Bug 123933

Summary:

Multiplying a floating Number from an Array calculates incorrectly

Product:

WebKit

Reporter:

Robert <zoshe>

Component:

JavaScriptCore

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED INVALID

Severity:

Major

CC:

ahmad.saleem792, ap, bfulgham, iseki.m.aa, rniwa, ysuzuki

Priority:

Version:

528+ (Nightly build)

Hardware:

Mac (Intel)

OS:

OS X 10.8

Attachments:

Description	Flags
Test Results	none
Safari 15.6 matches with the browsers	none

Robert

Reported 2013-11-06 15:16:02 PST

Created attachment 216231 [details] Test Results <script> var aaa = {numFloat:.55}; var bbb = 100 - (aaa.numFloat * 100); //Should be 45. Not 44.99999999999999 var ccc = aaa.numFloat * 100; // Should be 55,. Not 55.00000000000001 </script>

Attachments
Test Results (738 bytes, text/html) 2013-11-06 15:16 PST, Robert	no flags	Details
Safari 15.6 matches with the browsers (929.35 KB, image/png) 2022-07-21 15:21 PDT, Ahmad Saleem	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Ahmad Saleem

Comment 1 2022-07-21 15:21:19 PDT

Created attachment 461126 [details] Safari 15.6 matches with the browsers As can be seen from attached screenshot, all browsers have same output. I think this can be marked as "RESOLVED INVALID" or "RESOLVED WONTFIX". Thanks!

Yusuke Suzuki

Comment 2 2022-07-21 15:30:24 PDT

This is the right behavior. IEEE 754 defines this result, and all JS numbers are double.

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