1 files changed, 4 insertions, 4 deletions

diff --git a/lopcodes.h b/lopcodes.h
index ca848835..be5bde30 100644
--- a/lopcodes.h
+++ b/lopcodes.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.106 2003/05/15 19:46:03 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.107 2004/04/30 20:13:38 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -41,10 +41,10 @@ enum OpMode {iABC, iABx, iAsBx};  /* basic instruction format */
 
 #define SIZE_OP         6
 
-#define POS_C           SIZE_OP
+#define POS_C           (POS_A + SIZE_A)
 #define POS_B           (POS_C + SIZE_C)
 #define POS_Bx          POS_C
-#define POS_A           (POS_B + SIZE_B)
+#define POS_A           SIZE_OP
 
 
 /*
@@ -79,7 +79,7 @@ enum OpMode {iABC, iABx, iAsBx};  /* basic instruction format */
 #define GET_OPCODE(i)   (cast(OpCode, (i)&MASK1(SIZE_OP,0)))
 #define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,0)) | cast(Instruction, o)))
 
-#define GETARG_A(i)     (cast(int, (i)>>POS_A))
+#define GETARG_A(i)     (cast(int, (i)>>POS_A) & MASK1(SIZE_A,0))
 #define SETARG_A(i,u)   ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \
                 ((cast(Instruction, u)<<POS_A)&MASK1(SIZE_A,POS_A))))