Re: [PATCH v2 00/10] softfloat: Implement float128_muladd

[Richard Henderson]

Ping.

On 9/25/20 8:20 AM, Richard Henderson wrote:
> Plus assorted cleanups, passes tests/fp/fp-test.
> 
> Changes in v2:
>   * Add UInt256 type (david)
>   * Rewrite and inline shift256RightJamming.  This keeps the whole
>     UInt256 in registers, avoiding long sequences of loads and stores.
>   * Add x86_64 assembly for double shifts.  I don't know why the
>     compiler can't recognize this pattern, but swapping values in
>     and out of %cl (the only register in the base isa that can
>     hold a variable shift) is really ugly.
>   * Add ppc64 assembly.
> 
> 
> r~
> 
> 
> Richard Henderson (10):
>   softfloat: Use mulu64 for mul64To128
>   softfloat: Use int128.h for some operations
>   softfloat: Tidy a * b + inf return
>   softfloat: Add float_cmask and constants
>   softfloat: Inline pick_nan_muladd into its caller
>   softfloat: Implement float128_muladd
>   softfloat: Use x86_64 assembly for {add,sub}{192,256}
>   softfloat: Use x86_64 assembly for sh[rl]_double
>   softfloat: Use aarch64 assembly for {add,sub}{192,256}
>   softfloat: Use ppc64 assembly for {add,sub}{192,256}
> 
>  include/fpu/softfloat-macros.h | 109 +++---
>  include/fpu/softfloat.h        |   2 +
>  fpu/softfloat.c                | 620 ++++++++++++++++++++++++++++++---
>  tests/fp/fp-test.c             |   2 +-
>  tests/fp/wrap.c.inc            |  12 +
>  5 files changed, 652 insertions(+), 93 deletions(-)
>