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diff --git a/openpower/sv/bitmanip.mdwn b/openpower/sv/bitmanip.mdwn
index 3b8ee8bf74ee6aa35ec9e2d4566c22104dbe0fc0..688dede42da91091ff791e48d1b51674d3a9c77e 100644 (file)
--- a/openpower/sv/bitmanip.mdwn
+++ b/openpower/sv/bitmanip.mdwn
@@ -245,11 +245,13 @@ Replaces a pair of explicit instructions in hot-loops.
 
 ```
 uint_xlen_t shadd(uint_xlen_t rs1, uint_xlen_t rs2, uint8_t sh) {
+    sh = sh & 0x3;
     return (rs1 << (sh+1)) + rs2;
 }
 
 uint_xlen_t shadduw(uint_xlen_t rs1, uint_xlen_t rs2, uint8_t sh) {
     uint_xlen_t rs1z = rs1 & 0xFFFFFFFF;
+    sh = sh & 0x3;
     return (rs1z << (sh+1)) + rs2;
 }
 ```