From: lkcl <lkcl@web>
Date: Sat, 24 Sep 2022 23:50:46 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~302
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d66ea33c5bab5c337c594cb19d5cf170642aafb8;p=libreriscv.git

---

diff --git a/openpower/sv/overview/discussion.mdwn b/openpower/sv/overview/discussion.mdwn
index 51e0d8c6a..9424dd5ca 100644
--- a/openpower/sv/overview/discussion.mdwn
+++ b/openpower/sv/overview/discussion.mdwn
@@ -248,10 +248,17 @@ then the following bits are set (all others zero):
 Now taking the c struct definition `elreg_t` above we may provide
 a link between the two:
 
-    elreg_t x;
+    elreg_t x = RA;
     x.actual_bytes[0] = RA.B7; // byte zero in LE is byte 7 in MSB0
     x.actual_bytes[1] = RA.B6;
     ...
     x.actual_bytes[7] = RA.B0; // byte 7 in LE is byte 0 in MSB0
     
-    
+The following **arithmetic** operations - in c - produce the exact
+same results as above:
+
+    elreg_t x = RA, y = RB, z = RT;
+    x.l[0] = 1 << 63;
+    y.l[0] = 128;
+    z.l[0] = 3 + 4;
+