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import random
import py
from rpython.jit.backend.arm.registers import *
from rpython.jit.backend.arm.locations import *
from rpython.jit.backend.arm.regalloc import ARMFrameManager
from rpython.jit.backend.arm.jump import remap_frame_layout, remap_frame_layout_mixed
from rpython.jit.metainterp.history import INT
fm = ARMFrameManager(0)
frame_pos = fm.frame_pos
class MockAssembler:
def __init__(self):
self.ops = []
def regalloc_mov(self, from_loc, to_loc):
self.ops.append(('mov', from_loc, to_loc))
def regalloc_push(self, loc):
self.ops.append(('push', loc))
def regalloc_pop(self, loc):
self.ops.append(('pop', loc))
def got(self, expected):
print '------------------------ comparing ---------------------------'
for op1, op2 in zip(self.ops, expected):
print '%-38s| %-38s' % (op1, op2)
if op1 == op2:
continue
assert len(op1) == len(op2)
for x, y in zip(op1, op2):
if isinstance(x, StackLoc) and isinstance(y, MODRM):
assert x.byte == y.byte
assert x.extradata == y.extradata
else:
assert x == y
assert len(self.ops) == len(expected)
return True
class TestJump(object):
def setup_method(self, m):
self.assembler = MockAssembler()
def test_trivial(self):
remap_frame_layout(self.assembler, [], [], '?')
assert self.assembler.ops == []
remap_frame_layout(self.assembler, [r0, r1, r3, r5, r6, r7, r9],
[r0, r1, r3, r5, r6, r7, r9], '?')
assert self.assembler.ops == []
s8 = frame_pos(1, INT)
s12 = frame_pos(31, INT)
s20 = frame_pos(6, INT)
remap_frame_layout(self.assembler, [r0, r1, s20, s8, r3, r5, r6, s12, r7, r9],
[r0, r1, s20, s8, r3, r5, r6, s12, r7, r9],
'?')
assert self.assembler.ops == []
def test_simple_registers(self):
remap_frame_layout(self.assembler, [r0, r1, r2], [r3, r4, r5], '?')
assert self.assembler.ops == [('mov', r0, r3),
('mov', r1, r4),
('mov', r2, r5)]
def test_simple_framelocs(self):
s8 = frame_pos(0, INT)
s12 = frame_pos(13, INT)
s20 = frame_pos(20, INT)
s24 = frame_pos(221, INT)
remap_frame_layout(self.assembler, [s8, r7, s12], [s20, s24, r9], ip)
assert self.assembler.ops == [('mov', s8, ip),
('mov', ip, s20),
('mov', r7, s24),
('mov', s12, r9)]
def test_reordering(self):
s8 = frame_pos(8, INT)
s12 = frame_pos(12, INT)
s20 = frame_pos(19, INT)
s24 = frame_pos(1, INT)
remap_frame_layout(self.assembler, [r7, s8, s20, r4],
[s8, r4, r7, r2], '?')
assert self.assembler.got([('mov', r4, r2),
('mov', s8, r4),
('mov', r7, s8),
('mov', s20, r7)])
def test_cycle(self):
s8 = frame_pos(8, INT)
s12 = frame_pos(12, INT)
s20 = frame_pos(19, INT)
s24 = frame_pos(1, INT)
remap_frame_layout(self.assembler, [r4, s8, s20, r7],
[s8, r7, r4, s20], '?')
