added copyright tags

[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 a414691..e859ee5 100644 (file)
--- a/palacios/src/palacios/vmm_decoder.c
+++ b/palacios/src/palacios/vmm_decoder.c
@@ -1,34 +1,33 @@
-#include <palacios/vmm_decoder.h>
-
-
+/* Northwestern University */
+/* (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> */
 
-/* The full blown instruction parser... */
-int v3_parse_instr(struct guest_info * info,
-                  char * instr_ptr,
-                  uint_t * instr_length, 
-                  struct x86_operand * src_operand,
-                  struct x86_operand * dst_operand,
-                  struct x86_operand * extra_operand) {
+#include <palacios/vmm_decoder.h>
 
-  V3_ASSERT(src_operand != NULL);
-  V3_ASSERT(dst_operand != NULL);
-  V3_ASSERT(extra_operand != NULL);
-  V3_ASSERT(instr_length != NULL);
-  V3_ASSERT(info != NULL);
 
-  
-  // Ignore prefixes for now
-  while (is_prefix_byte(*instr_ptr)) {
-    instr_ptr++;
-    *instr_length++;
+int opcode_cmp(const uchar_t * op1, const uchar_t * op2) {
+  if (op1[0] != op2[0]) {
+    return op1[0] - op2[0];;
+  } else {
+    return memcmp(op1 + 1, op2 + 1, op1[0]);
   }
+}
 
 
-  // Opcode table lookup, see xen/kvm
-
-
-
-
-
-  return 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++;
+    }
+  }
 }