def decode(self, v):
v = v & self.lmask
v <<= 2
v = cpu.sign_ext(v, 16+2, 32)
# Add pipeline offset
self.expr = ExprInt(v + 4, 32)
return True
def decode(self, v):
v = v & self.lmask
v <<= 2
v = cpu.sign_ext(v, 16 + 2, 32)
# Add pipeline offset
self.expr = ExprInt32(v + 4)
return True
def test_sra(self):
"""Test SRA execution"""
# SRA Rn, Rm
exec_instruction("SRA R1, R2",
[(ExprId("R1", 32), ExprInt(4, 32)), (ExprId("R2", 32), ExprInt(1, 32))],
[(ExprId("R1", 32), ExprInt(2, 32))])
exec_instruction("SRA R1, R2",
[(ExprId("R1", 32), ExprInt(sign_ext(4, 3, 32), 32)), (ExprId("R2", 32), ExprInt(1, 32))],
[(ExprId("R1", 32), ExprInt(0xFFFFFFFE, 32))])
exec_instruction("SRA R1, R2",
[(ExprId("R1", 32), ExprInt(0xF0000000, 32)), (ExprId("R2", 32), ExprInt(4, 32))],
[(ExprId("R1", 32), ExprInt(0xFF000000, 32))])
# SRA Rn,imm5
exec_instruction("SRA R1, 1",
[(ExprId("R1", 32), ExprInt(4, 32))],
[(ExprId("R1", 32), ExprInt(2, 32))])
# SRA Rn,imm5
exec_instruction("SRA R1, 1",
[(ExprId("R1", 32), ExprInt(0x80000000, 32))],
[(ExprId("R1", 32), ExprInt(0xC0000000, 32))])
exec_instruction("SRA R1, 1",
[(ExprId("R1", 32), ExprInt(1, 32))],
[(ExprId("R1", 32), ExprInt(0, 32))])
def encode(self):
if not isinstance(self.expr, ExprInt):
return False
v = self.expr.arg.arg
if v & 0x80000000:
nv = v & ((1 << 16) - 1)
assert v == cpu.sign_ext(nv, 16, 32)
v = nv
self.value = v
return True
def encode(self):
if not isinstance(self.expr, ExprInt):
return False
v = self.expr.arg.arg
if v & 0x80000000:
nv = v & ((1 << 16) - 1)
assert( v == cpu.sign_ext(nv, 16, 32))
v = nv
self.value = v
return True
def encode(self):
if not isinstance(self.expr, ExprInt):
return False
# Remove pipeline offset
v = int(self.expr.arg - 4)
if v & 0x80000000:
nv = v & ((1 << 16 + 2) - 1)
assert v == cpu.sign_ext(nv, 16 + 2, 32)
v = nv
self.value = v >> 2
return True
def encode(self):
if not isinstance(self.expr, ExprInt):
return False
# Remove pipeline offset
v = int(self.expr.arg - 4)
if v & 0x80000000:
nv = v & ((1 << 16+2) - 1)
assert( v == cpu.sign_ext(nv, 16+2, 32))
v = nv
self.value = v>>2
return True
def decode(self, v):
v = v & self.lmask
v = cpu.sign_ext(v, 16, 32)
self.expr = ExprInt32(v)
return True
def decode(self, v):
v = v & self.lmask
v = cpu.sign_ext(v, 16, 32)
self.expr = ExprInt(v, 32)
return True
def decode(self, v):
v = v & self.lmask
v <<= 2
v = cpu.sign_ext(v, 16 + 2, 32)
self.expr = ExprInt32(v)
return True
