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| author | Chih-Min Chao | 2021-10-21 18:08:46 +0200 |
|---|---|---|
| committer | Alistair Francis | 2021-10-29 08:56:12 +0200 |
| commit | 15161e425ee1bb1180f9cec574cda44fb10c0931 (patch) | |
| tree | 9c90b47ae53fcb338a122b1590b6c316e4074410 /hw/timer/sh_timer.c | |
| parent | softfloat: add APIs to handle alternative sNaN propagation for fmax/fmin (diff) | |
| download | qemu-15161e425ee1bb1180f9cec574cda44fb10c0931.tar.gz qemu-15161e425ee1bb1180f9cec574cda44fb10c0931.tar.xz qemu-15161e425ee1bb1180f9cec574cda44fb10c0931.zip | |
target/riscv: change the api for RVF/RVD fmin/fmax
The sNaN propagation behavior has been changed since cd20cee7 in
https://github.com/riscv/riscv-isa-manual.
In Priv spec v1.10, RVF is v2.0. fmin.s and fmax.s are implemented with
IEEE 754-2008 minNum and maxNum operations.
In Priv spec v1.11, RVF is v2.2. fmin.s and fmax.s are amended to
implement IEEE 754-2019 minimumNumber and maximumNumber operations.
Therefore, to prevent the risk of having too many version variables.
Instead of introducing an extra *fext_ver* variable, we tie RVF version
to Priv version. Though it's not completely accurate but is close enough.
Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211021160847.2748577-3-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'hw/timer/sh_timer.c')
0 files changed, 0 insertions, 0 deletions