34462 2010-02-01 19:37:14 -0800 Fix a bug that Math.round() returns incorrect results for huge integers 2010-02-01 20:51:16 -0800 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) All All RESOLVED FIXED P2 Normal --- 1 tkent webkit-unassigned darin oldest_to_newest 186764 0 tkent 2010-02-01 19:37:14 -0800 Fix a bug that Math.round() retunrs incorrect results for huge integers 186765 1 47901 tkent 2010-02-01 19:38:48 -0800 Created attachment 47901 Patch 186767 2 47901 darin 2010-02-01 19:46:59 -0800 Comment on attachment 47901 Patch How about this instead? - if (signbit(arg) && arg >= -0.5) - return jsNumber(exec, -0.0); - return jsNumber(exec, floor(arg + 0.5)); + double integer = ceil(arg); + return jsNumber(exec, integer - (integer - arg > 0.5)); 186768 3 47901 darin 2010-02-01 19:47:56 -0800 Comment on attachment 47901 Patch Patch seems fine. But you should consider my patch with ceil that avoids the need for the separate if statement. You could use ? : instead of the way I did it. Or use my code exactly as is (as long as it passes your tests). 186769 4 darin 2010-02-01 19:48:58 -0800 Would be nice to have tests cases for the maximum and minimum double values as well to make sure they don't turn into infinity when rounded. 186782 5 tkent 2010-02-01 20:51:16 -0800 Thank you for the quick review. Ok, I followed the proposed code, and add test cases for minimum/maximum values. Landed as r54197 and r54198. 47901 2010-02-01 19:38:48 -0800 2010-02-01 19:47:55 -0800 Patch bug-34462-20100202123847.patch text/plain 3724 tkent ZGlmZiAtLWdpdCBhL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZyBiL0phdmFTY3JpcHRDb3JlL0No YW5nZUxvZwppbmRleCA5NWJiNzA2Li42Y2M5MjVjIDEwMDY0NAotLS0gYS9KYXZhU2NyaXB0Q29y ZS9DaGFuZ2VMb2cKKysrIGIvSmF2YVNjcmlwdENvcmUvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMTMg QEAKKzIwMTAtMDItMDEgIEtlbnQgVGFtdXJhICA8dGtlbnRAY2hyb21pdW0ub3JnPgorCisgICAg ICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIEZpeCBhIGJ1ZyB0aGF0 IE1hdGgucm91bmQoKSByZXR1bnJzIGluY29ycmVjdCByZXN1bHRzIGZvciBodWdlIGludGVnZXJz CisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0zNDQ2Mgor CisgICAgICAgICogcnVudGltZS9NYXRoT2JqZWN0LmNwcDoKKyAgICAgICAgKEpTQzo6bWF0aFBy b3RvRnVuY1JvdW5kKTogQXZvaWQgImFyZyArIDAuNSIuCisKIDIwMTAtMDItMDEgIEt3YW5nIFl1 bCBTZW8gIDxza3l1bEBjb21wYW55MTAwLm5ldD4KIAogICAgICAgICBSZXZpZXdlZCBieSBFcmlj IFNlaWRlbC4KZGlmZiAtLWdpdCBhL0phdmFTY3JpcHRDb3JlL3J1bnRpbWUvTWF0aE9iamVjdC5j 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