started the emulation framework

[palacios.git] / palacios / src / palacios / vmm_decoder.c

diff --git a/palacios/src/palacios/vmm_decoder.c b/palacios/src/palacios/vmm_decoder.c
index 6d1299a..10fb2dc 100644 (file)
--- a/palacios/src/palacios/vmm_decoder.c
+++ b/palacios/src/palacios/vmm_decoder.c
@@ -8,3 +8,23 @@ int opcode_cmp(const uchar_t * op1, const uchar_t * op2) {
     return memcmp(op1 + 1, op2 + 1, op1[0]);
   }
 }
+
+
+void strip_rep_prefix(uchar_t * instr, int length) {
+  int read_ctr = 0;
+  int write_ctr = 0;
+  int found = 0;
+
+  while (read_ctr < length) {
+    if ((!found) && 
+       ( (instr[read_ctr] == 0xF2) ||
+         (instr[read_ctr] == 0xF3))) {
+      read_ctr++;
+      found = 1;
+    } else {
+      instr[write_ctr] = instr[read_ctr];
+      write_ctr++;
+      read_ctr++;
+    }
+  }
+}