From 14e51eb727e127a8851ff9164cd4e33d0c6c3348 Mon Sep 17 00:00:00 2001 From: lkcl Date: Thu, 8 Jun 2023 05:46:00 +0100 Subject: [PATCH] --- openpower/sv/po9_encoding/discussion.mdwn | 29 ++++++++++++----------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/openpower/sv/po9_encoding/discussion.mdwn b/openpower/sv/po9_encoding/discussion.mdwn index 38ca9c2c7..55fa68d0a 100644 --- a/openpower/sv/po9_encoding/discussion.mdwn +++ b/openpower/sv/po9_encoding/discussion.mdwn @@ -46,21 +46,22 @@ Instruction allocation restrictions: # alternative 32-64 encoding (2) -the complexity of attempting to fit +the complexity of attempting to fit 32-bit instructions into +PO9 is very high. encoding (1) attempts to fit `setvl` etc. into +32-bit but it is very tight. ``` -|0-5| 6-27 28 29|30-31|32|33-35|36-37| 38-59 | 60-63 | Description | -|---|-----|-----|-----|--|-----|-----|-------|-------|------------------| -|PO9| rm0 | 0 0 | 0 0 | 0 000 rm1 | xxxx | 0000 | SVP64:EXT900 | -|PO9| rm0 | 0 0 | 0 0 | 1 000 rm1 | xxxx | 0000 | SSingle:EXT900 | -|PO9| xxx | x 0 | 0 0 | x !zero | xxxx | !zero | 55-bit RESERVED | -|PO9| xxx | x 0 | 0 0 | 32-bit EXT900 (Vectorizable) | -|PO9| xxx | 1 1 | 0 0 | 32-bit EXT901 (Unvectorizable) | -|PO9| !ZERO | 0 0 | 1 | DWi | SSingle:EXT232-263 | -|PO9| 0000 | 0 0 | 1 | DWi | Scalar EXT232-263 | -|PO9| nnnn | 1 0 | 1 | DWi | SVP64:EXT232-263 | -|PO9| 0000 | 0 1 | Defined Word-instruction | 32-bit Unvec in 64b| -|PO9| !ZERO | 0 1 | Defined Word-instruction | SSingle:EXT000-063 | -|PO9| nnnn | 1 1 | Defined Word-instruction | SVP64:EXT000-063 | +|0-5| 6-28|29 30 31|32|33-36|37 | 38-60 | 61-63 | Description | +|---|-----|--------|--|-----|---|-------|-------|------------------| +|PO9| rm0 | 0 0 0 | 0 0000 rm1| xxxx | 000 | SVP64:EXT900 | +|PO9| rm0 | 0 0 0 | 1 0000 rm1| xxxx | 000 | SSingle:EXT900 | +|PO9| xxx | 0 0 0 | x !zero | xxxx | !zero | 55-bit RESERVED | +|PO9| xxx | 1 0 0 | 32-bit EXT900 | +|PO9| !ZERO | 0 0 | 1 | DWi | SSingle:EXT232-263 | +|PO9| 0000 | 0 0 | 1 | DWi | Scalar EXT232-263 | +|PO9| nnnn | 1 0 | 1 | DWi | SVP64:EXT232-263 | +|PO9| 0000 | 0 1 | Defined Word-instruction | 32-bit Unvec in 64b| +|PO9| !ZERO | 0 1 | Defined Word-instruction | SSingle:EXT000-063 | +|PO9| nnnn | 1 1 | Defined Word-instruction | SVP64:EXT000-063 | ``` -- 2.30.2