Improved Windows ABI support

src/asm/Number.go

@@ -0,0 +1,25 @@
+package asm
+
+import (
+	"fmt"
+)
+
+// Number operates with just a number.
+type Number struct {
+	Number int
+}
+
+// String returns a human readable version.
+func (data *Number) String() string {
+	return fmt.Sprintf("%d", data.Number)
+}
+
+// Number adds an instruction with a number.
+func (a *Assembler) Number(mnemonic Mnemonic, number int) {
+	a.Instructions = append(a.Instructions, Instruction{
+		Mnemonic: mnemonic,
+		Data: &Number{
+			Number: number,
+		},
+	})
+}