golden hour

/usr/include

File/Folder	Size	Actions
FlexLexer.h	6.07 KB
GL	-
KF5	-
X11	-
_G_config.h	1.26 KB
a.out.h	4.25 KB
aio.h	7.27 KB
aliases.h	2 KB
alloca.h	1.19 KB
apache2	-
ar.h	1.68 KB
argp.h	24.75 KB
argz.h	6.96 KB
arpa	-
asm	-
asm-generic	-
assert.h	3.52 KB
autosprintf.h	2.33 KB
bind9	-
bits	-
bsock	-
byteswap.h	1.41 KB
c++	-
com_err.h	2.07 KB
complex.h	3.62 KB
cpio.h	2.21 KB
cpufreq.h	5.8 KB
criu	-
crypt.h	2.22 KB
ctype.h	11.52 KB
curses.h	93.19 KB
cursesapp.h	6.62 KB
cursesf.h	27.05 KB
cursesm.h	19.09 KB
cursesp.h	8.3 KB
cursesw.h	48.24 KB
cursslk.h	7.13 KB
db.h	120.21 KB
db4.7.25	-
db_185.h	5.84 KB
dbm.h	1.37 KB
dirent.h	12.34 KB
dlfcn.h	6.88 KB
drm	-
e2p	-
elf.h	141.01 KB
endian.h	2.95 KB
entities.h	4.56 KB
envz.h	2.82 KB
err.h	2.18 KB
errno.h	2.33 KB
error.h	2.01 KB
et	-
eti.h	2.82 KB
etip.h	9.04 KB
execinfo.h	1.5 KB
expat.h	41.04 KB
expat_external.h	3.29 KB
ext2fs	-
fcntl.h	9.89 KB
features.h	12.87 KB
fenv.h	4.5 KB
fmtmsg.h	3.18 KB
fnmatch.h	2.27 KB
fontconfig	-
form.h	17.56 KB
fpu_control.h	3.5 KB
freetype2	-
fstab.h	3.04 KB
fts.h	5.17 KB
ftw.h	5.15 KB
gconv.h	5.16 KB
gcrypt-module.h	7.18 KB
gcrypt.h	76.51 KB
gd.h	32.02 KB
gd_io.h	1.13 KB
gdbm	-
gdbm.h	5.75 KB
gdcache.h	2.75 KB
gdfontg.h	623 B
gdfontl.h	621 B
gdfontmb.h	590 B
gdfonts.h	585 B
gdfontt.h	617 B
gdfx.h	2.34 KB
gelf.h	11.05 KB
getopt.h	6.53 KB
gettext-po.h	15.17 KB
glob.h	6.51 KB
gnu	-
gnu-versions.h	2.29 KB
google	-
gpg-error.h	23.66 KB
grp.h	6.75 KB
gshadow.h	4.43 KB
gssapi	-
gssapi.h	181 B
gssrpc	-
iconv.h	1.83 KB
idn-free.h	2.41 KB
idn-int.h	20 B
idna.h	3.48 KB
ieee754.h	4.81 KB
ifaddrs.h	2.77 KB
inttypes.h	11.61 KB
jconfig.h	1.7 KB
jerror.h	14.4 KB
jmorecfg.h	13.5 KB
jpeglib.h	49.12 KB
kadm5	-
kdb.h	60.12 KB
kde4	-
keyutils.h	7.08 KB
krad.h	8.72 KB
krb5	-
krb5.h	402 B
langinfo.h	15.57 KB
lastlog.h	126 B
lauxlib.h	5.64 KB
lber.h	14.95 KB
lber_types.h	1.43 KB
ldap.h	63.46 KB
ldap_cdefs.h	9.24 KB
ldap_features.h	1.77 KB
ldap_schema.h	9.23 KB
ldap_utf8.h	3.39 KB
ldif.h	4.58 KB
libaio.h	7.8 KB
libdb	-
libelf.h	19.11 KB
libexslt	-
libgen.h	1.37 KB
libintl.h	4.49 KB
libio.h	16.87 KB
libltdl	-
libpng15	-
libxml2	-
libxslt	-
limits.h	4.42 KB
link.h	6.99 KB
linux	-
locale.h	7.78 KB
ltdl.h	5.58 KB
lua.h	11.41 KB
lua.hpp	191 B
luaconf.h	21.64 KB
lualib.h	1 KB
lzma	-
lzma.h	9.51 KB
malloc.h	6.44 KB
math.h	15.7 KB
mcheck.h	2.4 KB
memory.h	962 B
menu.h	11.67 KB
misc	-
mntent.h	3.3 KB
monetary.h	1.73 KB
mqueue.h	3.7 KB
mtd	-
mysql	-
nc_tparm.h	4.05 KB
ncurses	-
ncurses.h	93.19 KB
ncurses_dll.h	3.83 KB
ncursesw	-
ndbm.h	2.39 KB
net	-
netash	-
netatalk	-
netax25	-
netdb.h	27.46 KB
neteconet	-
netinet	-
netipx	-
netiucv	-
netpacket	-
netrom	-
netrose	-
nfs	-
nl_types.h	1.73 KB
nlist.h	1.56 KB
nss.h	1.85 KB
obstack.h	18.84 KB
openssl	-
panel.h	3.97 KB
paths.h	2.91 KB
pcre.h	29.73 KB
pcre_scanner.h	6.45 KB
pcre_stringpiece.h	6.11 KB
pcrecpp.h	25.91 KB
pcrecpparg.h	6.62 KB
pcreposix.h	5.32 KB
png.h	113.36 KB
pngconf.h	20.94 KB
pnglibconf.h	6.3 KB
poll.h	22 B
pr29.h	2.07 KB
printf.h	6.56 KB
profile.h	11.87 KB
protobuf-c	-
protocols	-
pthread.h	39.95 KB
pty.h	1.51 KB
punycode.h	9.36 KB
pwd.h	5.87 KB
python2.7	-
python3.6m	-
quota	-
rdma	-
re_comp.h	957 B
regex.h	21.58 KB
regexp.h	6.89 KB
resolv.h	14.67 KB
rpc	-
rpcsvc	-
sasl	-
sched.h	4.55 KB
scsi	-
search.h	5.11 KB
security	-
selinux	-
semaphore.h	2.36 KB
sepol	-
setjmp.h	3.97 KB
sgtty.h	1.33 KB
shadow.h	5.1 KB
signal.h	13.3 KB
slapi-plugin.h	37.45 KB
sound	-
spawn.h	6.53 KB
stab.h	264 B
stdc-predef.h	1.59 KB
stdint.h	7.94 KB
stdio.h	30.9 KB
stdio_ext.h	2.74 KB
stdlib.h	33.23 KB
string.h	21.75 KB
stringprep.h	8 KB
strings.h	4.55 KB
sys	-
syscall.h	25 B
sysexits.h	5.11 KB
syslog.h	24 B
tar.h	3.67 KB
tcpd.h	11.48 KB
term.h	38.63 KB
term_entry.h	7.91 KB
termcap.h	3.4 KB
termio.h	214 B
termios.h	3.52 KB
tgmath.h	18.11 KB
thread_db.h	15.65 KB
tic.h	12.35 KB
tiff.h	34.95 KB
tiffconf-64.h	3.35 KB
tiffconf.h	250 B
tiffio.h	22.52 KB
tiffio.hxx	1.66 KB
tiffvers.h	410 B
time.h	13.4 KB
tld.h	4.54 KB
ttyent.h	2.44 KB
uapi	-
uchar.h	2.42 KB
ucontext.h	1.92 KB
ulimit.h	1.55 KB
unctrl.h	3.03 KB
unistd.h	41.78 KB
ustat.h	23 B
utime.h	1.5 KB
utmp.h	3.16 KB
utmpx.h	4.02 KB
uuid	-
values.h	1.92 KB
verto-module.h	6.48 KB
verto.h	18.57 KB
video	-
wait.h	22 B
wchar.h	31.37 KB
wctype.h	10.89 KB
wordexp.h	2.47 KB
xcb	-
xen	-
xlocale.h	1.66 KB
zconf.h	14.92 KB
zlib.h	84.68 KB

