Re: [PATCH v2 0/4] LoongArch: Add some floating-point operations

[Xi Ruoyao <xry111@xry111.site>]

On Wed, 2022-11-09 at 21:53 +0800, Xi Ruoyao wrote:
> These patches allow to expand the following builtins to floating point
> instructions for LoongArch:
> 
> - __builtin_rint{,f}
> - __builtin_{l,ll}rint{,f}
> - __builtin_{l,ll}floor{,f}
> - __builtin_{l,ll}ceil{,f}
> - __builtin_scalb{n,ln}{,f}
> - __builtin_logb{,f}
> 
> Bootstrapped and regtested on loongarch64-linux-gnu.  And a modified
> Glibc using the builtins for rint{,f}, {l,ll}rint{,f}, and logb{,f}
> also survived Glibc test suite.
> 
> Please review ASAP because GCC 13 stage 1 will end on Nov. 13th.
> 
> v1 -> v2: Only use ftint{rm,rp} instructions if floor and ceil are
> allowed to raise inexact exception.
> 
> Xi Ruoyao (4):
>   LoongArch: Rename frint_<fmt> to rint<mode>2
>   LoongArch: Add ftint{,rm,rp}.{w,l}.{s,d} instructions
>   LoongArch: Add fscaleb.{s,d} instructions as ldexp{sf,df}3
>   LoongArch: Add flogb.{s,d} instructions and expand logb{sf,df}2
> 
>  gcc/config/loongarch/loongarch.md             | 95
> ++++++++++++++++++-
>  gcc/testsuite/gcc.target/loongarch/flogb.c    | 18 ++++
>  gcc/testsuite/gcc.target/loongarch/frint.c    | 16 ++++
>  gcc/testsuite/gcc.target/loongarch/fscaleb.c  | 48 ++++++++++
>  .../gcc.target/loongarch/ftint-no-inexact.c   | 44 +++++++++
>  gcc/testsuite/gcc.target/loongarch/ftint.c    | 44 +++++++++
>  6 files changed, 261 insertions(+), 4 deletions(-)
>  create mode 100644 gcc/testsuite/gcc.target/loongarch/flogb.c
>  create mode 100644 gcc/testsuite/gcc.target/loongarch/frint.c
>  create mode 100644 gcc/testsuite/gcc.target/loongarch/fscaleb.c
>  create mode 100644 gcc/testsuite/gcc.target/loongarch/ftint-no-
> inexact.c
>  create mode 100644 gcc/testsuite/gcc.target/loongarch/ftint.c
> 

Pushed r13-3922.

I'll be busy in the following week.  Will do the work on Glibc side
after Nov. 20.

-- 
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University