_3(-2));