On Sat, Oct 16, 2021 at 1:05 AM Richard Henderson <richard.henderson@linaro.org
<mailto:richard.henderson@linaro.org>> wrote:
On 10/14/21 11:54 PM, frank.chang@sifive.com
<mailto:frank.chang@sifive.com> wrote:
> From: Chih-Min Chao<chihmin.chao@sifive.com
<mailto:chihmin.chao@sifive.com>>
>
> The sNaN propagation behavior has been changed since
> cd20cee7 inhttps://github.com/riscv/riscv-isa-manual
<http://github.com/riscv/riscv-isa-manual>
>
> Signed-off-by: Chih-Min Chao<chihmin.chao@sifive.com
<mailto:chihmin.chao@sifive.com>>
> ---
> target/riscv/fpu_helper.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/target/riscv/fpu_helper.c b/target/riscv/fpu_helper.c
> index 8700516a14c..1472ead2528 100644
> --- a/target/riscv/fpu_helper.c
> +++ b/target/riscv/fpu_helper.c
> @@ -174,14 +174,14 @@ uint64_t helper_fmin_s(CPURISCVState *env,
uint64_t rs1,
uint64_t rs2)
> {
> float32 frs1 = check_nanbox_s(rs1);
> float32 frs2 = check_nanbox_s(rs2);
> - return nanbox_s(float32_minnum(frs1, frs2, &env->fp_status));
> + return nanbox_s(float32_minnum_noprop(frs1, frs2, &env->fp_status));
> }
Don't you need to conditionalize behaviour on the isa revision?
I will pick the right API based on CPU privilege spec version.