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from rpython.jit.backend.zarch import conditions as c
from rpython.jit.backend.zarch import registers as r
from rpython.jit.backend.zarch import locations as l
from rpython.jit.backend.zarch.arch import STD_FRAME_SIZE_IN_BYTES
from rpython.jit.backend.zarch.instruction_builder import build_instr_codes
from rpython.jit.backend.llsupport.asmmemmgr import BlockBuilderMixin
from rpython.jit.backend.llsupport.assembler import GuardToken
from rpython.rlib.objectmodel import we_are_translated
from rpython.rlib.unroll import unrolling_iterable
from rpython.rtyper.lltypesystem import lltype, rffi, llmemory
from rpython.tool.udir import udir
from rpython.jit.backend.detect_cpu import autodetect
from rpython.jit.backend.zarch.arch import WORD
clear_cache = rffi.llexternal(
"__clear_cache",
[llmemory.Address, llmemory.Address],
lltype.Void,
_nowrapper=True,
sandboxsafe=True)
def binary_helper_call(name):
function = getattr(support, 'arm_%s' % name)
def f(self, c=c.AL):
"""Generates a call to a helper function, takes its
arguments in r0 and r1, result is placed in r0"""
addr = rffi.cast(lltype.Signed, function)
self.BL(addr, c)
return f
class ZARCHGuardToken(GuardToken):
def __init__(self, cpu, gcmap, descr, failargs, faillocs,
guard_opnum, frame_depth, faildescrindex, fcond=c.cond_none):
GuardToken.__init__(self, cpu, gcmap, descr, failargs, faillocs,
guard_opnum, frame_depth, faildescrindex)
self.fcond = fcond
class AbstractZARCHBuilder(object):
def write_i64(self, word):
self.writechar(chr((word >> 56) & 0xFF))
self.writechar(chr((word >> 48) & 0xFF))
self.writechar(chr((word >> 40) & 0xFF))
self.writechar(chr((word >> 32) & 0xFF))
self.writechar(chr((word >> 24) & 0xFF))
self.writechar(chr((word >> 16) & 0xFF))
self.writechar(chr((word >> 8) & 0xFF))
self.writechar(chr(word & 0xFF))
def write_i32(self, word):
self.writechar(chr((word >> 24) & 0xFF))
self.writechar(chr((word >> 16) & 0xFF))
self.writechar(chr((word >> 8) & 0xFF))
self.writechar(chr(word & 0xFF))
def write_i16(self, word):
self.writechar(chr((word >> 8) & 0xFF))
self.writechar(chr(word & 0xFF))
def write(self, bytestr):
for char in bytestr:
self.writechar(char)
build_instr_codes(AbstractZARCHBuilder)
class InstrBuilder(BlockBuilderMixin, AbstractZARCHBuilder):
RAW_CALL_REG = r.r14
def __init__(self, pool=None):
AbstractZARCHBuilder.__init__(self)
self.init_block_builder()
self.pool = pool
#
# ResOperation --> offset in the assembly.
# ops_offset[None] represents the beginning of the code after the last op
# (i.e., the tail of the loop)
self.ops_offset = {}
def mark_op(self, op):
pos = self.get_relative_pos()
self.ops_offset[op] = pos
def _dump_trace(self, addr, name, formatter=-1):
if not we_are_translated():
if formatter != -1:
name = name % formatter
dir = udir.ensure('asm', dir=True)
f = dir.join(name).open('wb')
data = rffi.cast(rffi.CCHARP, addr)
for i in range(self.currpos()):
f.write(data[i])
f.close()
def clear_cache(self, addr):
if we_are_translated():
startaddr = rffi.cast(llmemory.Address, addr)
endaddr = rffi.cast(llmemory.Address,
addr + self.get_relative_pos())
clear_cache(startaddr, endaddr)
def copy_to_raw_memory(self, addr):
self._copy_to_raw_memory(addr)
self.clear_cache(addr)
self._dump(addr, "jit-backend-dump", "s390x")
def load(self, treg, sreg, offset):
self.LG(treg, l.addr(offset, sreg))
def store(self, val, dst, off):
self.STG(val, l.addr(off, dst))
def store_update(self, valreg, treg, offset):
self.STG(valreg, l.addr(offset, treg))
def nop(self):
# if the mask is zero it act as a NOP
# there is no special 'no operation' instruction
self.BCR_rr(0x0, 0x0)
def currpos(self):
return self.get_relative_pos()
def b_abs(self, addr):
self.load_imm(r.r14, addr)
self.BCR(c.ANY, r.r14)
def b_cond_offset(self, offset, condition):
assert condition != c.cond_none
self.BRCL(condition, l.imm(offset))
def b_offset(self, reladdr):
offset = reladdr - self.get_relative_pos()
if -2**15 <= offset <= 2**15-1:
self.BRC(c.ANY, l.imm(offset))
else:
