From: lkcl <lkcl@web>
Date: Fri, 25 Dec 2020 21:48:36 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~883
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9647302b462d7f39feba2b0b3b0a7eb0a1a972c8;p=libreriscv.git

---

diff --git a/openpower/sv/bitmanip.mdwn b/openpower/sv/bitmanip.mdwn
index 47f407849..54958ba43 100644
--- a/openpower/sv/bitmanip.mdwn
+++ b/openpower/sv/bitmanip.mdwn
@@ -19,3 +19,20 @@ vpdepd VRT,VRA,VRB
 # vector bit extract
 
 other way round
+
+# single bit set
+
+```
+uint_xlen_t sbset(uint_xlen_t rs1, uint_xlen_t rs2) { int shamt = rs2 & (XLEN - 1);
+}
+return rs1 | (uint_xlen_t(1) << shamt);
+uint_xlen_t sbclr(uint_xlen_t rs1, uint_xlen_t rs2) { int shamt = rs2 & (XLEN - 1);
+}
+return rs1 & ~(uint_xlen_t(1) << shamt);
+uint_xlen_t sbinv(uint_xlen_t rs1, uint_xlen_t rs2) { int shamt = rs2 & (XLEN - 1);
+}
+return rs1 ^ (uint_xlen_t(1) << shamt);
+uint_xlen_t sbext(uint_xlen_t rs1, uint_xlen_t rs2) { int shamt = rs2 & (XLEN - 1);
+}
+return 1 & (rs1 >> shamt);
+```