Edit: fpu_control.h

/* FPU control word bits.  x86 version.
   Copyright (C) 1993-2012 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Olaf Flebbe.

The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _FPU_CONTROL_H
#define _FPU_CONTROL_H	1

/* Note that this file sets on x86-64 only the x87 FPU, it does not
   touch the SSE unit.  */

/* Here is the dirty part. Set up your 387 through the control word
 * (cw) register.
 *
 *     15-13    12  11-10  9-8     7-6     5    4    3    2    1    0
 * | reserved | IC | RC  | PC | reserved | PM | UM | OM | ZM | DM | IM
 *
 * IM: Invalid operation mask
 * DM: Denormalized operand mask
 * ZM: Zero-divide mask
 * OM: Overflow mask
 * UM: Underflow mask
 * PM: Precision (inexact result) mask
 *
 * Mask bit is 1 means no interrupt.
 *
 * PC: Precision control
 * 11 - round to extended precision
 * 10 - round to double precision
 * 00 - round to single precision
 *
 * RC: Rounding control
 * 00 - rounding to nearest
 * 01 - rounding down (toward - infinity)
 * 10 - rounding up (toward + infinity)
 * 11 - rounding toward zero
 *
 * IC: Infinity control
 * That is for 8087 and 80287 only.
 *
 * The hardware default is 0x037f which we use.
 */

#include <features.h>

/* masking of interrupts */
#define _FPU_MASK_IM  0x01
#define _FPU_MASK_DM  0x02
#define _FPU_MASK_ZM  0x04
#define _FPU_MASK_OM  0x08
#define _FPU_MASK_UM  0x10
#define _FPU_MASK_PM  0x20

/* precision control */
#define _FPU_EXTENDED 0x300	/* libm requires double extended precision.  */
#define _FPU_DOUBLE   0x200
#define _FPU_SINGLE   0x0

/* rounding control */
#define _FPU_RC_NEAREST 0x0    /* RECOMMENDED */
#define _FPU_RC_DOWN    0x400
#define _FPU_RC_UP      0x800
#define _FPU_RC_ZERO    0xC00

#define _FPU_RESERVED 0xF0C0  /* Reserved bits in cw */

/* The fdlibm code requires strict IEEE double precision arithmetic,
   and no interrupts for exceptions, rounding to nearest.  */

#define _FPU_DEFAULT  0x037f

/* IEEE:  same as above.  */
#define _FPU_IEEE     0x037f

/* Type of the control word.  */
typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));

/* Macros for accessing the hardware control word.  "*&" is used to
   work around a bug in older versions of GCC.  __volatile__ is used
   to support combination of writing the control register and reading
   it back.  Without __volatile__, the old value may be used for reading
   back under compiler optimization.

Note that the use of these macros is not sufficient anymore with
   recent hardware nor on x86-64.  Some floating point operations are
   executed in the SSE/SSE2 engines which have their own control and
   status register.  */
#define _FPU_GETCW(cw) __asm__ __volatile__ ("fnstcw %0" : "=m" (*&cw))
#define _FPU_SETCW(cw) __asm__ __volatile__ ("fldcw %0" : : "m" (*&cw))

/* Default control word set at startup.  */
extern fpu_control_t __fpu_control;

#endif	/* fpu_control.h */