gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Moved assembler stage to the mutan compiler

Browse Source
This commit is contained in:
obscuren
2014-04-27 18:01:37 +02:00
parent bf850974f3
commit 21f8806eed
2 changed files with 0 additions and 224 deletions
Download Patch File Download Diff File Expand all files Collapse all files

193
ethutil/asm.go
View File

@@ -1,193 +0,0 @@
package ethutil
import (
_ "fmt"
"math/big"
_ "regexp"
)
// Op codes
var OpCodes = map[string]byte{
// 0x0 range - arithmetic ops
"STOP": 0x00,
"ADD": 0x01,
"MUL": 0x02,
"SUB": 0x03,
"DIV": 0x04,
"SDIV": 0x05,
"MOD": 0x06,
"SMOD": 0x07,
"EXP": 0x08,
"NEG": 0x09,
"LT": 0x0a,
"GT": 0x0b,
"EQ": 0x0c,
"NOT": 0x0d,
// 0x10 range - bit ops
"AND": 0x10,
"OR": 0x11,
"XOR": 0x12,
"BYTE": 0x13,
// 0x20 range - crypto
"SHA3": 0x20,
// 0x30 range - closure state
"ADDRESS": 0x30,
"BALANCE": 0x31,
"ORIGIN": 0x32,
"CALLER": 0x33,
"CALLVALUE": 0x34,
"CALLDATALOAD": 0x35,
"CALLDATASIZE": 0x36,
"GASPRICE": 0x38,
// 0x40 range - block operations
"PREVHASH": 0x40,
"COINBASE": 0x41,
"TIMESTAMP": 0x42,
"NUMBER": 0x43,
"DIFFICULTY": 0x44,
"GASLIMIT": 0x45,
// 0x50 range - 'storage' and execution
"PUSH": 0x50,
"PUSH20": 0x80,
"POP": 0x51,
"DUP": 0x52,
"SWAP": 0x53,
"MLOAD": 0x54,
"MSTORE": 0x55,
"MSTORE8": 0x56,
"SLOAD": 0x57,
"SSTORE": 0x58,
"JUMP": 0x59,
"JUMPI": 0x5a,
"PC": 0x5b,
"MSIZE": 0x5c,
// 0x60 range - closures
"CREATE": 0x60,
"CALL": 0x61,
"RETURN": 0x62,
// 0x70 range - other
"LOG": 0x70,
"SUICIDE": 0x7f,
}
// Is op code
//
// Check whether the given string matches anything in
// the OpCode list
func IsOpCode(s string) bool {
for key, _ := range OpCodes {
if key == s {
return true
}
}
return false
}
// Compile instruction
//
// Attempts to compile and parse the given instruction in "s"
// and returns the byte sequence
func CompileInstr(s interface{}) ([]byte, error) {
switch s.(type) {
case string:
str := s.(string)
isOp := IsOpCode(str)
if isOp {
return []byte{OpCodes[str]}, nil
}
num := new(big.Int)
_, success := num.SetString(str, 0)
// Assume regular bytes during compilation
if !success {
num.SetBytes([]byte(str))
} else {
// tmp fix for 32 bytes
n := BigToBytes(num, 256)
return n, nil
}
return num.Bytes(), nil
case int:
num := BigToBytes(big.NewInt(int64(s.(int))), 256)
return num, nil
case []byte:
return BigD(s.([]byte)).Bytes(), nil
}
return nil, nil
}
// Assemble
//
// Assembles the given instructions and returns EVM byte code
func Assemble(instructions ...interface{}) (script []byte) {
//script = make([]string, len(instructions))
for _, val := range instructions {
instr, _ := CompileInstr(val)
//script[i] = string(instr)
script = append(script, instr...)
}
return
}
// Pre process script
//
// Take data apart and attempt to find the "init" section and
// "main" section. `main { } init { }`
func PreProcess(data string) (mainInput, initInput string) {
mainInput = getCodeSectionFor("main", data)
if mainInput == "" {
mainInput = data
}
initInput = getCodeSectionFor("init", data)
return
}
// Very, very dumb parser. Heed no attention :-)
func getCodeSectionFor(blockMatcher, input string) string {
curCount := -1
length := len(blockMatcher)
matchfst := rune(blockMatcher[0])
var currStr string
for i, run := range input {
// Find init
if curCount == -1 && run == matchfst && input[i:i+length] == blockMatcher {
curCount = 0
} else if curCount > -1 {
if run == '{' {
curCount++
if curCount == 1 {
continue
}
} else if run == '}' {
curCount--
if curCount == 0 {
// we are done
curCount = -1
break
}
}
if curCount > 0 {
currStr += string(run)
}
}
}
return currStr
}

31
ethutil/asm_test.go
View File

@@ -1,31 +0,0 @@
package ethutil
import (
"fmt"
"testing"
)
func TestPreProcess(t *testing.T) {
main, init := PreProcess(`
init {
// init
if a > b {
if {
}
}
}
main {
// main
if a > b {
if c > d {
}
}
}
`)
fmt.Println("main")
fmt.Println(main)
fmt.Println("init")
fmt.Println(init)
}