From: lkcl <lkcl@web>
Date: Wed, 11 Sep 2019 13:24:21 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~4110
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a9b1cf63f84cb91176231a680c2cecaabea6cea7;p=libreriscv.git

---

diff --git a/zfpacc_proposal.mdwn b/zfpacc_proposal.mdwn
index 114963d0d..916a3fcf4 100644
--- a/zfpacc_proposal.mdwn
+++ b/zfpacc_proposal.mdwn
@@ -69,7 +69,16 @@ TODO: reduced accuracy
     sequences), while allowing portable code to execute discovery
     sequences to detect support for alternative accuracy modes.
 
-# Dynamic accuracy CSR
+# Dynamic accuracy CSR <a name="dynamic"></a>
+
+| 31....11 | 10..8  | 7..5 | 4....0 |
+| reserved | facc   | frm  | fflags |
+
+| facc  | mode    | description         | 
+| 0b000 | IEEE754 | correctly rounded   | 
+| 0b010 | ULP<1   | Unit Last Place < 1 | 
+| 0b100 | Vulkan  | Vulkan compliant    | 
+| 0b110 | Appx    | Machine Learning    | 
 
 maybe a solution would be to add an extra field to the fp control csr
 to allow selecting one of several accurate or fast modes: