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import py
import random, sys, os
from rpython.jit.backend.ppc.codebuilder import BasicPPCAssembler, PPCBuilder
from rpython.jit.backend.ppc.regname import *
from rpython.jit.backend.ppc.register import *
from rpython.jit.backend.ppc import form
from rpython.jit.backend import detect_cpu
from rpython.jit.backend.ppc.arch import IS_PPC_32, IS_PPC_64, IS_BIG_ENDIAN
from rpython.jit.backend.ppc.arch import WORD
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rtyper.annlowlevel import llhelper
cpu = detect_cpu.autodetect()
class TestDisassemble(object):
def test_match(self):
class A(BasicPPCAssembler):
insts = []
a = A()
a.add(1, 2, 3)
inst = a.insts[-1]
assert A.add.match(inst.assemble())
"""
Creates the boilerplate code for the tests.
- Make a PPCBuilder object
- Let the given test create the machine code
- Create a function and call it
- Compare the return value with the expected result
"""
def asmtest(expected):
def testmaker(test):
def newtest(self):
a = PPCBuilder()
test(self, a)
f = a.get_assembler_function()
assert f() == expected
return newtest
return testmaker
"""
Treats the given bitstring as binary representation
of an integer in two's complement.
"""
def bits_to_signed_int(bits):
assert len(bits) > 0
sign = 1
if bits[0] == "1":
sign = -1
bits = bits[1:].replace("0", "$").replace("1", "0").replace("$", "1")
return sign * (int(bits, 2) + 1)
def hex_to_signed_int(hx):
return bits_to_signed_int(bin(int(hx, 16))[2:])
# Testing simple assembler instructions
class TestAssemble(object):
def setup_class(cls):
if cpu not in ["ppc", "ppc64", "ppc-64"]:
py.test.skip("can't test all of ppcgen on non-PPC!")
#py.test.xfail("assemble does not return a function any longer, fix tests")
"""
Tests are build like this:
@asmtest(expected=<EXPECTED RESULT>)
def testX(self, assembler):
<Assembler Code>
This is equivalent to:
def testX(self):
assembler = MyPPCAssembler()
<Assembler Code>
f = assembler.assemble()
assert f() == <EXPECTED RESULT>
"""
@asmtest(expected=200)
def test_li(self, a):
a.li(3, 200)
a.blr()
@asmtest(expected=7)
def test_add_imm(self, a):
a.li(3, 6)
a.addi(3, 3, 1)
a.blr()
@asmtest(expected=12341234)
def test_load_imm(self, a):
a.load_imm(r10, 12341234)
a.mtctr(10)
a.mfctr(11)
a.mr(3, 11)
a.blr()
@asmtest(expected=33333333)
def test_add_reg(self, a):
a.load_imm(r10, 11111111)
a.load_imm(r11, 22222222)
a.add(12, 10, 11)
a.mr(3, 12)
a.blr()
@asmtest(expected=-1000)
def test_add_pos_and_neg(self, a):
a.load_imm(r10, 2000)
a.load_imm(r11, -3000)
a.add(3, 10, 11)
a.blr()
@asmtest(expected=7)
def test_sub_imm(self, a):
a.li(3, 10)
a.subi(3, 3, 3)
a.blr()
@asmtest(expected=(123435 - 76457))
def test_sub_reg(self, a):
a.load_imm(r5, 123435)
a.load_imm(r6, 76457)
a.sub(3, 5, 6)
a.blr()
@asmtest(expected=(10000 * 5000))
def test_mul_imm(self, a):
a.load_imm(r3, 10000)
a.mulli(3, 3, 5000)
a.blr()
# 1000000 * 1000000 = 0b1110100011010100101001010001000000000000
# expect: r3 = -HWORD-|11010100101001010001000000000000
@asmtest(expected=bits_to_signed_int('11010100101001010001000000000000'))
def test_mullw(self, a):
word = 1000000
a.load_imm(r5, word)
a.load_imm(r6, word)
a.mullw(3, 5, 6)
if IS_PPC_64:
a.extsw(3, 3)
a.blr()
# 1000000 * 1000000 = 0b1110100011010100101001010001000000000000
# expect: r3 = 11101000|------------LWORD--------------
@asmtest(expected=int('11101000', 2))
