On 2022/9/19 19:45, gaosong wrote:
在 2022/9/17 下午6:12, Richard Henderson 写道:
On 9/17/22 11:12, gaosong wrote:
在 2022/9/17 下午4:59, Qi Hu 写道:
On 2022/9/17 15:59, Song Gao wrote:
div.d, div.du, div,w, div.wu, the LoongArch host if x/0 the
result is 0.
The message has a typo: "div,w" => "div.w"
Also I don't know why we need to do this, since the manual say:
"When the divisor is 0, the result can be any value".
I tested on LoongArch host, the result is always 0.
But it is legal for a different loongarch host implementation to
return some other value. Therefore the test itself is not correct.
I think the manual maybe not correct, the hardware engineer said that
they need to comfirm whether the result is always 0.
Thanks.
Song Gao
Hi,
The hardware designers suggested that 0 should not be used as the
default value when "div 0" occurs. The behavior is not guaranteed in
future processors.
So I think there are some ways to solve this:
- Remove this case("div 0") from risu test.
- Keep this patch by yourself. If you want to do risu test, patch it. :-)
regards,
Qi
r~
