rubyx/test/test_crystal.rb
2014-04-17 14:43:52 +03:00

49 lines
1.5 KiB
Ruby

require_relative 'helper'
require "asm/arm/code_generator"
# try to test that the generation of basic instructions works
# one instruction at a time, reverse testing from objdump --demangle -Sfghxp
# tests are named as per assembler code, ie test_mov testing mov instruction
class TestArmAsm < MiniTest::Test
# need a code generator, for arm
def setup
@generator = Asm::Arm::CodeGenerator.new
end
# code is what the generator spits out, at least one instruction worth (.first)
# the op code is wat was witten as assembler in the first place and the binary result
# is reversed and in 4 bytes as ruby can only do 31 bits and so we can't test with just one int (?)
def assert_code code , op , should
assert_equal op , code.opcode
binary = @generator.assemble
assert_equal 4 , binary.length
index = 0
binary.each_byte do |byte |
assert_equal should[index] , byte
index += 1
end
end
def test_mov
code = @generator.instance_eval { mov r0, 5 }.first
assert_code code , :mov , [0x05,0x00,0xa0,0xe3]
assert ! code.affect_status #no s at the end, silly for mov anyway
end
def test_sub
code = @generator.instance_eval { subs r2, r0, 1 }.first
assert_code code, :sub , [0x01,0x20,0x50,0xe2]
assert code.affect_status #the s at the end
end
def saved_other
@generator.instance_eval do
mov r0, 5
loop_start = label
loop_start.set!
subs r0, r0, 1
bne loop_start
bx lr
end
end
end