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6fc4c0c1a8
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40 Commits

Author SHA1 Message Date
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
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
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
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
Michael Munday
ee4b942c94 Add vm_call handling code. 
Now prints the prompt (!).
 2016-12-14 22:22:49 -05:00
Michael Munday
24f2ab48f5 Various fixes for vm_s390x.dasc. 2016-12-14 18:43:21 -05:00
Michael Munday
7644f40b1a Add more interpreter code. 
Compilation is currently broken, a label is missing.
 2016-12-13 18:31:43 -05:00
Michael Munday
0b120ac64b Add partial implementation of vm_cpcall. 
Currently works if the call returns 0. Haven't yet written the code
needed to handle the non-zero case.
 2016-12-12 17:17:34 -05:00
Michael Munday
625aad5da0 Make LuaJIT compile on s390x. 
I've disabled both the JIT and FFI for now. I've also stripped almost
all of the assembly out of vm_s390x.dasc, leaving only labels for the
most part. This is enough to get LuaJIT to compile but of course if
you try and run it it will explode.

The idea now is to re-add enough functionality to get a very basic
Lua program to run.
 2016-12-09 16:28:39 -05:00
Michael Munday
53b627b21c s/SP/sp/ in vm_s390x.dasc. 
We support the pseudo-register sp now.
 2016-12-06 12:47:23 -05:00
ketank-new
3288e547bf Update vm_s390x.dasc 
added definations to macros to test operand type refeered x86 definations
no JUMP instruction found for s390x used BRANCH RELATIVE on CONDITION instead (brc)
Not sure how the condition will be checked , need to discuss this
 2016-11-24 14:58:52 +05:30
ketank-new
4ea7607e02 Update vm_s390x.dasc 
added instructions to macros, referring macro defination of x86
for macro ins_ANDdid not find equivalent s390x replacement  instruction for 'Not' hence have currently marked the place as '????'

'????' has to be replaced with s390x complement instruction
 2016-11-24 14:02:50 +05:30
ketank-new
372f721e60 Update vm_s390x.dasc 
used MOVE LONG EXTENDED in place of mov and
MOVE LONG instead of movzx
 2016-11-24 11:25:07 +05:30
Michael Munday
5887962b0e Add assembly for decoding instructions. 
Still guessing at this point. This code will need to be changed.
 2016-11-23 18:02:00 -05:00
Michael Munday
dbf789536c Fix stack frame layout. 
f8-f15 are callee-saved (not f0,f2,f4 and f6). There isn't space
for them in the caller's stack frame so we need to increase the
size of the interpreter's stack frame.
 2016-11-23 17:30:10 -05:00
Michael Munday
5a69b4638a Fixup the save/restore register macros. 
I believe these macros obey the C calling convention, so we need to
allocate our stack frame and save all callee-save registers. We
can tune it later if it turns out we don't need all the registers.
 2016-11-22 13:58:10 -05:00
Michael Munday
d505a0e0ba Cleanup. 2016-11-22 13:47:35 -05:00
Michael Munday
d50f8aa92b Add preliminary frame offsets. 
These are educated guesses at this point. We might need more stack space because
we don't have many free registers available.
 2016-11-22 13:36:46 -05:00
ketank-new
31c0e6016a Update vm_s390x.dasc 
Added definitions to macros savereg and restreg
used Store and Load instructions 
to store and load register contents to n from memory
 2016-11-22 10:20:56 +05:30
Michael Munday
e90d985d08 Look for s390x file rather than S390x file. 2016-11-18 13:06:31 -05:00
ketank-new
3ac644ecee Update vm_s390x.dasc 
Assigned general purpose register to existing macros
 2016-11-18 17:09:20 +05:30
ketank-new
4aa1099d6a Update vm_s390x.dasc 
Referred arm dasc file have created slots wherein i have to replace them with s390x registers and instructions
 2016-11-17 14:58:17 +05:30
ketank-new
547b158ba4 Update vm_s390x.dasc 
made some changes like mentioning arch from x86 to S390x
removed some x86 specific code
 2016-11-16 15:34:32 +05:30
ketank-new
96afe3e331 Create vm_s390x.dasc 
created vm_s390x.dasc file
its a copy of vm_x86.dasc
working on to change this specific to s390x
 2016-11-15 10:42:11 +05:30