[PATCH v2 00/10] softfloat: Implement float128_muladd

[Richard Henderson]

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(-)

-- 
2.25.1