FIX: The value that the trigonometric method in a Visual C++ 2008 SP1 application returns on an x86 platform may differ from the value that the same method returns on an x64 platform

To resolve this issue, apply the following hotfix. This hotfix changes the trigonometric method for the x64 platform to implement the method in assembly instead of a C function. The assembly code reduces the reliance on the compiler-intrinsic and compiler-generated code. Therefore, the hotfix improves the accuracy of the trigonometric method.

Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft website:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Note To download this hotfix, you can also visit the following Microsoft website:

Prerequisites

To apply this hotfix, you must have Microsoft Visual Studio 2008 Service Pack 1 (SP1) installed.

Restart requirement

You must restart the computer after you apply the hotfix if any Visual Studio instance is running.

Hotfix replacement information

This hotfix does not replace any other hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.