[Bug 235413] [LIBM] optizimation for cexp and cexpf

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235413

--- Comment #4 from Steve Kargl <kargl at FreeBSD.org> ---
New commit log for cexpl_new.diff.

* include/complex.h:
  . Prototype for cexpl().

* lib/msun/Makefile:
  . Add s_cexpl.c to the build.
  . Add MLINK for cexpl.3 to cexp.3

* lib/msun/Symbol.map:
  . Add a new section for FreeBSD 13 symbols.
  . Add cexpl to the symbol table.

* lib/msun/src/math_private.h:
  . Change ENTERI() to toggle FPU precision for ld80 long double.
  . Introduce LEAVEI() to toggles FPU precision back to double.
  . Update RETURNI(x) to use __typeof(x) to set return type, use
    LEAVEI(), and use RETURNF(x) for the actual return.
  . Add prototype for __ldexp_expl();

* lib/msun/man/cexp.3:
  . Document cexpl().

* lib/msun/src/k_exp.c:
* lib/msun/src/k_expf.c:
  . Add declarations for c and s, and sort.
  . Use sincos[f]() instead of a call to sin[f]() and a call cos[f]().

* lib/msun/src/s_cexp.c:
  . Include float.h to get access to LDBL_MANT_DIG.
  . Add declarations for c and s, and sort.
  . Use sincos() instead of a call to sin() and a call cos().
  . Use __weak_reference(cexp, cexpl) on LDBL_MANT_DIG == 53.

* lib/msun/src/s_cexpf.c:
  . Add declarations for c and s, and sort.
  . Use sincosf() instead of a call to sinf() and a call cosf().

* lib/msun/ld80/k_cexpl.c:
  . Implementations of __frexp_expl(), __ldexp_expl(),  and __ldexp_cexpl(),
    which are computation kernels used by cexpl().

* lib/msun/ld80/k_expl.h:
  . Add 'L' suffix to a long double literal constant.
  . Fix typo in computation of scale2.
  . Use sincosl() instead of a call to sinl() and a call cosl().

* lib/msun/ld80/s_cexpl.c:
  . Implementation of cexpl() for ld80 hardware.

* lib/msun/ld128/k_cexpl.c:
  . Stub for __frexp_expl(), __ldexp_expl(), and __ldexp_cexpl().

* lib/msun/ld128/k_expl.h:
  . Add 'L' suffix to a long double literal constant.
  . Fix typo in computation of scale2.
  . Use sincosl() instead of a call to sinl() and a call cosl().

* lib/msun/ld128/s_cexpl.c:
  . Naive, but better than some might know, implementation of cexpl()
    for 113-bit long double hardware.

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