func (e *Emitter) addInstr(fn *bytecode.Fn, op bytecode.Opcode, flg bytecode.Flag, ix uint64) {
if e.err != nil {
return
}
switch op {
case bytecode.OP_PUSH:
e.stackSz[fn] += 1
case bytecode.OP_NEW:
e.stackSz[fn] += (1 - (2 * int64(ix)))
case bytecode.OP_POP, bytecode.OP_RET, bytecode.OP_UNM, bytecode.OP_NOT, bytecode.OP_TEST,
bytecode.OP_LT, bytecode.OP_LTE, bytecode.OP_GT, bytecode.OP_GTE, bytecode.OP_EQ,
bytecode.OP_ADD, bytecode.OP_SUB, bytecode.OP_MUL,
bytecode.OP_DIV, bytecode.OP_MOD, bytecode.OP_GFLD, bytecode.OP_NEQ:
e.stackSz[fn] -= 1
case bytecode.OP_SFLD:
e.stackSz[fn] -= 3
case bytecode.OP_CALL:
e.stackSz[fn] -= (int64(ix) + 1)
case bytecode.OP_CFLD:
e.stackSz[fn] -= (int64(ix) + 2)
}
if e.stackSz[fn] > fn.Header.StackSz {
fn.Header.StackSz = e.stackSz[fn]
}
fn.Is = append(fn.Is, bytecode.NewInstr(op, flg, ix))
}
func (a *Asm) readIs(fn *bytecode.Fn) {
var l string
var ok bool
// While a new F section is not reached
for l, ok = a.getLine(false); ok && l != "[f]"; l, ok = a.getLine(false) {
// Split in three parts
parts := strings.SplitN(l, " ", 3)
if a.assertIParts(parts) {
var ix uint64
o := bytecode.NewOpcode(parts[0])
f := bytecode.NewFlag(parts[1])
ix, a.err = strconv.ParseUint(parts[2], 10, 64)
fn.Is = append(fn.Is, bytecode.NewInstr(o, f, ix))
}
}
if ok {
a.readFn()
}
}
