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from rpython.jit.codewriter.effectinfo import EffectInfo
from rpython.jit.metainterp.resoperation import rop
from rpython.jit.metainterp.history import (Const, ConstInt, ConstPtr,
ConstFloat, INT, REF, FLOAT, VECTOR, TargetToken, AbstractFailDescr)
from rpython.jit.backend.llsupport.descr import CallDescr
from rpython.jit.backend.x86.regloc import (FrameLoc, RegLoc, ConstFloatLoc,
FloatImmedLoc, ImmedLoc, imm, imm0, imm1, ecx, eax, edx, ebx, esi, edi,
ebp, r8, r9, r10, r11, r12, r13, r14, r15, xmm0, xmm1, xmm2, xmm3, xmm4,
xmm5, xmm6, xmm7, xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14,
X86_64_SCRATCH_REG, X86_64_XMM_SCRATCH_REG,)
from rpython.jit.backend.x86 import rx86, callbuilder
from rpython.jit.backend.llsupport.regalloc import (SAVE_DEFAULT_REGS,
SAVE_GCREF_REGS, SAVE_ALL_REGS)
from rpython.jit.backend.x86.regalloc import (
gpr_reg_mgr_cls, xmm_reg_mgr_cls, compute_gc_level,
X86RegisterManager, X86XMMRegisterManager,
X86_64_RegisterManager, X86_64_XMMRegisterManager, compute_gc_level
)
from rpython.jit.backend.x86.arch import IS_X86_32, IS_X86_64
# tell the register allocator hints about which variables should be placed in
# what registers (those are just hints, the register allocator will try its
# best to achieve that).
class X86RegisterHints(object):
def add_hints(self, longevity, inputargs, operations):
self.longevity = longevity
for i in range(len(operations)):
op = operations[i]
if rop.has_no_side_effect(op.opnum) and op not in self.longevity:
continue
oplist[op.getopnum()](self, op, i)
def not_implemented_op(self, op, position):
# no hint by default
pass
def consider_int_neg(self, op, position):
self.longevity.try_use_same_register(op.getarg(0), op)
consider_int_invert = consider_int_neg
def _consider_binop_part(self, op, position, symm=False):
x = op.getarg(0)
y = op.getarg(1)
# For symmetrical operations, if y won't be used after the current
# operation finishes, but x will be, then swap the role of 'x' and 'y'
if symm:
if isinstance(x, Const):
x, y = y, x
elif (not isinstance(y, Const) and
self.longevity[x].last_usage > position and
self.longevity[y].last_usage == position):
x, y = y, x
if not isinstance(x, Const):
self.longevity.try_use_same_register(x, op)
def _consider_binop(self, op, position):
self._consider_binop_part(op, position)
def _consider_binop_symm(self, op, position):
self._consider_binop_part(op, position, symm=True)
consider_int_mul = _consider_binop_symm
consider_int_and = _consider_binop_symm
consider_int_or = _consider_binop_symm
consider_int_xor = _consider_binop_symm
consider_int_mul_ovf = _consider_binop_symm
consider_int_sub_ovf = _consider_binop
consider_int_add_ovf = _consider_binop_symm
def consider_int_add(self, op, position):
y = op.getarg(1)
if isinstance(y, ConstInt) and rx86.fits_in_32bits(y.value):
pass # nothing to be hinted
else:
self._consider_binop_symm(op, position)
consider_nursery_ptr_increment = consider_int_add
def consider_int_sub(self, op, position):
y = op.getarg(1)
if isinstance(y, ConstInt) and rx86.fits_in_32bits(-y.value):
pass # nothing to be hinted
else:
self._consider_binop(op, position)
def _consider_float_op(self, op, position):
x = op.getarg(0)
if not isinstance(x, Const):
self.longevity.try_use_same_register(x, op)
consider_float_add = _consider_float_op
consider_float_sub = _consider_float_op
consider_float_mul = _consider_float_op
consider_float_truediv = _consider_float_op
consider_float_neg = _consider_float_op
consider_float_abs = _consider_float_op
def consider_int_lshift(self, op, position):
x, y = op.getarg(0), op.getarg(1)
if not isinstance(y, Const):
self.longevity.fixed_register(position, ecx, y)
if not isinstance(x, Const):
self.longevity.try_use_same_register(x, op)
consider_int_rshift = consider_int_lshift
consider_uint_rshift = consider_int_lshift
def consider_uint_mul_high(self, op, position):
