From: lkcl Date: Sun, 21 Aug 2022 11:01:33 +0000 (+0100) Subject: (no commit message) X-Git-Tag: opf_rfc_ls005_v1~815 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d95f6f2dc81ee124a23d9cfcd7775c561f39f64d;p=libreriscv.git --- diff --git a/openpower/sv/ldst.mdwn b/openpower/sv/ldst.mdwn index b45cef665..0f65bd84c 100644 --- a/openpower/sv/ldst.mdwn +++ b/openpower/sv/ldst.mdwn @@ -77,7 +77,13 @@ an alternative table meaning for [[sv/svp64]] mode. The following modes make se More than that however it is necessary to fit the usual Vector ISA capabilities onto both Power ISA LD/ST with immediate and to -LD/ST Indexed. They present subtly different Mode tables. +LD/ST Indexed. They present subtly different Mode tables, which, due +to lack of space, have the following quirks: + +* LD/ST Immediate has no individual control over src/dest zeroing, + whereas LD/ST Indexed does. +* LD/ST Immediate has no Saturated Pack/Unpack (Arithmetic Mode does) +* LD/ST Indexed has no Pack/Unpack (REMAP may be used instead) # Format and fields