def test_mulhw(self, a):
word = 1000000
a.load_imm(r5, word)
a.load_imm(r6, word)
a.mulhw(3, 5, 6)
if IS_PPC_64:
a.extsw(3, 3)
a.blr()
# 1000000 * 1000000 = 0b1110100011010100101001010001000000000000
# expect: r3 = 11101000|------------LWORD--------------
@asmtest(expected=int('11101000', 2))
def test_mulhwu(self, a):
word = 1000000
a.load_imm(r5, word)
a.load_imm(r6, word)
a.mulhwu(3, 5, 6)
if IS_PPC_64:
a.extsw(3, 3)
a.blr()
@asmtest(expected=10000)
def test_divw(self, a):
divident = 1000000
divisor = 100
a.load_imm(r10, divident)
a.load_imm(r11, divisor)
a.divw(3, 10, 11)
a.blr()
def test_call_function(self):
functype = lltype.Ptr(lltype.FuncType([lltype.Signed], lltype.Signed))
call_addr = rffi.cast(lltype.Signed, llhelper(functype, func))
a = PPCBuilder()
# NOW EXPLICITLY:
#
# - Load the address of the function to call into a register x
# - Move the content of this register x into CTR
# - Set the LR manually (or with bctrl)
# - Do jump
a.li(3, 50)
if IS_PPC_32:
a.load_imm(r10, call_addr)
elif IS_BIG_ENDIAN:
# load the 3-words descriptor
a.load_from_addr(r10, SCRATCH2, call_addr)
a.load_from_addr(r2, SCRATCH2, call_addr+WORD)
a.load_from_addr(r11, SCRATCH2, call_addr+2*WORD)
else:
# no descriptor on little-endian, but the ABI says r12 must
# contain the function pointer
a.load_imm(r10, call_addr)
a.mr(12, 10)
a.mtctr(10)
a.bctr()
a.blr()
f = a.get_assembler_function()
assert f() == 65
@asmtest(expected=0)
def test_and(self, a):
a.load_imm(r10, 8)
a.load_imm(r11, 7)
a.and_(3, 10, 11)
a.blr()
@asmtest(expected=15)
def test_or(self, a):
a.load_imm(r10, 8)
a.load_imm(r11, 7)
a.or_(3, 10, 11)
a.blr()
@asmtest(expected=15)
def test_nand(self, a):
a.load_imm(r10, 8)
a.load_imm(r11, 7)
a.nand(3, 10, 11)
a.load_imm(r12, 0x0000000F) # zero out first 28 bits
a.and_(3, 3, 12) #
a.blr()
@asmtest(expected=1)
def test_nor(self, a):
a.load_imm(r10, 10)
a.load_imm(r11, 6)
a.nor(3, 10, 11)
a.load_imm(r12, 0x0000000F) # zero out first 28 bits
a.and_(3, 3, 12) #
a.blr()
@asmtest(expected=5)
def test_xor(self, a):
a.load_imm(r10, 15)
a.load_imm(r11, 10)
a.xor(3, 10, 11)
a.blr()
@asmtest(expected=0x120)
def test_slw(self, a):
a.load_imm(r10, 9)
a.load_imm(r11, 5)
a.slw(3, 10, 11)
a.blr()
@asmtest(expected=9)
def test_srw(self, a):
a.load_imm(r10, 0x120)
a.load_imm(r11, 5)
a.srw(3, 10, 11)
a.blr()
def test_neg(self):
a = PPCBuilder()
a.load_imm(r10, 0x0000F0F0)
a.neg(3, 10)
a.blr()
f = a.get_assembler_function()
assert f() == hex_to_signed_int("FFFF0F10")
def test_load_and_store(self):
a = PPCBuilder()
word1 = 1000
word2 = 2000
p = lltype.malloc(rffi.CArray(lltype.Signed), 2, flavor="raw")
a.load_imm(r10, word1)
a.load_imm(r11, word2)
a.load_imm(r8, rffi.cast(lltype.Signed, p))
a.load_imm(r9, rffi.cast(lltype.Signed, p) + WORD)
a.stw(10, 8, 0)
a.stw(11, 9, 0)
a.lwz(4, 8, 0)
a.lwz(5, 9, 0)
a.add(3, 4, 5)
a.blr()
f = a.get_assembler_function()
assert f() == word1 + word2
lltype.free(p, flavor="raw")
def test_load_from(self):
a = PPCBuilder()
p = lltype.malloc(rffi.CArray(rffi.LONG), 1, flavor="raw")
addr = rffi.cast(lltype.Signed, p)
p[0] = rffi.cast(rffi.LONG, 200)
a.load_from_addr(r3, SCRATCH2, addr)
a.blr()
f = a.get_assembler_function()
assert f() == 200
p[0] = rffi.cast(rffi.LONG, 300)
assert f() == 300
lltype.free(p, flavor="raw")
def func(arg):
return arg + 15
def is_64_bit_arch():
import sys
return sys.maxint == 9223372036854775807
|
