def _align_stream(self, length, align):
# Return nop's such that length % align = 0
if align % 4 != 0:
raise Exception("SPU alignment must be a multiple of 4 bytes")
length /= 4
align /= 4
mod = align - (length % align)
# need mod instructions to achieve alignment
ret = []
if mod % 2 == 0:
nop_pair = (spu.nop(self.r_zero, ignore_active = True),
spu.lnop(ignore_active = True))
# issue mod / 2 nop/lnop pairs
for i in xrange(0, mod / 2):
ret.extend(nop_pair)
else:
# issue an lnop, then (mod - 1) / 2 nop/lnop pairs
nop_pair = (spu.lnop(ignore_active = True),
spu.nop(self.r_zero, ignore_active = True))
for i in xrange(0, mod / 2):
ret.extend(nop_pair)
ret.append(spu.lnop(ignore_active = True))
return ret
def _align_stream(self, length, align):
# Return nop's such that length % align = 0
if align % 4 != 0:
raise Exception("SPU alignment must be a multiple of 4 bytes")
length /= 4
align /= 4
mod = align - (length % align)
# need mod instructions to achieve alignment
ret = []
if mod % 2 == 0:
nop_pair = (spu.nop(self.r_zero, ignore_active=True),
spu.lnop(ignore_active=True))
# issue mod / 2 nop/lnop pairs
for i in xrange(0, mod / 2):
ret.extend(nop_pair)
else:
# issue an lnop, then (mod - 1) / 2 nop/lnop pairs
nop_pair = (spu.lnop(ignore_active=True),
spu.nop(self.r_zero, ignore_active=True))
for i in xrange(0, mod / 2):
ret.extend(nop_pair)
ret.append(spu.lnop(ignore_active=True))
return ret
def cache_code(self):
"""
Add a stop signal with return type 0x2000 (EXIT_SUCCESS) to the
end if the instruction stream. (BE Handbook, p. 422).
"""
# Generate the prologue
self._synthesize_prologue()
# Don't have a real epilogue.
self.add(spu.stop(0x2000))
# self._check_alignment(self._code, 'spu code')
# self.exec_module.make_executable(self._code.buffer_info()[0], len(self._code))
# Append our instructions to the prologue's, first making sure the alignment is correct.
if len(self._prologue._code) % 2 == 1: # Odd number of instructions
self._prologue.add(spu.lnop(0))
self._prologue._code.extend(self._code)
self._prologue._check_alignment(self._prologue._code, 'spu prologue')
self._epilogue = self
self._cached = True
return
def cache_code(self):
"""
Add a stop signal with return type 0x2000 (EXIT_SUCCESS) to the
end if the instruction stream. (BE Handbook, p. 422).
"""
# Generate the prologue
self._synthesize_prologue()
# Don't have a real epilogue.
self.add(spu.stop(0x2000))
# self._check_alignment(self._code, 'spu code')
# self.exec_module.make_executable(self._code.buffer_info()[0], len(self._code))
# Append our instructions to the prologue's, first making sure the alignment is correct.
if len(self._prologue._code) % 2 == 1: # Odd number of instructions
self._prologue.add(spu.lnop(0))
self._prologue._code.extend(self._code)
self._prologue._check_alignment(self._prologue._code, 'spu prologue')
self._epilogue = self
self._cached = True
return
def _synthesize_prologue(self):
"""
Setup register 0.
"""
# Reserve register r0 for the value zero
# TODO - technically this is not needed, system sets all regs to 0
self._prologue = [self.lbl_prologue,
spu.il(self.r_zero, 0, ignore_active = True),
spu.lnop(ignore_active = True)]
return
def _synthesize_prologue(self):
"""
Setup register 0.
"""
self._prologue = [self.lbl_prologue]
# Reserve register r0 for the value zero
self._prologue.append(spu.il(self.r_zero, 0, ignore_active=True))
self._prologue.append(spu.lnop(ignore_active=True))
return
def _synthesize_prologue(self):
"""
Setup register 0.
"""
# Reserve register r0 for the value zero
# TODO - technically this is not needed, system sets all regs to 0
self._prologue = [self.lbl_prologue,
spu.il(self.r_zero, 0, ignore_active = True),
spu.lnop(ignore_active = True)]
return
def align_code(self, boundary):
"""
Insert the appropraite nop/lnops to align the next instruction
on the byte boudary. boundary must be a multiple of four.
"""
word_align = boundary / 4
while len(self._code) % word_align:
if len(self._code) % 2 == 0:
self.add(spu.nop(0), True)
else:
self.add(spu.lnop(0), True)
return
def align_code(self, boundary):
"""
Insert the appropraite nop/lnops to align the next instruction
on the byte boudary. boundary must be a multiple of four.
"""
word_align = boundary / 4
while len(self._code) % word_align:
if len(self._code) % 2 == 0:
self.add(spu.nop(0), True)
else:
self.add(spu.lnop(0), True)
return
def add(self, inst, optimize_override=False):
if not optimize_override and self._optimize:
# binary_string_inst = spu.DecToBin(inst)
op = 'nop'
# if binary_string_inst[0:3] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:3]]
# elif binary_string_inst[0:6] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:6]]
# elif binary_string_inst[0:7] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:7]]
# elif binary_string_inst[0:8] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:8]]
# elif binary_string_inst[0:9] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:9]]
# elif binary_string_inst[0:10] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:10]]
pipeline = inst.cycles[0]
if (len(self._code) % 2 == 0) and pipeline == 0:
InstructionStream.add(self, inst)
elif (len(self._code) % 2 == 1) and pipeline == 1:
InstructionStream.add(self, inst)
elif (len(self._code) % 2 == 0) and pipeline == 1:
InstructionStream.add(self, spu.nop(0))
InstructionStream.add(self, inst)
elif (len(self._code) % 2 == 1) and pipeline == 0:
InstructionStream.add(self, spu.lnop(0))
InstructionStream.add(self, inst)
else:
spe.InstructionStream.add(self, inst)
# Invalidate the cache
self._cached = False
return len(self._code)
def add(self, inst, optimize_override = False):
if not optimize_override and self._optimize:
# binary_string_inst = spu.DecToBin(inst)
op = 'nop'
# if binary_string_inst[0:3] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:3]]
# elif binary_string_inst[0:6] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:6]]
# elif binary_string_inst[0:7] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:7]]
# elif binary_string_inst[0:8] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:8]]
# elif binary_string_inst[0:9] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:9]]
# elif binary_string_inst[0:10] in spu.inst_opcodes:
# op = spu.inst_opcodes[binary_string_inst[0:10]]
pipeline = inst.cycles[0]
if (len(self._code) % 2 == 0) and pipeline == 0:
InstructionStream.add(self, inst)
elif (len(self._code) % 2 == 1) and pipeline == 1:
InstructionStream.add(self, inst)
elif (len(self._code) % 2 == 0) and pipeline == 1:
InstructionStream.add(self, spu.nop(0))
InstructionStream.add(self, inst)
elif (len(self._code) % 2 == 1) and pipeline == 0:
InstructionStream.add(self, spu.lnop(0))
InstructionStream.add(self, inst)
else:
spe.InstructionStream.add(self, inst)
# Invalidate the cache
self._cached = False
return len(self._code)