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75 Commits

Author SHA1 Message Date
Michael Munday
a3501b062d Various fixes for coroutines. 
Now passing the tests.
 2017-01-05 23:39:25 -05:00
Michael Munday
d90293f55e Implement coroutines. 
TODO: delete LREG, caused problems while implementing this (x64
doesn't have LREG).
 2017-01-05 23:39:25 -05:00
Michael Munday
60fb35cb68 Implement rawget. 2017-01-05 23:39:25 -05:00
Michael Munday
1b16e7ce3c Fix math.pow. 
The second floating point argument is placed into f2, not f1.
Use the macros FARG{1,2} instead of using the registers directly.
 2017-01-05 10:52:27 -05:00
Michael Munday
dfb95646f8 Implement call_tail. 2017-01-04 16:05:55 -05:00
Michael Munday
faef0fb092 Fix for __newindex metamethod. 2017-01-04 15:54:21 -05:00
Michael Munday
80191dcab7 Implement cont_cat. 
Required to pass cat tests.
 2017-01-04 15:34:30 -05:00
Michael Munday
e598c067c3 Fixes for negative string.sub arguments and __index metamethod calls. 2017-01-04 14:50:19 -05:00
Michael Munday
705784a4f9 Implement math.min and math.max. 
Replicates the standard Lua behaviour in the presence of NaNs.
 2017-01-04 11:48:07 -05:00
Michael Munday
86e5e57f4c Add emptystr implementation and stub out co-routine functions. 2017-01-03 16:44:36 -05:00
Michael Munday
e739ffedce Implement string.byte and string.char. 2017-01-03 16:36:34 -05:00
Michael Munday
65af21e2ed Implement more math functions. 
Everything apart from min/max should now be working.
 2017-01-03 16:12:22 -05:00
Michael Munday
8e747c5406 Implement metamethod support. 
Allows metamethod tables to be get and set.
 2017-01-03 12:17:34 -05:00
niravthakkar
d02e076507 Minor fix, for arguments in shift operations 2017-01-03 15:55:25 +05:30
Michael Munday
39c37a1a1a Remove debug code from tostring. 2016-12-30 16:33:35 -05:00
Michael Munday
4f1c4dc514 Implement pairs (including ISNEXT and ITERN). 
Allows use of the pairs iterator, for example:

t = { alpha = 1, beta = 2 }
for k,v in pairs(t)
  print(k, v)
end

-- prints:
-- alpha	1
-- beta	2
 2016-12-30 14:51:30 -05:00
Michael Munday
6fbe356507 Implement USETN, USETP and USETS. 
Allows constant numbers, primitives (nil, true, false) and strings
to be assigned to upvalues in closures.
 2016-12-30 13:33:31 -05:00
Michael Munday
a5d9604419 Implement USETV. 
Allows upvalues to be set in closures, for example:

function f(x)
  local y = x
  local j = function(z)
    y = y + z
  end
  for i=1,3 do
    j(i)
    print(y)
  end
end

f(2) -- prints: 3 5 8
 2016-12-30 13:00:38 -05:00
Michael Munday
21073df0dc Add FORL implementation (just fallthrough). 2016-12-30 12:27:08 -05:00
Michael Munday
5e7121c625 Implement ipairs. 
Allows the use of the ipairs iterator, for example:

t = { "i", "robot" }
for i,v in ipairs(t) do
  print(i, v)
end
-- prints:
-- 1	i
-- 2	robot
 2016-12-30 11:40:39 -05:00
Michael Munday
21f2fdfab2 Partially implement ipairs. 
Still need to handle ipairs_aux.
 2016-12-29 17:37:11 -05:00
Michael Munday
e6eb12b268 Implement bit operations. 
See http://bitop.luajit.org/api.html for more information.

Bytecode listing is now supported, for example:

$ ./luajit -bl -e 'a=1'
-- BYTECODE -- "a=1":0-1
0001    KSHORT   0   1
0002    GSET     0   0      ; "a"
0003    RET0     0   1
 2016-12-29 15:07:51 -05:00
Michael Munday
e8ca7b8799 Implement CAT. 
Allows the use of the '..' operator, for example:

x = "hello"
y = " "
z = "world!"
print(x..y..z) -- prints 'hello world!'
 2016-12-29 11:23:45 -05:00
Michael Munday
29223bb979 Implement POW. 
Allows use of the '^' operator, for example:

x = 2
y = 3
print(x ^ y) -- prints 8
 2016-12-29 11:10:18 -05:00
Michael Munday
230a4aa424 Implement KNIL and CALLMT. 2016-12-28 17:55:10 -05:00
Michael Munday
2584c6d5a8 Implement ISNUM, ISTYPE, TGETR and TSETR. 2016-12-28 17:01:09 -05:00
Michael Munday
5dc644ad89 Implement LOOP. 
Allows for while and repeat loops, for example:

