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+.\"	$OpenBSD: get_fpc_csr.3,v 1.1 2010/09/24 13:54:05 miod Exp $
+.\"
+.\" Copyright (c) 2010 Miodrag Vallat.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: September 24 2010 $
+.Dt GET_FPC_CSR 3
+.Os
+.Sh NAME
+.Nm get_fpc_csr ,
+.Nm set_fpc_csr
+.Nd Floating-point control register access
+.Sh SYNOPSIS
+.In machine/fpu.h
+.Ft int
+.Fn get_fpc_csr
+.Ft int
+.Fn set_fpc_csr "int csr"
+.Sh DESCRIPTION
+The
+.Fn get_fpc_csr
+function returns the curent value of the floating-point control register.
+The
+.Fn set_fpc_csr
+function replaces the value of the floating-point control register with
+.Fa csr
+and returns the previous value.
+.Pp
+These functions are provided for
+.Tn IRIX
+compatibility, and should only be used to control the value of the
+.Li FPCSR_FS
+bit in the floating-point control register.
+Portable code should use the
+.Nm fpgetmask ,
+.Nm fpgetround ,
+.Nm fpgetsticky ,
+.Nm fpsetmask ,
+.Nm fpsetround
+and
+.Nm fpsetsticky
+functions to inquire or alter the floating-point control register.
+.Sh RETURN VALUES
+The
+.Nm get_fpc_csr
+and
+.Nm set_fpc_csr
+functions return the
+.Pq previous
+value of the floating-point control register.
+.Sh SEE ALSO
+.Xr fpgetmask 2 ,
+.Xr fpgetround 2 ,
+.Xr fpgetsticky 2 ,
+.Xr fpsetmask 2 ,
+.Xr fpsetround 2 ,
+.Xr fpsetsticky 2