diff options
Diffstat (limited to 'src/3rdparty/v8/test/mjsunit/math-exp-precision.js')
-rw-r--r-- | src/3rdparty/v8/test/mjsunit/math-exp-precision.js | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/src/3rdparty/v8/test/mjsunit/math-exp-precision.js b/src/3rdparty/v8/test/mjsunit/math-exp-precision.js deleted file mode 100644 index ace7edc..0000000 --- a/src/3rdparty/v8/test/mjsunit/math-exp-precision.js +++ /dev/null @@ -1,64 +0,0 @@ -// 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 -// 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. - -// Tests that the --fast-math implementation of Math.exp() has -// reasonable precision. - -function exp(x) { - return Math.exp(x); -} - -var first_call_result = exp(Math.PI); -var second_call_result = exp(Math.PI); - -function assertAlmostEquals(expected, actual, x) { - if (expected == 0 && actual == 0) return; // OK - if (expected == Number.POSITIVE_INFINITY && - actual == Number.POSITIVE_INFINITY) { - return; // OK - } - relative_diff = Math.abs(expected/actual - 1); - assertTrue(relative_diff < 1e-12, "relative difference of " + relative_diff + - " for input " + x); -} - -var increment = Math.PI / 35; // Roughly 0.1, but we want to try many - // different mantissae. -for (var x = -708; x < 710; x += increment) { - var ex = exp(x); - var reference = Math.pow(Math.E, x); - assertAlmostEquals(reference, ex, x); - if (ex > 0 && isFinite(ex)) { - var back = Math.log(ex); - assertAlmostEquals(x, back, x + " (backwards)"); - } -} - -// Make sure optimizing the function does not alter the result. -var last_call_result = exp(Math.PI); -assertEquals(first_call_result, second_call_result); -assertEquals(first_call_result, last_call_result); |