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+.\" Written Sat Mar  8 10:35:08 MEZ 1997 by J. "MUFTI" Scheurich (mufti@csv.ica.uni-stuttgart.de)
+.TH __SETFPUCW 3 1997-03-08 "i386 Linux Man Page" "Linux Programmer's Manual"
+.SH NAME
+__setfpucw \- set fpu control word on i386 architecture (obsolete)
+.SH SYNOPSIS
+.B #include <i386/fpu_control.h>
+.sp
+.BI "void __setfpucw((unsigned short) " control_word );
+.br
+.SH DESCRIPTION
+.B __setfpucw
+transfers
+.I control_word 
+to the registers of the fpu (floating point unit) on i386 architecture. This 
+was used to control floating point precision, rounding and floating point 
+exceptions.
+.SH EXAMPLE
+
+.BR __setfpucw(0x1372)
+
+Set fpu control word on i386 architecture to
+.br
+     - extended precision
+.br     
+     - rounding to nearest
+.br     
+     - exceptions on overflow, zero divide and NaN
+.br 
+.SH AVAILABILITY
+As of glibc 2.1 this function does not exist anymore.
+There are new functions from ISO C99, with prototypes in
+.IR /usr/include/fenv.h ,
+to control fpu rounding modes, like
+.IR fegetround ,
+.IR fesetround ,
+and the floating point environment, like
+.IR fegetenv ,
+.IR feholdexcept ,
+.IR fesetenv ,
+.IR feupdateenv 
+and fpu exception handling, like
+.IR feclearexcept ,
+.IR fegetexceptflag ,
+.IR feraiseexcept ,
+.IR fesetexceptflag ,
+.IR fetestexcept .
+.PP
+If direct acces to the FPU control word is still needed, the _FPU_GETCW
+and _FPU_SETCW macros from
+.I /usr/include/fpu_control.h
+can be used.
+.SH "SEE ALSO"
+.BR feclearexcept (3)
+.br
+.IR /usr/include/i386/fpu_control.h