def load_value_int32(code, reg, value, clear = False):
# obviously, value should be 32 bit integer
code.add(spu.ilhu(reg, value / pow(2, 16))) # immediate load halfword upper
code.add(spu.iohl(reg, value % pow(2, 16))) # immediate or halfword lower
if clear:
code.add(spu.shlqbyi(reg, reg, 12)) # shift left qw by bytes, clears right bytes
return
def load_value_int32(code, reg, value, clear = False):
# obviously, value should be 32 bit integer
code.add(spu.ilhu(reg, value / pow(2, 16))) # immediate load halfword upper
code.add(spu.iohl(reg, value % pow(2, 16))) # immediate or halfword lower
if clear:
code.add(spu.shlqbyi(reg, reg, 12)) # shift left qw by bytes, clears right bytes
return
def load_word(code, r_target, word, clear=False, zero=True):
"""If r0 is not set to 0, the zero parameter should be set to False"""
if zero and (-512 < word < 511):
code.add(spu.ai(r_target, code.r_zero, word))
elif (word & 0x7FFF) == word:
code.add(spu.il(r_target, word))
elif (word & 0x3FFFF) == word:
code.add(spu.ila(r_target, word))
else:
code.add(spu.ilhu(r_target, (word & 0xFFFF0000) >> 16))
code.add(spu.iohl(r_target, (word & 0xFFFF)))
if clear:
code.add(spu.shlqbyi(r_target, r_target, 12))
return
def load_word(code, r_target, word, clear = False, zero = True):
"""If r0 is not set to 0, the zero parameter should be set to False"""
#if zero and (-512 < word < 511):
# code.add(spu.ai(r_target, code.r_zero, word))
#elif (word & 0x7FFF) == word:
# code.add(spu.il(r_target, word))
if (word & 0x3FFFF) == word:
code.add(spu.ila(r_target, word))
else:
code.add(spu.ilhu(r_target, (word & 0xFFFF0000) >> 16))
if word & 0xFFFF != 0:
code.add(spu.iohl(r_target, (word & 0xFFFF)))
if clear:
code.add(spu.shlqbyi(r_target, r_target, 12))
return
self.reg_frame.Update()
self.ls_frame.Update()
self.mem_frame.Update()
return
if __name__ == '__main__':
prgm = env.Program()
code = prgm.get_stream()
reg = prgm.acquire_register()
foo = prgm.acquire_register(reg_name=5)
code.add(prgm.get_label("FOO"))
code.add(spu.il(foo, 0xCAFE))
code.add(spu.ilhu(reg, 0xDEAD))
code.add(spu.iohl(reg, 0xBEEF))
code.add(spu.stqd(reg, code.r_zero, 4))
lbl_loop = prgm.get_label("LOOP")
lbl_break = prgm.get_label("BREAK")
r_cnt = code.gp_return
r_stop = prgm.acquire_register(reg_name=9)
r_cmp = prgm.acquire_register()
code.add(spu.ori(r_cnt, code.r_zero, 0))
code.add(spu.il(r_stop, 5))
code.add(lbl_loop)
code.add(spu.ceq(r_cmp, r_cnt, r_stop))
code.add(spu.brnz(r_cmp, prgm.get_label("BREAK")))
self.reg_frame.Update()
self.ls_frame.Update()
self.mem_frame.Update()
return
if __name__=='__main__':
prgm = env.Program()
code = prgm.get_stream()
reg = prgm.acquire_register()
foo = prgm.acquire_register(reg_name = 5)
code.add(prgm.get_label("FOO"))
code.add(spu.il(foo, 0xCAFE))
code.add(spu.ilhu(reg, 0xDEAD))
code.add(spu.iohl(reg, 0xBEEF))
code.add(spu.stqd(reg, code.r_zero, 4))
lbl_loop = prgm.get_label("LOOP")
lbl_break = prgm.get_label("BREAK")
r_cnt = code.gp_return
r_stop = prgm.acquire_register(reg_name = 9)
r_cmp = prgm.acquire_register()
code.add(spu.ori(r_cnt, code.r_zero, 0))
code.add(spu.il(r_stop, 5))
code.add(lbl_loop)
code.add(spu.ceq(r_cmp, r_cnt, r_stop))
code.add(spu.brnz(r_cmp, prgm.get_label("BREAK")))