# we have big loops!
self.BRCL(c.ANY, l.imm(offset))
def reserve_guard_branch(self):
self.BRCL(l.imm(0x0), l.imm(0))
def trap(self):
self.TRAP2()
def trace(self):
self.LGHI(r.r2, l.imm(17))
self.XGR(r.r3, r.r3)
self.SVC(l.imm(17))
def cmp_op(self, a, b, pool=False, imm=False, signed=True, fp=False):
if fp == True:
if pool:
self.CDB(a, b)
else:
self.CDBR(a, b)
else:
if signed:
if pool:
# 64 bit immediate signed
self.CG(a, b)
elif imm:
self.CGFI(a, b)
else:
# 64 bit signed
self.CGR(a, b)
else:
if pool:
# 64 bit immediate unsigned
self.CLG(a, b)
elif imm:
self.CLGFI(a, b)
else:
# 64 bit unsigned
self.CLGR(a, b)
def load_imm(self, dest_reg, word):
if -2**15 <= word <= 2**15-1:
self.LGHI(dest_reg, l.imm(word))
elif -2**31 <= word <= 2**31-1:
self.LGFI(dest_reg, l.imm(word))
else:
if self.pool and self.pool.contains_constant(word):
self.LG(dest_reg, l.pool(self.pool.get_direct_offset(word)))
return
self.IILF(dest_reg, l.imm(word & 0xFFFFffff))
self.IIHF(dest_reg, l.imm((word >> 32) & 0xFFFFffff))
def load_imm_plus(self, dest_reg, word):
"""Like load_imm(), but with one instruction less, and
leaves the loaded value off by some signed 16-bit difference.
Returns that difference."""
diff = rffi.cast(lltype.Signed, rffi.cast(rffi.SHORT, word))
word -= diff
assert word & 0xFFFF == 0
self.load_imm(dest_reg, word)
return diff
def sync(self):
self.BCR_rr(0xf,0)
def raw_call(self, call_reg=r.r14):
"""Emit a call to the address stored in the register 'call_reg',
which must be either RAW_CALL_REG or r11. This is a regular C
function pointer, which means on big-endian that it is actually
the address of a three-words descriptor.
"""
self.BASR(r.r14, call_reg)
def reserve_cond_jump(self, short=False):
self.trap() # conditional jump, patched later
self.trap()
if not short:
# 6 bytes instead of 2
self.trap()
def branch_absolute(self, addr):
self.load_imm(r.r14, addr)
self.BASR(r.r14, r.r14)
def store_link(self):
self.STMG(r.r14, r.r15, l.addr(14*WORD, r.SP))
def restore_link(self):
off = STD_FRAME_SIZE_IN_BYTES
self.LMG(r.r14, r.r15, l.addr(off+14*WORD, r.SP))
def push_std_frame(self, additional_bytes=0):
off = (STD_FRAME_SIZE_IN_BYTES + additional_bytes)
self.STG(r.SP, l.addr(-off, r.SP))
self.LAY(r.SP, l.addr(-off, r.SP))
def pop_std_frame(self, additional_bytes=0):
self.LAY(r.SP, l.addr(STD_FRAME_SIZE_IN_BYTES + additional_bytes, r.SP))
def get_assembler_function(self):
"NOT_RPYTHON: tests only"
from rpython.jit.backend.llsupport.asmmemmgr import AsmMemoryManager
class FakeCPU:
HAS_CODEMAP = False
asmmemmgr = AsmMemoryManager()
addr = self.materialize(FakeCPU(), [])
return rffi.cast(lltype.Ptr(lltype.FuncType([], lltype.Signed)), addr)
class OverwritingBuilder(BlockBuilderMixin, AbstractZARCHBuilder):
def __init__(self, mc, start, num_insts=0):
AbstractZARCHBuilder.__init__(self)
self.init_block_builder()
self.mc = mc
self.index = start
def writechar(self, c):
self.mc.overwrite(self.index, c)
self.index += 1
def overwrite(self):
pass
_classes = (AbstractZARCHBuilder,)
# Used to build the MachineCodeBlockWrapper
all_instructions = sorted([name for cls in _classes for name in cls.__dict__ \
if name.split('_')[0].isupper() and '_' in name and \
not name.endswith('_byte_count')])
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