Embed trigonometric lookup table.

tools/generate-trig-table.py

+#!/usr/bin/env python
+#
 # Copyright 2013 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
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
 #       with the distribution.
 #     * Neither the name of Google Inc. nor the names of its
 #       contributors may be used to endorse or promote products derived
 #       from this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import os
+# This is a utility for populating the lookup table for the
+# approximation of trigonometric functions.
 
-from testrunner.local import testsuite
-from testrunner.objects import testcase
+import sys, math
 
+SAMPLES = 1800
 
-class IntlTestSuite(testsuite.TestSuite):
+TEMPLATE = """\
+// Copyright 2013 Google Inc. All Rights Reserved.
 
-  def __init__(self, name, root):
-    super(IntlTestSuite, self).__init__(name, root)
+// This file was generated from a python script.
 
-  def ListTests(self, context):
-    tests = []
-    for dirname, dirs, files in os.walk(self.root):
-      for dotted in [x for x in dirs if x.startswith('.')]:
-        dirs.remove(dotted)
-      dirs.sort()
-      files.sort()
-      for filename in files:
-        if (filename.endswith(".js") and filename != "assert.js" and
-            filename != "utils.js"):
-          testname = os.path.join(dirname[len(self.root) + 1:], filename[:-3])
-          test = testcase.TestCase(self, testname)
-          tests.append(test)
-    return tests
+#include "v8.h"
+#include "trig-table.h"
 
-  def GetFlagsForTestCase(self, testcase, context):
-    flags = ["--allow-natives-syntax"] + context.mode_flags
+namespace v8 {
+namespace internal {
 
-    files = []
-    files.append(os.path.join(self.root, "assert.js"))
-    files.append(os.path.join(self.root, "utils.js"))
-    files.append(os.path.join(self.root, testcase.path + self.suffix()))
+  const double TrigonometricLookupTable::kSinTable[] =
+      { %(sine_table)s };
+  const double TrigonometricLookupTable::kCosXIntervalTable[] =
+      { %(cosine_table)s };
+  const int TrigonometricLookupTable::kSamples = %(samples)i;
+  const int TrigonometricLookupTable::kTableSize = %(table_size)i;
+  const double TrigonometricLookupTable::kSamplesOverPiHalf =
+      %(samples_over_pi_half)s;
 
-    flags += files
-    if context.isolates:
-      flags.append("--isolate")
-      flags += files
+} }  // v8::internal
+"""
 
-    return testcase.flags + flags
+def main():
+  pi_half = math.pi / 2
+  interval = pi_half / SAMPLES
+  sin = []
+  cos_times_interval = []
+  table_size = SAMPLES + 2
 
+  for i in range(0, table_size):
+    sample = i * interval
+    sin.append(repr(math.sin(sample)))
+    cos_times_interval.append(repr(math.cos(sample) * interval))
 
-def GetSuite(name, root):
-  return IntlTestSuite(name, root)
+  output_file = sys.argv[1]
+  output = open(str(output_file), "w")
+  output.write(TEMPLATE % {
+    'sine_table': ','.join(sin),
+    'cosine_table': ','.join(cos_times_interval),
+    'samples': SAMPLES,
+    'table_size': table_size,
+    'samples_over_pi_half': repr(SAMPLES / pi_half)
+  })
+
+if __name__ == "__main__":
+  main()
+