assert self.assembler.got([('push', s8),
('mov', r4, s8),
('mov', s20, r4),
('mov', r7, s20),
('pop', r7)])
def test_cycle_2(self):
s8 = frame_pos(8, INT)
s12 = frame_pos(12, INT)
s20 = frame_pos(19, INT)
s24 = frame_pos(1, INT)
s2 = frame_pos(2, INT)
s3 = frame_pos(3, INT)
remap_frame_layout(self.assembler,
[r0, s8, r1, s20, r0, s20, s24, r3, s2, s3],
[s8, s20, r1, r0, r4, s24, r5, s12, s3, s2],
ip)
assert self.assembler.got([('mov', r0, r4),
('mov', s24, r5),
('mov', r3, s12),
('mov', s20, ip),
('mov', ip, s24),
('push', s8),
('mov', r0, s8),
('mov', s20, r0),
('pop', s20),
('push', s3),
('mov', s2, ip),
('mov', ip, s3),
('pop', s2)])
def test_constants(self):
c3 = ImmLocation(3)
remap_frame_layout(self.assembler, [c3], [r0], '?')
assert self.assembler.ops == [('mov', c3, r0)]
def test_constants2(self):
c3 = ImmLocation(3)
s12 = frame_pos(12, INT)
remap_frame_layout(self.assembler, [c3], [s12], '?')
assert self.assembler.ops == [('mov', c3, s12)]
def test_constants_and_cycle(self):
c3 = ImmLocation(3)
s12 = frame_pos(13, INT)
remap_frame_layout(self.assembler, [r5, c3, s12],
[s12, r0, r5], r1)
assert self.assembler.ops == [('mov', c3, r0),
('push', s12),
('mov', r5, s12),
('pop', r5)]
def test_mixed(self):
s23 = frame_pos(2, FLOAT) # non-conflicting locations
s4 = frame_pos(4, INT)
remap_frame_layout_mixed(self.assembler, [r1], [s4], 'tmp',
[s23], [d5], 'vfptmp')
assert self.assembler.ops == [('mov', r1, s4),
('mov', s23, d5)]
def test_mixed2(self):
s23 = frame_pos(2, FLOAT) # gets stored in pos 2 and 3, with value==3
s3 = frame_pos(3, INT)
remap_frame_layout_mixed(self.assembler, [r1], [s3], 'tmp',
[s23], [d5], 'vfptmp')
assert self.assembler.ops == [('push', s23),
('mov', r1, s3),
('pop', d5)]
def test_mixed3(self):
s23 = frame_pos(2, FLOAT)
s2 = frame_pos(2, INT)
remap_frame_layout_mixed(self.assembler, [r1], [s2], 'tmp',
[s23], [d5], 'vfptmp')
assert self.assembler.ops == [
('push', s23),
('mov', r1, s2),
('pop', d5)]
def test_mixed4(self):
s23 = frame_pos(2, FLOAT)
s4 = frame_pos(4, INT)
s45 = frame_pos(4, FLOAT)
s1 = frame_pos(1, INT)
remap_frame_layout_mixed(self.assembler, [s4], [s1], r3,
[s23], [s45], d3)
assert self.assembler.ops == [('mov', s4, r3),
('mov', r3, s1),
('mov', s23, d3),
('mov', d3, s45)]
def test_mixed5(self):
s2 = frame_pos(2, INT)
s23 = frame_pos(2, FLOAT)
s4 = frame_pos(4, INT)
s45 = frame_pos(4, FLOAT)
remap_frame_layout_mixed(self.assembler, [s4], [s2], r3,
[s23], [s45], d3)
assert self.assembler.ops == [('push', s23),
('mov', s4, r3),
('mov', r3, s2),
('pop', s45)]
def test_mixed6(self):
s3 = frame_pos(3, INT)
s23 = frame_pos(2, FLOAT)
s4 = frame_pos(4, INT)
s45 = frame_pos(4, FLOAT)
remap_frame_layout_mixed(self.assembler, [s4], [s3], r3,
[s23], [s45], d3)
assert self.assembler.ops == [('push', s23),
('mov', s4, r3),
('mov', r3, s3),
('pop', s45)]
def test_random_mixed():
assembler = MockAssembler()
registers1 = all_regs
registers2 = all_vfp_regs
VFPWORDS = 2
#
def pick1():
n = random.randrange(-3, 10)
if n < 0:
return registers1[n]
else:
return frame_pos(n, INT)
def pick2():
