From: lkcl Date: Sat, 19 Dec 2020 19:15:34 +0000 (+0000) Subject: (no commit message) X-Git-Tag: convert-csv-opcode-to-binary~1170 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=00aa4a54e55a0db176c6cd9285f5590244c0dadd;p=libreriscv.git --- diff --git a/openpower/sv/svp_rewrite/svp64.mdwn b/openpower/sv/svp_rewrite/svp64.mdwn index 5ea46f89c..f6d1bf166 100644 --- a/openpower/sv/svp_rewrite/svp64.mdwn +++ b/openpower/sv/svp_rewrite/svp64.mdwn @@ -14,9 +14,11 @@ and counting up as you move to the LSB end). All bit ranges are inclusive 64-bit instructions are split into two 32-bit words, the prefix and the suffix. The prefix always comes before the suffix in PC order. +# Identity Behaviour + SVP64 is designed so that when the prefix is all zeros, no effect or influence occurs (no augmentation) such that all standard OpenPOWER -v3.0/1B instructions are "unaltered". This is termed `scalar identity behaviour` (based on the mathematical definition for "identity", as in, "identity matrix") +v3.0/1B instructions are "unaltered". This is termed `scalar identity behaviour` (based on the mathematical definition for "identity", as in, "identity matrix" or better "identity transformation") # Definition of Reserved in this spec.