avoid uninitialised variable accesses.

if __kernel_rem_pio2() or __kernel_rem_pio2f() are called with "nx" less
than 2, the local variable fq[0] may be accessed uninitialised.

__kernel_rem_pio2() has direct calls with nx = 1, and __kernel_rem_pio2f()
is called with a value starting at 3, but may be decreased to less than 2,
implied by this code , if not actually avoided by the tx[] setup above:
nx = 3;
while(tx[nx-1]==zero) nx--; /* skip zero term */
n = __kernel_rem_pio2f(tx,y,e0,nx,2,two_over_pi);

found by GCC 12.

Correct misleading indentation. NFC

From GCC8

-build ldexp/frexp/modf locally again rather than relying on libc
reaching over, to get things into a sane state,
-do the usual namespace protection game with scalbn(f) because it
is used internally
(more symbol renamings are necessary)

The weak_alias change for mc68881 is untested.

__STDC__ is always defined on NetBSD.

More trailing white space.

rcsid facism, WARNSify

Id -> NetBSD

LIBM_SCCS must be defined for the RCS ID to be defined.
This library will soon be used by DJGPP. And since memory is often tight
on DOS machines, there is little benifit to be had from including RCS IDs.

Change int -> int32_t and unsigned int -> u_int32_t to improve portabilty
to machines where int != 32 bits.

Float versions of math functions. From Ian Taylor (ian@cygnus.com), with
minor changes by me.

Correct misleading indentation. NFC

From GCC8

-build ldexp/frexp/modf locally again rather than relying on libc
reaching over, to get things into a sane state,
-do the usual namespace protection game with scalbn(f) because it
is used internally
(more symbol renamings are necessary)

The weak_alias change for mc68881 is untested.

__STDC__ is always defined on NetBSD.

More trailing white space.

rcsid facism, WARNSify

Id -> NetBSD

LIBM_SCCS must be defined for the RCS ID to be defined.
This library will soon be used by DJGPP. And since memory is often tight
on DOS machines, there is little benifit to be had from including RCS IDs.

Change int -> int32_t and unsigned int -> u_int32_t to improve portabilty
to machines where int != 32 bits.

Float versions of math functions. From Ian Taylor (ian@cygnus.com), with
minor changes by me.