From: lkcl <lkcl@web>
Date: Thu, 23 Jan 2020 09:29:42 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~3781
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=60b99f38145c607412677f63c7ebed62264db855;p=libreriscv.git

---

diff --git a/openpower.mdwn b/openpower.mdwn
index e1f717826..a19799610 100644
--- a/openpower.mdwn
+++ b/openpower.mdwn
@@ -21,6 +21,8 @@ Doesn't exist in Power, need to work out suitable opcodes, basically means dupli
 
 Usually done with a fmt field, 2 bit, last one is FP128
 
+idea: rather than add dozens of new opcodes, add "repurposer" instructions that remap FP32 to 16/32/64/128 and FP64 likewise.  can also be done as C instruction, only needs 4 bits to specify.
+
 # Escape Sequencing
 
 Absolutely critical, also to have official endorsement from OpenPower Foundation.