From: Frank Chang <frank.ch...@sifive.com>
In IEEE 754-2019, minNum, maxNum, minNumMag and maxNumMag are removed
and replaced with minimum, minimumNumber, maximum and maximumNumber.
minimumNumber/maximumNumber behavior for SNaN is changed to:
* If both operands are NaNs, a QNaN is returned.
* If either operand is a SNaN, an invalid operation exception is signaled,
but unless both operands are NaNs, the SNaN is otherwise ignored and
not converted to a QNaN.
This patchset add support of the above alternative sNaN propagation for
fmax/fmin, which is required by RISC-V floating-point v2.2.
Changelog:
v2:
* Change API names from *_noprop() to *_maximum_number()
and *_minimum_number().
* Pick softfloat min/max APIs based on CPU privilege spec version.
Chih-Min Chao (2):
softfloat: add APIs to handle alternative sNaN propagation for
fmax/fmin
target/riscv: change the api for RVF/RVD fmin/fmax
fpu/softfloat-parts.c.inc | 25 +++++++++++++++++++++++--
fpu/softfloat.c | 19 +++++++++++++------
include/fpu/softfloat.h | 10 ++++++++++
target/riscv/fpu_helper.c | 16 ++++++++++++----
4 files changed, 58 insertions(+), 12 deletions(-)
--
2.25.1
