[RFC,0/8] Implement blfoat16 in softfloat

Message

LIU Zhiwei July 12, 2020, 11:45 p.m. UTC

As bfloat16 is more and more popular in many archs, implement bfloat16
interfaces in softfloat, so that archs can add their bfloat16 insns
based on the blfoat16 interfaces here.

This patch set is more copy of float16 than really define new
interfaces or implementations.

Any thoughts are welcomed!

LIU Zhiwei (8):
  fpu/softfloat: fix up float16 nan recognition
  fpu/softfloat: use the similiar logic to recognize sNaN and qNaN
  fpu/softfloat: add FloatFmt for bfloat16
  fpu/softfloat: add pack and unpack interfaces for bfloat16
  fpu/softfloat: define brain floating-point types
  fpu/softfloat: define operation for bfloat16
  fpu/softfloat: define covert operation for bfloat16
  fpu/softfloat: define misc operation for bfloat16

 fpu/softfloat-specialize.inc.c |  50 ++++-
 fpu/softfloat.c                | 393 ++++++++++++++++++++++++++++++++-
 include/fpu/softfloat-types.h  |   8 +
 include/fpu/softfloat.h        | 133 +++++++++++
 4 files changed, 577 insertions(+), 7 deletions(-)