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From: | Richard Henderson |
Subject: | Re: [PATCH 2/6] target/riscv: add support for unique fpr read/write with support for zfinx |
Date: | Sat, 25 Dec 2021 14:00:29 -0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 |
On 12/24/21 7:13 PM, liweiwei wrote:
In RV64 case, this should be nan-boxing value( upper bits are all ones). However, zfinx will not check nan-boxing of source, the upper 32 bits have no effect on the final result. So I think both zero-extended or sign-extended are OK.
There is no nanboxing in zfinx at all -- values are sign-extended. r~
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