Re: [RFC PATCH 2/2] tests/tcg/mips64el: Run float tests

[Jiaxun Yang]

在2021年12月26日十二月 上午12:19，Philippe Mathieu-Daudé写道：
> Unfortunately this fails:
>
>   $ make run-tcg-tests-mips64el-linux-user
>   ...
>   Files float_convs.out and tests/tcg/mips64el/float_convs.ref differ
>   --- float_convs.out     2021-12-26 01:03:48.585973637 +0100
>   +++ tests/tcg/mips64el/float_convs.ref   2021-12-26 00:29:35.804465340 +0100
>   @@ -1,40 +1,40 @@
>    ### Rounding to nearest
>   -from single: f32(nan:0xffffffff)
>   -  to double: f64(nan:0x007ff7ffffffffffff) (INVALID)
>   -   to int32: 2147483647 (INVALID)
>   -   to int64: 9223372036854775807 (INVALID)
>   -  to uint32: 2147483647 (INVALID)
>   -  to uint64: 9223372036854775807 (INVALID)
>   make[2]: *** [tests/tcg/multiarch/Makefile.target:32: run-float_convs] 
> Error 1
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  tests/tcg/mips64el/Makefile.target | 2 ++
>  1 file changed, 2 insertions(+)
>  create mode 100644 tests/tcg/mips64el/Makefile.target
>
> diff --git a/tests/tcg/mips64el/Makefile.target 
> b/tests/tcg/mips64el/Makefile.target
> new file mode 100644
> index 00000000000..dcb1e9d72ac
> --- /dev/null
> +++ b/tests/tcg/mips64el/Makefile.target
> @@ -0,0 +1,2 @@
> +float_%: CFLAGS+=-march=loongson3a
> +float_%: QEMU_OPTS+=-cpu Loongson-3A4000

Hmm, -march=loongson3a assumed legacy NaN while our -cpu Loongson-3A4000 
assumed IEEE 754-2008 style NaN.

I guess switch to Loongson-3A1000 can help?

Thanks.

> -- 
> 2.33.1

-- 
- Jiaxun