src/v8/test/mjsunit/regress/regress-transcendental.js

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// Flags: --expose-gc

// Test whether the runtime implementation and generated code of
// sine and tangens return the same results.

function test(f, x, name) {
  // Reset transcendental cache.
  gc();
  // Initializing cache leads to a runtime call.
  var runtime_result = f(x);
  // Flush transcendental cache entries and optimize f.
  for (var i = 0; i < 100000; i++) f(i);
  // Calculate using generated code.
  var gencode_result = f(x);
  print(name + " runtime function: " + runtime_result);
  print(name + " generated code  : " + gencode_result);
  assertEquals(gencode_result, runtime_result);
}

test(Math.tan, -1.57079632679489660000, "Math.tan");
test(Math.sin, 6.283185307179586, "Math.sin");