x = 0
while x < 5 do
  print(x)
  x = x + 1
end

-- prints:
-- 0
-- 1
-- 2
-- 3
-- 4
 2016-12-28 14:13:08 -05:00
Michael Munday
6673652fd9 Implement TSETM and VARG. 
Allows varargs to be used, for example:

function sel(n, ...)
  local arg = {...}
  return arg[n]
end

print(sel(2, 3, 4, 5)) -- prints 4
 2016-12-28 13:21:06 -05:00
Michael Munday
aba9cfb2a8 Implement UGET. 
Allows simple closures, for example:

function f(x)
  return function() return x end
end

y = f(1)
print(y()) -- prints 1
 2016-12-28 10:58:45 -05:00
Michael Munday
354b5c748b Implement a UCLO, ff_assert and a couple of other bits. 
Needed to get -bl working, still more to do though.
 2016-12-22 15:40:25 -05:00
Michael Munday
077ccc8658 Implement LEN. 
Enables length of tables and strings to be taken, for example:

t = "hello"
print(#t) -- prints 5
t = {1,2}
print(#t) -- prints 2
 2016-12-22 14:59:37 -05:00
Michael Munday
c0c155e45e Implement/fix TGETS and TSETS. 
Allows string keys in tables, for example:

t = {}
t["hello"] = 1
print(t["hello"]) -- prints 1
 2016-12-22 14:40:31 -05:00
Michael Munday
cab03375f1 Implement TGETV and TSETV. 
Allows table entries to be get and set using variables, for example:

t = {4,5}
i = 1
print(t[i]) -- prints 4
t[i] = 3
print(t[i]) -- prints 3
 2016-12-22 14:20:47 -05:00
Michael Munday
20f05a4e20 Implement more tset and tget metamethods. 
This allows table entries to be get and set even if they don't
already exist, for example:

t = {}
print(t[1]) -- prints nil
t[1] = 3
print(t[1]) -- prints 3
 2016-12-22 13:50:59 -05:00
Michael Munday
01dbd6dfa2 Implement TDUP, TGETB and TSETB. 
Allows some simple table operations, for example:

t = {1, 2}
print(t[1]) -- prints 1
t[1] = 3
print(t[1]) -- prints 3
 2016-12-22 13:16:02 -05:00
Michael Munday
6fc4c0c1a8 Fix BC_MCALL 
RC and RD are the same register on x64, so sometimes it uses them
interchangeably. Probably we should make them the same register
on s390x, but that would involve changing the instruction decode
code which I would rather leave until we have a test suite passing.
 2016-12-22 12:41:00 -05:00
Michael Munday
1825037538 Implement table creation and printing. 2016-12-21 18:02:43 -05:00
Michael Munday
e19544ae9a Implement unary minus. 2016-12-21 14:03:58 -05:00
Michael Munday
9da6ff7ea3 Implement more equality checks. 2016-12-21 13:21:12 -05:00
Michael Munday
8518df8e56 Implement some boolean operations. 2016-12-21 12:49:53 -05:00
Michael Munday
ae38a6913e Add support for numeric equality checks. 2016-12-21 11:02:53 -05:00
Michael Munday
b5aa0d077c Fix bug in division. 2016-12-20 17:26:33 -05:00
Michael Munday
eda56c9a44 Add support for if statements. 2016-12-20 17:10:38 -05:00
Michael Munday
90334d3be9 Add support for function definitions. 2016-12-20 15:49:21 -05:00
Michael Munday
e0e98f94d3 Add support for modulo (%) operations. 
Only the slow path for now.
 2016-12-20 14:54:26 -05:00
Michael Munday
d006b07127 Add support for division. 2016-12-20 13:37:42 -05:00
Michael Munday
d94f4ac079 Add support for multiplication. 
Multiplication instructions don't set the overflow flag so we need
to manually check, which is why this is more complicated than
addition.
 2016-12-20 13:14:53 -05:00
Michael Munday
d256d99659 Add support for floating point add/sub. 2016-12-20 12:09:32 -05:00
Michael Munday
5df5e1f144 Add support for integer add/subtract. 
Still need to support floating point operations. Multiplication is a
little more complicated because it doesn't set the overflow flag.
 2016-12-20 09:41:19 -05:00
Michael Munday
e467d784a9 Fix floating point fallback code for for loops. 
Adds a dependency on clfi. Not sure how to work around (don't
really want to always introduce a temporary).
 2016-12-19 16:03:21 -05:00