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Author SHA1 Message Date
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
ketank-new
4853da820a Added test example for RXE mode 2016-12-21 18:43:25 +05:30
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
419869b20e Fixes for DynASM. 
* s/hle/nle/
 * Fix RRF-b encoding (didbr instruction)
 2016-12-20 14:53:31 -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
5076a3ee2e Fix some DynASM instructions. 2016-12-20 09:27:40 -05:00
niravthakkar
28b6fe8759 Updated encoding for instructions 
Have replaced the characters used for encoding with their respective addressing modes
 2016-12-20 17:50:29 +05:30
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
Michael Munday
299dc34db2 Add basic integer for loop support. 
> for i=1,3 do print(i) end
1
2
3
 2016-12-19 14:21:48 -05:00
Michael Munday
0d442ec688 Add some more instructions to DynASM. 2016-12-19 14:21:24 -05:00
Michael Munday
3330f6adc2 Fix KSHORT destination slot address. 2016-12-19 10:49:21 -05:00
Michael Munday
6a9855d988 Add support for print function call. 
Hello world now works.

> print("hello world!")
hello world!
 2016-12-17 19:56:56 -05:00
Michael Munday
bee112d431 Add support for global short assignments. 
In other words 'a = 1' now works.
 2016-12-16 17:23:46 -05:00
Michael Munday
24bdb7576d Add debug options to Makefile. 
We're going to need these for a while, so better to put in the
repository. Once we're happy things are working we can disable
the debug info and enable optimizations again.
 2016-12-15 11:03:13 -05:00
Michael Munday
2dcbf5be3e Implement more functions in the VM. 
Also adds segmentation faults to stubbed out functions to make it
easier to work out what the control flow is.
 2016-12-15 11:01:59 -05:00
ketank-new
b7c4e4b3d6 Added rre instruction format example 
example includes instruction fidr
 2016-12-15 13:51:46 +05:30
Michael Munday
ee4b942c94 Add vm_call handling code. 
Now prints the prompt (!).
 2016-12-14 22:22:49 -05:00
Michael Munday
f79a6f3f0b Add support for clm instruction. 2016-12-14 21:16:30 -05:00
Michael Munday
24f2ab48f5 Various fixes for vm_s390x.dasc. 2016-12-14 18:43:21 -05:00
Michael Munday
00d00e995f Fix extern handling in host vm builder. 2016-12-14 16:31:52 -05:00
Michael Munday
ef3ff100f2 Fix decoding of REL_EXT. 
REL_EXT has an argument which wasn't being properly jumped,
resulting in an early STOP (because the argument is 0).
 2016-12-14 16:27:38 -05:00
niravthakkar
49182c4d2e Added test for RRD and RRF-e 
Also have modified the function which can handle 3 arguments now
 2016-12-14 19:14:10 +05:30
niravthakkar
d63ff89c54 Added support for RRD addressing mode 
We may not require RRD mode but, Added to check working of RRF-e.
 2016-12-14 19:07:05 +05:30
niravthakkar
df7c3245e0 Minor Fix, correct the parameter used 
Instead of params[2] , params[1] was used, corrected it.
 2016-12-14 17:45:32 +05:30
niravthakkar
52368ac005 Minor cleanup 2016-12-14 14:47:15 +05:30
niravthakkar
ccd2614902 Added support for RIE-e, RSI, RXF, SI instructions 2016-12-14 14:18:07 +05:30
niravthakkar
f01f459573 Added support for RIL-c and RX-b instructions 2016-12-14 13:51:58 +05:30
niravthakkar
a8244c02ec Added support for RI-b and RI-c mode instructions 2016-12-14 13:41:55 +05:30