init

6 files changed, 199 insertions, 0 deletions

diff --git a/as/as b/as/as
new file mode 100755
index 0000000..3c80b92
--- /dev/null
+++ b/as/as
diff --git a/as/as.go b/as/as.go
new file mode 100644
index 0000000..bcc7cf8
--- /dev/null
+++ b/as/as.go
@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"github.com/holiman/uint256"
+
+)
+
+func Assemble(code string) []byte {
+	bytecode := make([]byte, 0)
+
+	t := strings.Fields(code)
+
+	for i := range t {
+		x, found := OpcodeStrings[t[i]]
+
+		if found {
+			bytecode = append(bytecode, x)
+		} else {
+			var n *uint256.Int = nil
+			if len(t[i]) > 1 && t[i][1] == 'x' {
+				n, _ = uint256.FromHex(t[i])
+			} else {
+				n, _ = uint256.FromDecimal(t[i])
+			} 
+			b := n.Bytes32()
+			bytecode = append(bytecode, b[:]...)
+		}
+	}
+	return bytecode
+}
diff --git a/as/go.mod b/as/go.mod
new file mode 100644
index 0000000..6f40dd8
--- /dev/null
+++ b/as/go.mod
@@ -0,0 +1,5 @@
+module s00.xyz/as
+
+go 1.20
+
+require github.com/holiman/uint256 v1.2.2 // indirect
diff --git a/as/go.sum b/as/go.sum
new file mode 100644
index 0000000..e0f03a0
--- /dev/null
+++ b/as/go.sum
@@ -0,0 +1,2 @@
+github.com/holiman/uint256 v1.2.2 h1:TXKcSGc2WaxPD2+bmzAsVthL4+pEN0YwXcL5qED83vk=
+github.com/holiman/uint256 v1.2.2/go.mod h1:SC8Ryt4n+UBbPbIBKaG9zbbDlp4jOru9xFZmPzLUTxw=
diff --git a/as/main.go b/as/main.go
new file mode 100644
index 0000000..95aff46
--- /dev/null
+++ b/as/main.go
@@ -0,0 +1,59 @@
+package main
+
+import (
+	"os"
+	"fmt"
+)
+
+func usage(arg0 string) {
+	fmt.Fprintf(os.Stderr, "usage: %s [-o file] file.easm\n", os.Args[0])
+	os.Exit(1)
+}
+
+func main() {
+	if (len(os.Args) <= 2) {
+		usage(os.Args[0])
+	}
+	
+	
+	var aout int = 0
+	var ain int = 0
+
+	for i := 0; i < len(os.Args); i++ {
+		fmt.Println(os.Args[i])
+		switch os.Args[i] {
+		case "-o": 
+			i = i + 1
+			aout = i
+		default: 
+			ain = i
+		}
+	}
+
+	if (ain == 0) {
+		usage(os.Args[0])
+	}
+	
+	var outf string = "out.bin"
+	if (aout != 0) {
+		outf = os.Args[aout]
+	}
+
+	b, errin := os.ReadFile(os.Args[ain])
+	out, errout := os.Create(outf)
+
+	if errin != nil {
+		fmt.Fprintf(os.Stderr, "failed to read file: %s\n", os.Args[ain])
+		os.Exit(1)
+	}
+
+	if errout != nil {
+		fmt.Fprintf(os.Stderr, "failed to create file for output: %s\n", outf)
+		os.Exit(1)
+	}
+
+	s := string(b)
+	c := Assemble(s)
+
+	out.Write(c)
+}
diff --git a/as/opcodes.go b/as/opcodes.go
new file mode 100644
index 0000000..94c2e2b
--- /dev/null
+++ b/as/opcodes.go
@@ -0,0 +1,101 @@
+package main
+
+type Opcode byte
+
+const (
+	STOP = iota
+	ADD 
+	MUL
+	SUB
+	DIV
+	SDIV
+	MOD
+	SMOD
+	ADDMOD
+	MULMOD
+	POP = 0x50
+	MLOAD = 0x51
+	MSTORE = 0x52
+	MSTORE8 = 0x53
+	PUSH1 = 0x60
+	PUSH2 = 0x61
+	PUSH3 = 0x62
+	PUSH4 = 0x63
+	PUSH5 = 0x64
+	PUSH6 = 0x65
+	PUSH7 = 0x66
+	PUSH8 = 0x67
+	PUSH9 = 0x68
+	PUSH10 = 0x69
+	PUSH11 = 0x6a
+	PUSH12 = 0x6b
+	PUSH13 = 0x6c
+	PUSH14 = 0x6d 
+	PUSH15 = 0x6e
+	PUSH16 = 0x6f
+	PUSH17 = 0x70
+	PUSH18 = 0x71
+	PUSH19 = 0x72
+	PUSH20 = 0x73
+	PUSH21 = 0x74
+	PUSH22 = 0x75
+	PUSH23 = 0x76
+	PUSH24 = 0x77
+	PUSH25 = 0x78
+	PUSH26 = 0x79
+	PUSH27 = 0x7a
+	PUSH28 = 0x7b
+	PUSH29 = 0x7c
+	PUSH30 = 0x7d
+	PUSH31 = 0x7e
+	PUSH32 = 0x7f
+)
+
+var OpcodeStrings = map[string]byte {
+	"STOP":    STOP,
+	"ADD":     ADD,
+	"MUL":     MUL,
+	"SUB":     SUB,
+	"DIV":     DIV,
+	"SDIV":    SDIV,
+	"MOD":     MOD,
+	"SMOD":    SMOD,
+	"ADDMOD":  ADDMOD,
+	"MULMOD":  MULMOD,
+	"POP":     POP,
+	"MLOAD":   MLOAD,
+	"MSTORE":  MSTORE,
+	"MSTORE8": MSTORE8,
+	"PUSH1":   PUSH1,
+	"PUSH2":   PUSH2,
+	"PUSH3":   PUSH3,
+	"PUSH4":   PUSH4,
+	"PUSH5":   PUSH5,
+	"PUSH6":   PUSH6,
+	"PUSH7":   PUSH7,
+	"PUSH8":   PUSH8,
+	"PUSH9":   PUSH9,
+	"PUSH10":   PUSH10,
+	"PUSH11":   PUSH11,
+	"PUSH12":   PUSH12,
+	"PUSH13":   PUSH13,
+	"PUSH14":   PUSH14,
+	"PUSH15":   PUSH15,
+	"PUSH16":   PUSH16,
+	"PUSH17":   PUSH17,
+	"PUSH18":   PUSH18,
+	"PUSH19":   PUSH19,
+	"PUSH20":   PUSH20,
+	"PUSH21":   PUSH21,
+	"PUSH22":   PUSH22,
+	"PUSH23":   PUSH23,
+	"PUSH24":   PUSH24,
+	"PUSH25":   PUSH25,
+	"PUSH26":   PUSH26,
+	"PUSH27":   PUSH27,
+	"PUSH28":   PUSH28,
+	"PUSH29":   PUSH29,
+	"PUSH30":   PUSH30,
+	"PUSH31":   PUSH31,
+	"PUSH32":   PUSH32,
+}