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-rw-r--r--sys/src/libdtracy/prog.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/libdtracy/prog.c b/sys/src/libdtracy/prog.c
index d2b14c509..2c294068b 100644
--- a/sys/src/libdtracy/prog.c
+++ b/sys/src/libdtracy/prog.c
@@ -138,7 +138,7 @@ dteexec(DTExpr *p, ExecInfo *info, s64int *retv)
case DTE_XOR: R[c] = R[a] ^ R[b]; break;
case DTE_XNOR: R[c] = ~(R[a] ^ R[b]); break;
case DTE_LDI: R[c] = (s64int)ins << 40 >> 54 << (ins >> 8 & 63); break;
- case DTE_XORI: R[c] |= (s64int)ins << 40 >> 54 << (ins >> 8 & 63); break;
+ case DTE_XORI: R[c] ^= (s64int)ins << 40 >> 54 << (ins >> 8 & 63); break;
case DTE_LSL:
if((u64int)R[b] >= 64)
R[c] = 0;