little fixes to vm and endianess

common/int.go

@@ -22,10 +22,18 @@ func (p Uint64Slice) Search(x uint64) int { return SearchUint64s(p, x) }
 
 //-----------------------------------------------------------------------------
 
-func PutUint64(dest []byte, i uint64) {
+func PutUint64LE(dest []byte, i uint64) {
 	binary.LittleEndian.PutUint64(dest, i)
 }
 
-func GetUint64(src []byte) uint64 {
+func GetUint64LE(src []byte) uint64 {
 	return binary.LittleEndian.Uint64(src)
 }
+
+func PutUint64BE(dest []byte, i uint64) {
+	binary.BigEndian.PutUint64(dest, i)
+}
+
+func GetUint64BE(src []byte) uint64 {
+	return binary.BigEndian.Uint64(src)
+}

common/word.go

@@ -2,7 +2,6 @@ package common
 
 import (
 	"bytes"
-	"encoding/binary"
 	"sort"
 )
 
@@ -30,12 +29,9 @@ func (w Word256) Compare(other Word256) int {
 }
 
 func Uint64ToWord256(i uint64) Word256 {
-	word := Word256{}
 	buf := [8]byte{}
-	PutUint64(buf[:], i)
-	word[24], word[25], word[26], word[27] = buf[7], buf[6], buf[5], buf[4]
-	word[28], word[29], word[30], word[31] = buf[3], buf[2], buf[1], buf[0]
-	return word
+	PutUint64BE(buf[:], i)
+	return LeftPadWord256(buf[:])
 }
 
 func RightPadWord256(bz []byte) (word Word256) {
@@ -49,10 +45,8 @@ func LeftPadWord256(bz []byte) (word Word256) {
 }
 
 func Uint64FromWord256(word Word256) uint64 {
-	buf := [8]byte{}
-	buf[0], buf[1], buf[2], buf[3] = word[31], word[30], word[29], word[28]
-	buf[4], buf[5], buf[6], buf[7] = word[27], word[26], word[25], word[24]
-	return binary.LittleEndian.Uint64(buf[:])
+	buf := word.Postfix(8)
+	return GetUint64BE(buf)
 }
 
 //-------------------------------------

state/tx_cache.go

@@ -147,7 +147,7 @@ func (cache *TxCache) AddLog(log *vm.Log) {
 func NewContractAddress(caller []byte, nonce uint64) []byte {
 	temp := make([]byte, 32+8)
 	copy(temp, caller)
-	PutUint64(temp[32:], nonce)
+	PutUint64LE(temp[32:], nonce)
 	return sha3.Sha3(temp)[:20]
 }
 

vm/stack.go

@@ -106,11 +106,13 @@ func (st *Stack) Peek() Word256 {
 	return st.data[st.ptr-1]
 }
 
-func (st *Stack) Print() {
+func (st *Stack) Print(n int) {
 	fmt.Println("### stack ###")
 	if st.ptr > 0 {
-		for i, val := range st.data {
-			fmt.Printf("%-3d  %v\n", i, val)
+		nn := MinInt(n, st.ptr)
+		for j, i := 0, st.ptr-1; i > st.ptr-1-nn; i-- {
+			fmt.Printf("%-3d  %X\n", j, st.data[i])
+			j += 1
 		}
 	} else {
 		fmt.Println("-- empty --")

vm/test/fake_app_state.go

@@ -89,6 +89,6 @@ func createAddress(creator *Account) Word256 {
 	creator.Nonce += 1
 	temp := make([]byte, 32+8)
 	copy(temp, creator.Address[:])
-	PutUint64(temp[32:], nonce)
+	PutUint64LE(temp[32:], nonce)
 	return LeftPadWord256(sha3.Sha3(temp)[:20])
 }

vm/vm.go

@@ -254,6 +254,7 @@ func (vm *VM) call(caller, callee *Account, code, input []byte, value uint64, ga
 			yb := new(big.Int).SetBytes(y[:])
 			pow := new(big.Int).Exp(xb, yb, big.NewInt(0))
 			res := LeftPadWord256(U256(pow).Bytes())
+			stack.Push(res)
 			dbg.Printf(" %v ** %v = %v (%X)\n", xb, yb, pow, res)
 
 		case SIGNEXTEND: // 0x0B
@@ -402,8 +403,8 @@ func (vm *VM) call(caller, callee *Account, code, input []byte, value uint64, ga
 			dbg.Printf(" => (%v) %X\n", size, data)
 
 		case ADDRESS: // 0x30
-			stack.Push(flipWord(callee.Address))
-			dbg.Printf(" => %X\n", flipWord(callee.Address))
+			stack.Push(callee.Address)
+			dbg.Printf(" => %X\n", callee.Address)
 
 		case BALANCE: // 0x31
 			addr := stack.Pop()
@@ -419,12 +420,12 @@ func (vm *VM) call(caller, callee *Account, code, input []byte, value uint64, ga
 			dbg.Printf(" => %v (%X)\n", balance, addr)
 
 		case ORIGIN: // 0x32
-			stack.Push(flipWord(vm.origin))
-			dbg.Printf(" => %X\n", flipWord(vm.origin))
+			stack.Push(vm.origin)
+			dbg.Printf(" => %X\n", vm.origin)
 
 		case CALLER: // 0x33
-			stack.Push(flipWord(caller.Address))
-			dbg.Printf(" => %X\n", flipWord(caller.Address))
+			stack.Push(caller.Address)
+			dbg.Printf(" => %X\n", caller.Address)
 
 		case CALLVALUE: // 0x34
 			stack.Push64(value)
@@ -621,6 +622,7 @@ func (vm *VM) call(caller, callee *Account, code, input []byte, value uint64, ga
 			stack.Push(res)
 			pc += a
 			dbg.Printf(" => 0x%X\n", res)
+			stack.Print(10)
 
 		case DUP1, DUP2, DUP3, DUP4, DUP5, DUP6, DUP7, DUP8, DUP9, DUP10, DUP11, DUP12, DUP13, DUP14, DUP15, DUP16:
 			n := int(op - DUP1 + 1)
@@ -630,7 +632,8 @@ func (vm *VM) call(caller, callee *Account, code, input []byte, value uint64, ga
 		case SWAP1, SWAP2, SWAP3, SWAP4, SWAP5, SWAP6, SWAP7, SWAP8, SWAP9, SWAP10, SWAP11, SWAP12, SWAP13, SWAP14, SWAP15, SWAP16:
 			n := int(op - SWAP1 + 2)
 			stack.Swap(n)
-			dbg.Printf(" => [%d]\n", n)
+			dbg.Printf(" => [%d] %X\n", n, stack.Peek())
+			stack.Print(10)
 
 		case LOG0, LOG1, LOG2, LOG3, LOG4:
 			n := int(op - LOG0)
@@ -674,7 +677,7 @@ func (vm *VM) call(caller, callee *Account, code, input []byte, value uint64, ga
 				stack.Push(Zero256)
 			} else {
 				newAccount.Code = ret // Set the code
-				stack.Push(flipWord(newAccount.Address))
+				stack.Push(newAccount.Address)
 			}
 
 		case CALL, CALLCODE: // 0xF1, 0xF2