From: lkcl <lkcl@web>
Date: Sun, 30 Jun 2019 08:28:46 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~4327
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bd6a14fd736714da242adac89d0e3de242994260;p=libreriscv.git

---

diff --git a/simple_v_extension/specification/sv.setvl.mdwn b/simple_v_extension/specification/sv.setvl.mdwn
index 8ad496b25..359d3e454 100644
--- a/simple_v_extension/specification/sv.setvl.mdwn
+++ b/simple_v_extension/specification/sv.setvl.mdwn
@@ -112,6 +112,18 @@ It leaves space for future expansion to RV128 and/or multi-register predicates.
         regs[rd] = vl
     }
 
+# questions
+
+<https://libre-riscv.org/simple_v_extension/appendix/#strncpy>
+
+GETVL add1 SETVL is a pain. 3 operations because VL is a CSR it is not possible to perform arithmetic on it.
+
+What about actually marking one of the registers *as* VL?
+
+----
+
+Setting VL from an immed without altering MVL is not possible in the above pseudocode. It is covered by VLtyp and the VL block in VBLOCK, however is that enough?
+
 # links
 
 * <http://lists.libre-riscv.org/pipermail/libre-riscv-dev/2019-June/001881.html>