FIX: Unable to Set Flush-to-Zero Mode Using _controlfp() (307611)

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: The English version of this fix should have the following file attributes or later:

Date	Time	Version	Size	Name	Platform
24-Sep-2001	10:58	7.0.2600.14 (xpclnt_qfe.010827-1804)	941,056	Msvcrt.dll	IA64

NOTE: If this product was already installed on your computer when you purchased it from the original equipment manufacturer (and you need this fix), please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, a fee may be charged. This fee is refundable if it is determined that you only require the fix you requested. However, this fee is non-refundable if you request additional technical support, if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support.

This problem occurs in IA64 applications that are built with Win64 tools from the August 2001 (build 9234) Platform Software Development Kit (SDK). This fix is only for the CRT .dll file. Fixes to the CRT static libraries will be shipped in an upcoming Platform SDK.

#include <stdio.h>
#include <float.h>

int main( int argc, char ** argv)
{
  printf( "Before calling _controlfp()\n");

  _controlfp( _DN_FLUSH, _MCW_DN);

  printf( "After calling _controlfp()\n");
}