[PATCH v2 00/10] LoongArch: Use builtins with GCC >= 13

[Xiaolin Tang]

Patch 0001-0007:
GCC 13, LoongArch support builtins for {,l,ll}rint, logb,
use these built-ins instead of generic function implementation.

Patch 0008:
GCC 13, LoongArch support ___builtin_scalbn{,f} with -fno-math-errno,
but only "libm" can use -fno-math-errno in GLIBC, and scalbn is in 
libc instead of libm because __printf_fp calls it. So inline assembler
of the scalbn functions is a better choice for LoongArch.

Patch 0009: Add LoongArch support for scalb[f].


>From v1 to v2:
Add patch 0010: Add LoongArch support for ilogb[f].


Discuss with Xi Ruoyao<xry111@xry111.site>
Link:
https://sourceware.org/pipermail/libc-alpha/2022-November/143425.html

Xi Ruoyao (1):
  LoongArch: Use __builtin_rint{,f} with GCC >= 13

Xiaolin Tang (9):
  Use GCC builtins for lrint functions if desired.
  LoongArch: Use __builtin_lrint{,f} with GCC >= 13
  Use GCC builtins for llrint functions if desired.
  LoongArch: Use __builtin_llrint{,f} with GCC >= 13
  Use GCC builtins for logb functions if desired.
  LoongArch: Use __builtin_logb{,f} with GCC >= 13
  LoongArch: Add support for scalbn[f]
  LoongArch: Add support for scalb[f]
  LoongArch: Add support for ilogb[f]

 sysdeps/generic/math-use-builtins-llrint.h    |  4 ++
 sysdeps/generic/math-use-builtins-logb.h      |  4 ++
 sysdeps/generic/math-use-builtins-lrint.h     |  4 ++
 sysdeps/generic/math-use-builtins.h           |  3 +
 sysdeps/ieee754/dbl-64/s_llrint.c             | 18 ++++--
 sysdeps/ieee754/dbl-64/s_logb.c               |  5 ++
 sysdeps/ieee754/dbl-64/s_lrint.c              | 18 ++++--
 sysdeps/ieee754/float128/float128_private.h   |  6 ++
 sysdeps/ieee754/flt-32/s_llrintf.c            | 18 ++++--
 sysdeps/ieee754/flt-32/s_logbf.c              |  5 ++
 sysdeps/ieee754/flt-32/s_lrintf.c             | 18 ++++--
 sysdeps/ieee754/ldbl-128/s_llrintl.c          | 17 ++++--
 sysdeps/ieee754/ldbl-128/s_logbl.c            |  6 ++
 sysdeps/ieee754/ldbl-128/s_lrintl.c           | 17 ++++--
 sysdeps/loongarch/fpu/e_ilogb.c               | 39 ++++++++++++
 sysdeps/loongarch/fpu/e_ilogbf.c              | 39 ++++++++++++
 sysdeps/loongarch/fpu/e_scalb.c               | 60 +++++++++++++++++++
 sysdeps/loongarch/fpu/e_scalbf.c              | 60 +++++++++++++++++++
 .../loongarch/fpu/math-use-builtins-llrint.h  | 10 ++++
 .../loongarch/fpu/math-use-builtins-logb.h    | 10 ++++
 .../loongarch/fpu/math-use-builtins-lrint.h   | 10 ++++
 .../loongarch/fpu/math-use-builtins-rint.h    |  9 +++
 sysdeps/loongarch/fpu/s_scalbn.c              | 29 +++++++++
 sysdeps/loongarch/fpu/s_scalbnf.c             | 29 +++++++++
 24 files changed, 404 insertions(+), 34 deletions(-)
 create mode 100644 sysdeps/generic/math-use-builtins-llrint.h
 create mode 100644 sysdeps/generic/math-use-builtins-logb.h
 create mode 100644 sysdeps/generic/math-use-builtins-lrint.h
 create mode 100644 sysdeps/loongarch/fpu/e_ilogb.c
 create mode 100644 sysdeps/loongarch/fpu/e_ilogbf.c
 create mode 100644 sysdeps/loongarch/fpu/e_scalb.c
 create mode 100644 sysdeps/loongarch/fpu/e_scalbf.c
 create mode 100644 sysdeps/loongarch/fpu/math-use-builtins-llrint.h
 create mode 100644 sysdeps/loongarch/fpu/math-use-builtins-logb.h
 create mode 100644 sysdeps/loongarch/fpu/math-use-builtins-lrint.h
 create mode 100644 sysdeps/loongarch/fpu/math-use-builtins-rint.h
 create mode 100644 sysdeps/loongarch/fpu/s_scalbn.c
 create mode 100644 sysdeps/loongarch/fpu/s_scalbnf.c

-- 
2.31.1