Document the fpgetprec/fpsetprec functions in their man page.
Add cross-references to the elusive fpsetmask() function to various other man pages. Reviewed by: bde
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jlemon
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@ -218,6 +218,7 @@ or
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.Xr sigaltstack 2 ,
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.Xr sigprocmask 2 ,
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.Xr sigsuspend 2 ,
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.Xr fpsetmask 3 ,
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.Xr setjmp 3 ,
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.Xr tty 4
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.Sh HISTORY
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@ -30,7 +30,7 @@
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.\" SUCH DAMAGE.
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.\"
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.\" From: @(#)sigaction.2 8.2 (Berkeley) 4/3/94
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.\" $Id: sigaction.2,v 1.14 1997/09/13 19:43:24 joerg Exp $
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.\" $Id: sigaction.2,v 1.15 1998/01/02 19:22:48 alex Exp $
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.\"
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.Dd April 3, 1994
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.Dt SIGACTION 2
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@ -404,6 +404,7 @@ flags are featuring options commonly found in other operating systems.
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.Xr sigsuspend 2 ,
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.Xr sigvec 2 ,
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.Xr wait 2 ,
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.Xr fpsetmask 3 ,
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.Xr setjmp 3 ,
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.Xr siginterrupt 3 ,
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.Xr sigsetops 3 ,
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@ -111,6 +111,7 @@ has a value other than those listed here.
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.Xr kill 2 ,
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.Xr sigaction 2 ,
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.Xr sigsuspend 2 ,
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.Xr fpsetmask 3 ,
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.Xr sigsetops 3
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.Sh STANDARDS
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The
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@ -30,7 +30,7 @@
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)math.3 6.10 (Berkeley) 5/6/91
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.\" $Id: math.3,v 1.5 1997/02/22 15:09:39 peter Exp $
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.\" $Id: math.3,v 1.6 1998/01/15 23:28:18 danny Exp $
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.\"
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.TH MATH 3M "May 6, 1991"
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.UC 4
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@ -623,6 +623,15 @@ IEEE 754 defaults for granted; this means that a decision to
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trap all divisions by zero could disrupt a code that would
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otherwise get correct results despite division by zero.
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.SH SEE ALSO
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\fBfpgetround\fR(3),
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\fBfpsetround\fR(3),
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\fBfpgetprec\fR(3),
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\fBfpsetprec\fR(3),
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\fBfpgetmask\fR(3),
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\fBfpsetmask\fR(3),
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\fBfpgetsticky\fR(3),
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\fBfpresetsticky\fR(3) - IEEE floating point interface
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.SH NOTES
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An explanation of IEEE 754 and its proposed extension p854
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was published in the IEEE magazine MICRO in August 1984 under
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the title "A Proposed Radix\- and Word\-length\-independent
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@ -1,5 +1,5 @@
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# @(#)Makefile 8.2 (Berkeley) 12/13/93
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# $Id$
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# $Id: Makefile,v 1.12 1997/02/22 13:24:13 peter Exp $
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MAN3= assert.3 bitstring.3 end.3 fpgetround.3 intro.3 pthread.3 queue.3 \
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stdarg.3 sysexits.3
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@ -11,6 +11,7 @@ MLINKS+=end.3 edata.3 end.3 etext.3
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MLINKS+=fpgetround.3 fpsetround.3 fpgetround.3 fpgetmask.3
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MLINKS+=fpgetround.3 fpsetmask.3 fpgetround.3 fpgetsticky.3
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MLINKS+=fpgetround.3 fpsetsticky.3 fpgetround.3 fpresetsticky.3
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MLINKS+=fpgetround.3 fpsetprec.3 fpgetround.3 fpgetprec.3
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MLINKS+=queue.3 SLIST_ENTRY.3 queue.3 SLIST_HEAD.3 queue.3 SLIST_INIT.3
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MLINKS+=queue.3 SLIST_INSERT_AFTER.3 queue.3 SLIST_INSERT_HEAD.3
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MLINKS+=queue.3 SLIST_REMOVE_HEAD.3 queue.3 SLIST_REMOVE.3
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@ -30,7 +30,7 @@
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)fpgetround.3 1.0 (Berkeley) 9/23/93
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.\" $Id: fpgetround.3,v 1.4 1997/03/19 20:42:18 bde Exp $
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.\" $Id: fpgetround.3,v 1.5 1997/04/13 14:19:59 bde Exp $
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.\"
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.Dd August 23, 1993
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.Dt FPGETROUND 3
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@ -38,6 +38,8 @@
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.Sh NAME
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.Nm fpgetround ,
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.Nm fpsetround ,
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.Nm fpsetprec ,
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.Nm fpgetprec ,
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.Nm fpgetmask ,
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.Nm fpsetmask ,
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.Nm fpgetsticky ,
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@ -47,16 +49,16 @@
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.Fd #include <floatingpoint.h>
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.Ft typedef enum {
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.br
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.Fa FP_RN,
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.Fa FP_RN,
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.Li /* round to nearest */
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.br
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.Fa FP_RM,
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.Fa FP_RM,
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.Li /* round to minus infinity */
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.br
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.Fa FP_RP,
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.Fa FP_RP,
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.Li /* round to plus infinity */
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.br
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.Fa FP_RZ,
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.Fa FP_RZ,
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.Li /* truncate */
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.br
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.Ft } fp_rnd_t;
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@ -65,6 +67,29 @@
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.Fn fpgetround void
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.Ft fp_rnd_t
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.Fn fpsetround "fp_rnd_t direction"
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.Pp
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.nr fZ 0
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.Ft typedef enum {
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.br
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.Fa FP_PS,
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.Li /* 24 bit (single-precision) */
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.br
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.Fa FP_PRS,
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.Li /* reserved */
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.br
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.Fa FP_PD,
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.Li /* 53 bit (double-precision) */
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.br
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.Fa FP_PE,
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.Li /* 64 bit (extended-precision) */
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.br
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.Ft } fp_prec_t;
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.Pp
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.Ft fp_prec_t
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.Fn fpgetprec void
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.Ft fp_prec_t
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.Fn fpsetprec "fp_prec_t precision"
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.Pp
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.Fd #define fp_except_t int
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.Fd #define FP_X_INV 0x01 /* invalid */
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.Fd #define FP_X_OFL 0x08 /* overflow */
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@ -85,7 +110,8 @@ When a floating point exception is detected, the exception sticky flag is
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set and the exception mask is tested. If the mask is set, then a trap
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occurs. These routines allow both setting the floating point exception
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masks, and resetting the exception sticky flags after an exception is
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detected. In addition, they allow setting the floating point rounding mode.
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detected. In addition, they allow setting the floating point rounding mode
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and precision.
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.Pp
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The
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.Fn fpgetround
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@ -99,6 +125,17 @@ sets the floating point rounding mode and returns
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the previous mode.
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.Pp
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The
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.Fn fpgetprec
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function
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returns the current floating point precision.
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.Pp
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The
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.Fn fpsetprec
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function
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sets the floating point precision and returns
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the previous precision.
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.Pp
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The
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.Fn fpgetmask
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function
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returns the current floating point exception masks.
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