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-rw-r--r--include/opcode/i386.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/include/opcode/i386.h b/include/opcode/i386.h
index ad6d3c6755..b635334e41 100644
--- a/include/opcode/i386.h
+++ b/include/opcode/i386.h
@@ -76,8 +76,6 @@
#define SS_PREFIX_OPCODE 0x36
#define REPNE_PREFIX_OPCODE 0xf2
#define REPE_PREFIX_OPCODE 0xf3
-#define XACQUIRE_PREFIX_OPCODE 0xf2
-#define XRELEASE_PREFIX_OPCODE 0xf3
#define TWO_BYTE_OPCODE_ESCAPE 0x0f
#define NOP_OPCODE (char) 0x90