n = random.randrange(-3 , 10 // VFPWORDS)
if n < 0:
return registers2[n]
else:
return frame_pos(n*VFPWORDS, FLOAT)
#
def pick1c():
n = random.randrange(-2000, 500)
if n >= 0:
return imm(n)
else:
return pick1()
#
def pick_dst(fn, count, seen):
result = []
while len(result) < count:
x = fn()
keys = [x.as_key()]
if x.is_stack() and x.width > WORD:
keys.append(keys[0] + 1)
for key in keys:
if key in seen:
break
else:
for key in keys:
seen[key] = True
result.append(x)
return result
#
def get_state(locations):
regs1 = {}
regs2 = {}
stack = {}
for i, loc in enumerate(locations):
if loc.is_vfp_reg():
if loc.width > WORD:
newvalue = ('value-vfp-%d' % i,
'value-vfp-hiword-%d' % i)
else:
newvalue = 'value-vfp-%d' % i
regs2[loc.value] = newvalue
elif loc.is_core_reg():
regs1[loc.value] = 'value-int-%d' % i
elif loc.is_stack():
stack[loc.position] = 'value-width%d-%d' % (loc.width, i)
if loc.width > WORD:
stack[loc.position+1] = 'value-hiword-%d' % i
else:
assert loc.is_imm() or loc.is_imm_float()
return regs1, regs2, stack
#
for i in range(500):
seen = {}
src_locations2 = [pick2() for i in range(4)]
dst_locations2 = pick_dst(pick2, 4, seen)
src_locations1 = [pick1c() for i in range(5)]
dst_locations1 = pick_dst(pick1, 5, seen)
assembler = MockAssembler()
remap_frame_layout_mixed(assembler,
src_locations1, dst_locations1, ip,
src_locations2, dst_locations2, vfp_ip)
#
regs1, regs2, stack = get_state(src_locations1 +
src_locations2)
#
def read(loc, expected_width=None):
if expected_width is not None:
assert loc.width == expected_width*WORD
if loc.is_vfp_reg():
return regs2[loc.value]
elif loc.is_core_reg():
return regs1[loc.value]
elif loc.is_stack():
got = stack[loc.position]
if loc.width > WORD:
got = (got, stack[loc.position+1])
return got
if loc.is_imm() or loc.is_imm_float():
return 'const-%d' % loc.value
assert 0, loc
#
def write(loc, newvalue):
if loc.is_vfp_reg():
regs2[loc.value] = newvalue
elif loc.is_core_reg():
regs1[loc.value] = newvalue
elif loc.is_stack():
if loc.width > WORD:
newval1, newval2 = newvalue
stack[loc.position] = newval1
stack[loc.position+1] = newval2
else:
stack[loc.position] = newvalue
else:
assert 0, loc
#
src_values1 = [read(loc, 1) for loc in src_locations1]
src_values2 = [read(loc, 2) for loc in src_locations2]
#
extrapushes = []
for op in assembler.ops:
if op[0] == 'mov':
src, dst = op[1:]
assert src.is_core_reg() or src.is_vfp_reg() or src.is_stack() or src.is_imm_float() or src.is_imm()
assert dst.is_core_reg() or dst.is_vfp_reg() or dst.is_stack()
assert not (src.is_stack() and dst.is_stack())
write(dst, read(src))
elif op[0] == 'push':
src, = op[1:]
assert src.is_core_reg() or src.is_vfp_reg() or src.is_stack()
extrapushes.append(read(src))
elif op[0] == 'pop':
dst, = op[1:]
assert dst.is_core_reg() or dst.is_vfp_reg() or dst.is_stack()
write(dst, extrapushes.pop())
else:
assert 0, "unknown op: %r" % (op,)
assert not extrapushes
#
for i, loc in enumerate(dst_locations1):
assert read(loc, 1) == src_values1[i]
for i, loc in enumerate(dst_locations2):
assert read(loc, 2) == src_values2[i]
|
