Merge bleeding_edge 17696:18016.

tools/generate-trig-table.py

Index: tools/generate-trig-table.py
diff --git a/tools/lexer_generator/test_suite.py b/tools/generate-trig-table.py
similarity index 53%
copy from tools/lexer_generator/test_suite.py
copy to tools/generate-trig-table.py
index 19d0b07efeedf7604a29aa9eaa66e1be3d1337bc..14d4472aadb28ad5947f83a42b83edec568a12cf 100644
--- a/tools/lexer_generator/test_suite.py
+++ b/tools/generate-trig-table.py
@@ -1,3 +1,5 @@
+#!/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
@@ -25,22 +27,58 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-from unittest import TestLoader, TextTestRunner, TestSuite
+# This is a utility for populating the lookup table for the
+# approximation of trigonometric functions.
+
+import sys, math
+
+SAMPLES = 1800
+
+TEMPLATE = """\
+// Copyright 2013 Google Inc. All Rights Reserved.
+
+// This file was generated from a python script.
+
+#include "v8.h"
+#include "trig-table.h"
 
-from automata_test import *
-from code_generator_test import *
-from lexer_test import *
-from rule_parser_test import *
-from transition_key_test import *
+namespace v8 {
+namespace internal {
+
+  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;
+
+} }  // v8::internal
+"""
+
+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))
+
+  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__":
-  loader = TestLoader()
-  suite = TestSuite((
-    loader.loadTestsFromTestCase(TransitionKeyTestCase),
-    loader.loadTestsFromTestCase(AutomataTestCase),
-    loader.loadTestsFromTestCase(RuleParserTestCase),
-    loader.loadTestsFromTestCase(LexerTestCase),
-    loader.loadTestsFromTestCase(CodeGeneratorTestCase),
-  ))
-  runner = TextTestRunner(verbosity = 2)
-  runner.run(suite)
+  main()
+