lib/msun: Cleanup after $FreeBSD$ removal

Remove no longer needed explicit inclusion of sys/cdefs.h.

PR: 276669
MFC after: 1 week

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

* Use 9 digits instead of 11 digits in efx and efx8.

* Update the domain and range of comments for the polynomial
approximations, including using the the correct variable names
(e.g., pp(x) inst

* Use 9 digits instead of 11 digits in efx and efx8.

* Update the domain and range of comments for the polynomial
approximations, including using the the correct variable names
(e.g., pp(x) instead of p(x)).

* Use hex values of the form 0x3e0375d4 instead of 0x1.06eba8p-3,
which was obtained from printf("%.6a").

* In the domain [0.84375, 1.25], qa(x) can be reduced from a 4th
order polynomial to 3rd order.

* In the domain [1.25,1/0.35], sa(x) can be reduced from a 4th
order polynomial to 3rd order.

* In the domain [1/0.35, 11], the 4th order polynomials rb(x) and
sb(x) can be reduced to 2nd and 3rd order, respectively.

show more ...

* Update the comments that refer to erf[c](nan) and erf[c](+-inf)
to use erf[c]f.

* Use the volatile qualifier for 'tiny' to prevent compilers
from erronously constant folding expressions of the form
'1 - tiny'. This allows erf[f](x) to raise INEXACT.

* Use 0.5, 1, and 2, wh

* Use the volatile qualifier for 'tiny' to prevent compilers
from erronously constant folding expressions of the form
'1 - tiny'. This allows erf[f](x) to raise INEXACT.

* Use 0.5, 1, and 2, which are exactly representable in radix-2
floating point formats. This reduces diffs between s_erf[fl].c.

* While here, add a comment about efx and efx8.

show more ...

Merge head r233826 through r256722.

IFC @256277

Approved by: ken (mentor)

IFC @ r255692

Comment out IA32_MISC_ENABLE MSR access - this doesn't exist on AMD.
Need to sort out how arch-specific MSRs will be handled.

Merge from head

IFC @ r255209

MFC

* s_erf.c:
. Use integer literal constants instead of double literal constants.

* s_erff.c:
. Use integer literal constants instead of casting double literal
constants to float.
. Update t

* s_erf.c:
. Use integer literal constants instead of double literal constants.

* s_erff.c:
. Use integer literal constants instead of casting double literal
constants to float.
. Update the threshold values from those carried over from erf() to
values appropriate for float.
. New sets of polynomial coefficients for the rational approximations.
These coefficients have little, but positive, effect on the maximum
error in ULP in the four intervals, but do improve the overall
speed of execution.
. Remove redundant GET_FLOAT_WORD(ix,x) as hx already contained the
contents that is packed into ix.
. Update the mask that is used to zero-out lower-order bits in x in
the intervals [1.25, 2.857143] and [2.857143, 12]. In tests on
amd64, this change improves the maximum error in ULP from 6.27739
and 63.8095 to 3.16774 and 2.92095 on these intervals for erffc().

Reviewed by: bde

show more ...

s/rcsid/__FBSDID/

Fix formatting, this is hard to explain, so I'll show one example.

- float ynf(int n, float x) /* wrapper ynf */
+float
+ynf(int n, float x) /* wrapper ynf */

This is because the __S

Fix formatting, this is hard to explain, so I'll show one example.

- float ynf(int n, float x) /* wrapper ynf */
+float
+ynf(int n, float x) /* wrapper ynf */

This is because the __STDC__ stuff was indented.

Reviewed by: md5

show more ...

Assume __STDC__, remove non-__STDC__ code.

Reviewed by: md5

$Id$ -> $FreeBSD$

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

show more ...

Remove trailing whitespace.

J.T. Conklin's latest version of the Sun math library.

-- Begin comments from J.T. Conklin:
The most significant improvement is the addition of "float" versions
of the math functions that take float

J.T. Conklin's latest version of the Sun math library.

-- Begin comments from J.T. Conklin:
The most significant improvement is the addition of "float" versions
of the math functions that take float arguments, return floats, and do
all operations in floating point. This doesn't help (performance)
much on the i386, but they are still nice to have.

The float versions were orginally done by Cygnus' Ian Taylor when
fdlibm was integrated into the libm we support for embedded systems.
I gave Ian a copy of my libm as a starting point since I had already
fixed a lot of bugs & problems in Sun's original code. After he was
done, I cleaned it up a bit and integrated the changes back into my
libm.
-- End comments

Reviewed by: jkh
Submitted by: jtc

show more ...

s/rcsid/__FBSDID/

Fix formatting, this is hard to explain, so I'll show one example.

- float ynf(int n, float x) /* wrapper ynf */
+float
+ynf(int n, float x) /* wrapper ynf */

This is because the __S

Fix formatting, this is hard to explain, so I'll show one example.

- float ynf(int n, float x) /* wrapper ynf */
+float
+ynf(int n, float x) /* wrapper ynf */

This is because the __STDC__ stuff was indented.

Reviewed by: md5

show more ...