def _emit_guard(self, op, arglocs, is_guard_not_invalidated=False):
if is_guard_not_invalidated:
fcond = c.cond_none
else:
fcond = self.guard_success_cc
self.guard_success_cc = c.cond_none
assert fcond.value != c.cond_none.value
fcond = c.negate(fcond)
token = self.build_guard_token(op, arglocs[0].value, arglocs[1:], fcond)
token.pos_jump_offset = self.mc.currpos()
assert token.guard_not_invalidated() == is_guard_not_invalidated
if not is_guard_not_invalidated:
self.mc.reserve_guard_branch() # has to be patched later on
self.pending_guard_tokens.append(token)
def _emit_guard(self, op, arglocs, is_guard_not_invalidated=False):
if is_guard_not_invalidated:
fcond = c.cond_none
else:
fcond = self.guard_success_cc
self.guard_success_cc = c.cond_none
assert fcond.value != c.cond_none.value
fcond = c.negate(fcond)
token = self.build_guard_token(op, arglocs[0].value, arglocs[1:],
fcond)
token.pos_jump_offset = self.mc.currpos()
assert token.guard_not_invalidated() == is_guard_not_invalidated
if not is_guard_not_invalidated:
self.mc.reserve_guard_branch() # has to be patched later on
self.pending_guard_tokens.append(token)
def emit_cond_call(self, op, arglocs, regalloc):
fcond = self.guard_success_cc
self.guard_success_cc = c.cond_none
assert fcond.value != c.cond_none.value
fcond = c.negate(fcond)
jmp_adr = self.mc.get_relative_pos()
self.mc.reserve_cond_jump() # patched later to a relative branch
# save away r2, r3, r4, r5, r11 into the jitframe
should_be_saved = [
reg for reg in self._regalloc.rm.reg_bindings.itervalues()
if reg in self._COND_CALL_SAVE_REGS
]
self._push_core_regs_to_jitframe(self.mc, should_be_saved)
# load gc map into unusual location: r0
self.load_gcmap(self.mc, r.SCRATCH2, regalloc.get_gcmap())
#
# load the 0-to-4 arguments into these registers, with the address of
# the function to call into r11
remap_frame_layout(self, arglocs, [r.r11, r.r2, r.r3, r.r4,
r.r5][:len(arglocs)], r.SCRATCH)
#
# figure out which variant of cond_call_slowpath to call, and call it
callee_only = False
floats = False
for reg in regalloc.rm.reg_bindings.values():
if reg not in regalloc.rm.save_around_call_regs:
break
else:
callee_only = True
if regalloc.fprm.reg_bindings:
floats = True
cond_call_adr = self.cond_call_slowpath[floats * 2 + callee_only]
self.mc.load_imm(r.r14, cond_call_adr)
self.mc.BASR(r.r14, r.r14)
# restoring the registers saved above, and doing pop_gcmap(), is left
# to the cond_call_slowpath helper. We never have any result value.
relative_target = self.mc.currpos() - jmp_adr
pmc = OverwritingBuilder(self.mc, jmp_adr, 1)
pmc.BRCL(fcond, l.imm(relative_target))
pmc.overwrite()
# might be overridden again to skip over the following
# guard_no_exception too
self.previous_cond_call_jcond = jmp_adr, fcond
def emit_cond_call(self, op, arglocs, regalloc):
fcond = self.guard_success_cc
self.guard_success_cc = c.cond_none
assert fcond.value != c.cond_none.value
fcond = c.negate(fcond)
jmp_adr = self.mc.get_relative_pos()
self.mc.reserve_cond_jump() # patched later to a relative branch
# save away r2, r3, r4, r5, r11 into the jitframe
should_be_saved = [
reg for reg in self._regalloc.rm.reg_bindings.itervalues()
if reg in self._COND_CALL_SAVE_REGS]
self._push_core_regs_to_jitframe(self.mc, should_be_saved)
# load gc map into unusual location: r0
self.load_gcmap(self.mc, r.SCRATCH2, regalloc.get_gcmap())
#
# load the 0-to-4 arguments into these registers, with the address of
# the function to call into r11
remap_frame_layout(self, arglocs,
[r.r11, r.r2, r.r3, r.r4, r.r5][:len(arglocs)],
r.SCRATCH)
#
# figure out which variant of cond_call_slowpath to call, and call it
callee_only = False
floats = False
for reg in regalloc.rm.reg_bindings.values():
if reg not in regalloc.rm.save_around_call_regs:
break
else:
callee_only = True
if regalloc.fprm.reg_bindings:
floats = True
cond_call_adr = self.cond_call_slowpath[floats * 2 + callee_only]
self.mc.load_imm(r.r14, cond_call_adr)
self.mc.BASR(r.r14, r.r14)
# restoring the registers saved above, and doing pop_gcmap(), is left
# to the cond_call_slowpath helper. We never have any result value.
relative_target = self.mc.currpos() - jmp_adr
pmc = OverwritingBuilder(self.mc, jmp_adr, 1)
pmc.BRCL(fcond, l.imm(relative_target))
pmc.overwrite()
# might be overridden again to skip over the following
# guard_no_exception too
self.previous_cond_call_jcond = jmp_adr, fcond
def emit_guard_false(self, op, arglocs, regalloc):
self.guard_success_cc = c.negate(self.guard_success_cc)
self._emit_guard(op, arglocs)
def emit_guard_false(self, op, arglocs, regalloc):
self.guard_success_cc = c.negate(self.guard_success_cc)
self._emit_guard(op, arglocs)
