From 792f360d86420668221a0245ac741dc7a6d97f78 Mon Sep 17 00:00:00 2001 From: lkcl Date: Fri, 31 Mar 2023 05:59:45 +0100 Subject: [PATCH] --- openpower/sv/rfc/ls010.mdwn | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/openpower/sv/rfc/ls010.mdwn b/openpower/sv/rfc/ls010.mdwn index 0e051d834..ff992e4f9 100644 --- a/openpower/sv/rfc/ls010.mdwn +++ b/openpower/sv/rfc/ls010.mdwn @@ -310,13 +310,17 @@ new 64-bit encoding space, alongside EXT1xx. | PO | 1 | 0 | !zero | n | SVP64Single:EXT000-063 or `RESERVED4` | | PO | 1 | 1 | nnnn | n | SVP64:EXT000-063 | -Note that for the future SVP64Single Encoding (currently RESERVED) it +Note that for the future SVP64Single Encoding (currently RESERVED3 and 4) it is prohibited to have bits 8-31 be zero, unlike for SVP64 Vector space, for which bits 8-31 can be zero (termed `scalar identity behaviour`). This prohibition allows SVP64Single to share its Encoding space with Scalar Ext232-263 and Scalar EXT300-363. +Also that RESERVED1 and 2 are given *tentative* naming EXT200-231 and +EXT300-363 respectively, in reality they are completely unused and +future use may allocate entirely different naming. + *Architectural Resource Allocation Note: **under no circumstances** must different Defined Words be allocated within any `EXT{z}` prefixed or unprefixed space for a given value of `z`. Even if UnVectoriseable @@ -333,15 +337,14 @@ Ecoding spaces and their potential are illustrated: | Encoding | Available bits | Scalar | Vectoriseable | SVP64Single | |----------|----------------|--------|---------------|--------------| |EXT000-063| 32 | yes | yes |yes | -|EXT100-163| 64 | yes | no |no | +|EXT100-163| 64 (?) | yes | no |no | |EXT200-231| 56 | N/A |not applicable |not applicable| |EXT232-263| 32 | yes | yes |yes | |EXT300-363| 32 | yes | no |no | Prefixed-Prefixed (96-bit) instructions are prohibited. EXT200-231 presently remains unallocated (RESERVED) and therefore its potential is not yet defined -(Not Applicable). Additional Sandbox Opcodes are defined as EXT254 and EXT322, -alongside EXT022. +(Not Applicable). # Remapped Encoding (`RM[0:23]`) -- 2.30.2