# could do a lot more, but I suspect not worth it
# just block eax and edx
self.longevity.fixed_register(position, eax)
self.longevity.fixed_register(position, edx)
def consider_call_malloc_nursery(self, op, position):
self.longevity.fixed_register(position, ecx, op)
self.longevity.fixed_register(position, edx)
consider_call_malloc_nursery_varsize = consider_call_malloc_nursery
consider_call_malloc_nursery_varsize_frame = consider_call_malloc_nursery
def _consider_call(self, op, position, guard_not_forced=False, first_arg_index=1):
calldescr = op.getdescr()
assert isinstance(calldescr, CallDescr)
gc_level = compute_gc_level(calldescr, guard_not_forced)
args = op.getarglist()[first_arg_index:]
argtypes = calldescr.get_arg_types()
CallHints64(self.longevity).hint(position, args, argtypes, gc_level)
def _consider_real_call(self, op, position):
effectinfo = op.getdescr().get_extra_info()
assert effectinfo is not None
oopspecindex = effectinfo.oopspecindex
if oopspecindex != EffectInfo.OS_NONE:
# XXX safe default: do nothing
return
self._consider_call(op, position)
consider_call_i = _consider_real_call
consider_call_r = _consider_real_call
consider_call_f = _consider_real_call
consider_call_n = _consider_real_call
def _consider_call_may_force(self, op, position):
self._consider_call(op, position, guard_not_forced=True)
consider_call_may_force_i = _consider_call_may_force
consider_call_may_force_r = _consider_call_may_force
consider_call_may_force_f = _consider_call_may_force
consider_call_may_force_n = _consider_call_may_force
def _consider_call_release_gil(self, op, position):
# [Const(save_err), func_addr, args...]
self._consider_call(op, position, guard_not_forced=True, first_arg_index=2)
consider_call_release_gil_i = _consider_call_release_gil
consider_call_release_gil_f = _consider_call_release_gil
consider_call_release_gil_n = _consider_call_release_gil
oplist = [X86RegisterHints.not_implemented_op] * rop._LAST
for name, value in X86RegisterHints.__dict__.iteritems():
if name.startswith('consider_'):
name = name[len('consider_'):]
num = getattr(rop, name.upper())
oplist[num] = value
class CallHints32(object):
def _block_non_caller_save(self, position, save_all_regs, hinted_gpr=None, hinted_xmm=None):
if hinted_gpr is None:
hinted_gpr = []
if hinted_xmm is None:
hinted_xmm = []
# block all remaining registers that are not caller save
# XXX the case save_all_regs == SAVE_GCREF_REGS
# (save callee-save regs + gc ptrs) is not expressible atm
if save_all_regs == SAVE_ALL_REGS:
regs = gpr_reg_mgr_cls.all_regs
else:
regs = gpr_reg_mgr_cls.save_around_call_regs
for reg in regs:
if reg not in hinted_gpr:
self.longevity.fixed_register(position, reg)
for reg in xmm_reg_mgr_cls.all_regs:
if reg not in hinted_xmm:
self.longevity.fixed_register(position, reg)
def hint(self, position, args, argtypes, save_all_regs):
self._block_non_caller_save(position, save_all_regs)
class CallHints64(CallHints32):
ARGUMENTS_GPR = callbuilder.CallBuilder64.ARGUMENTS_GPR
ARGUMENTS_XMM = callbuilder.CallBuilder64.ARGUMENTS_XMM
def __init__(self, longevity):
self.longevity = longevity
def hint(self, position, args, argtypes, save_all_regs):
hinted_xmm = []
hinted_gpr = []
hinted_args = []
next_arg_gpr = 0
next_arg_xmm = 0
for i in range(len(args)):
arg = args[i]
if arg.type == "f" or (i < len(argtypes) and argtypes[i] == 'S'):
if next_arg_xmm < len(self.ARGUMENTS_XMM):
tgt = self.ARGUMENTS_XMM[next_arg_xmm]
if not arg.is_constant() and arg not in hinted_args:
self.longevity.fixed_register(position, tgt, arg)
hinted_xmm.append(tgt)
hinted_args.append(arg)
next_arg_xmm += 1
else:
if next_arg_gpr < len(self.ARGUMENTS_GPR):
tgt = self.ARGUMENTS_GPR[next_arg_gpr]
if not arg.is_constant() and arg not in hinted_args:
self.longevity.fixed_register(position, tgt, arg)
hinted_gpr.append(tgt)
hinted_args.append(arg)
next_arg_gpr += 1
self._block_non_caller_save(position, save_all_regs, hinted_gpr, hinted_xmm)
if IS_X86_32:
CallHints = CallHints32
if IS_X86_64:
CallHints = CallHints64
|
