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+
+
+x86 BZHI semantic bug
+Description of problem:
+The result of instruction BZHI is different from the CPU. The value of destination register and SF of EFLAGS are different.
+Steps to reproduce:
+1. Compile this code
+```
+void main() {
+    asm("mov rax, 0xb1aa9da2fe33fe3");
+    asm("mov rbx, 0x80000000ffffffff");
+    asm("mov rcx, 0xf3fce8829b99a5c6");
+    asm("bzhi rax, rbx, rcx");
+}
+```
+2. Execute and compare the result with the CPU.
+    - CPU
+        - RAX = 0x0x80000000ffffffff
+        - SF = 1
+    - QEMU
+        - RAX = 0xffffffff
+        - SF = 0
+Additional information:
+This bug is discovered by research conducted by KAIST SoftSec.