From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 30 Sep 2019 16:04:13 +0000 (+0100)
Subject: add missing bitmanip opcodes
X-Git-Tag: convert-csv-opcode-to-binary~3932
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=65b14682f7f2dc20cd041981642a0836c17137b5;p=libreriscv.git

add missing bitmanip opcodes
---

diff --git a/simple_v_extension/specification/bitmanip.mdwn b/simple_v_extension/specification/bitmanip.mdwn
index bc52fb763..25acef469 100644
--- a/simple_v_extension/specification/bitmanip.mdwn
+++ b/simple_v_extension/specification/bitmanip.mdwn
@@ -127,3 +127,41 @@ Pseudo-code:
                 if (regs[rs2] & bit):
                     setting_mode = True # back into "setting" mode
             i += 1
+
+## sif - set including first bit
+
+     # Example
+
+     7 6 5 4 3 2 1 0   Element number
+
+     1 0 0 1 0 1 0 0   a3 contents
+                       sif a2, a3
+     0 0 0 0 0 1 1 1   a2 contents
+
+     1 0 0 1 0 1 0 1   a3 contents
+                       sif a2, a3
+     0 0 0 0 0 0 0 1   a2
+
+     1 1 0 0 0 0 1 1   a0 vcontents
+     1 0 0 1 0 1 0 0   a3 contents
+                       sif a2, a3, a0
+     1 1 x x x x 1 1   a2 contents
+
+## sof - set only first bit
+
+     # Example
+
+     7 6 5 4 3 2 1 0   Element number
+
+     1 0 0 1 0 1 0 0   a3 contents
+                       sof a2, a3
+     0 0 0 0 0 1 0 0   a2 contents
+
+     1 0 0 1 0 1 0 1   a3 contents
+                       sof a2, a3
+     0 0 0 0 0 0 0 1   a2
+
+     1 1 0 0 0 0 1 1   a0 vcontents
+     1 1 0 1 0 1 0 0   a3 contents
+                       sof a2, a3, a0
+     0 1 x x x x 0 0   a2 contents