add notes about elwidth

diff --git a/simple_v_extension/specification.mdwn b/simple_v_extension/specification.mdwn
index 7f59620639761b6808400ab8775cdbb1e518198e..90148f0fb4a96a6af95d520abc739d6c09d552d1 100644 (file)
--- a/simple_v_extension/specification.mdwn
+++ b/simple_v_extension/specification.mdwn
@@ -1648,3 +1648,10 @@ info register,
 
 answer: they're not vectorised, so not a problem
 
+----
+
+* if opcode is in the RV32 group, rd, rs1 and rs2 bitwidth are
+  XLEN if elwidth==default
+* if opcode is in the RV32I group, rd, rs1 and rs2 bitwidth are
+  *32* if elwidth == default
+