miasm2.arch.arm.arch.armt2_imm12 Class Reference

Inheritance diagram for miasm2.arch.arm.arch.armt2_imm12:

Collaboration diagram for miasm2.arch.arm.arch.armt2_imm12:

Public Member Functions
def	decode
def	encode
def	int2expr
def	expr2int
def	fromstring
def	fromstring
def	decodeval
def	encodeval

Public Attributes
	expr
	value

Static Public Attributes
	parser = base_expr
int	intsize = 32
tuple	intmask = (1 << intsize)

Detailed Description

Definition at line 2072 of file arch.py.

Member Function Documentation

def miasm2.arch.arm.arch.armt2_imm12.decode	(		self,
			v
	)

Definition at line 2074 of file arch.py.

    def decode(self, v):
        v = v & self.lmask
        v |= int(self.parent.imm12_3.value) << 8
        v |= int(self.parent.imm12_1.value) << 11

        # simple encoding
        if 0 <= v < 0x100:
            self.expr = ExprInt32(v)
            return True
        # 00XY00XY form
        if v >> 8 == 1:
            v &= 0xFF
            self.expr = ExprInt32((v << 16) | v)
            return True
        # XY00XY00 form
        if v >> 8 == 2:
            v &= 0xFF
            self.expr = ExprInt32((v << 24) | (v << 8))
            return True
        # XYXYXYXY
        if v >> 8 == 3:
            v &= 0xFF
            self.expr = ExprInt32((v << 24) | (v << 16) | (v << 8) | v)
            return True
        r = v >> 7
        v = v & 0xFF
        self.expr = ExprInt32(myror32(v, r))
        return True