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188 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
46c3587a6f Clearer distinction between types and tags 
LUA_T* represents only types; tags (types + Variants) are represented
by LUA_V* constants.
 2020-01-31 11:09:53 -03:00
Roberto Ierusalimschy
1e0ad018ce Comment about LUA_COMPAT_LT_LE moved to proper place 2019-12-10 13:50:20 -03:00
Roberto Ierusalimschy
72a094bda7 Undo change in the handling of 'L->top' (commit b80077b8f3) 
With MMBIN instructions, there are fewer opcodes that need to update
'L->top', so that change does not seem to pay for the increased
complexity.
 2019-08-29 12:52:37 -03:00
Roberto Ierusalimschy
df13f25948 First version of OP_MMBIN opcodes 
In arithmetic/bitwise operators, the call to metamethods is made
in a separate opcode following the main one. (The main
opcode skips this next one when the operation succeeds.) This
change reduces slightly the size of the binary and the complexity
of the arithmetic/bitwise opcodes. It also simplfies the treatment
of errors and yeld/resume in these operations, as there are much
fewer cases to consider. (Only OP_MMBIN/OP_MMBINI/OP_MMBINK,
instead of all variants of all arithmetic/bitwise operators.)
 2019-08-27 13:59:39 -03:00
Roberto Ierusalimschy
b80077b8f3 Change in the handling of 'L->top' when calling metamethods 
Instead of updating 'L->top' in every place that may call a
metamethod, the metamethod functions themselves (luaT_trybinTM and
luaT_callorderTM) correct the top. (When calling metamethods from
the C API, however, the callers must preserve 'L->top'.)
 2019-07-26 14:59:39 -03:00
Roberto Ierusalimschy
e888976bc6 Details (typos in comments) 2019-07-05 15:03:15 -03:00
Roberto Ierusalimschy
23e6bac8a0 Keep correct type for immediate operands in comparisons 
When calling metamethods for things like 'a < 3.0', which generates
the opcode OP_LTI, the C register tells that the operand was
converted to an integer, so that it can be corrected to float when
calling a metamethod.

This commit also includes some other stuff:
- file 'onelua.c' added to the project
- opcode OP_PREPVARARG renamed to OP_VARARGPREP
- comparison opcodes rewritten through macros
 2019-03-22 13:37:17 -03:00
Roberto Ierusalimschy
5e76a4fd31 New macros for arithmetic/bitwise operations in 'luaV_execute' 
The repetitive code of the arithmetic and bitwise operators in
the main iterpreter loop was moved to appropriate macros.
(As a detail, the function 'luaV_div' was renamed 'luaV_idiv',
as it does an "integer division" (floor division).
 2018-11-05 16:10:42 -02:00
Roberto Ierusalimschy
bd96330d03 First "complete" implementation of to-be-closed variables 
Still missing:
- handling of memory errors when creating upvalue (must run closing
method all the same)
- interaction with coroutines
 2018-10-17 10:44:42 -03:00
Roberto Ierusalimschy
8c8a91f2ef Deprecated the emulation of '__le' using '__lt' 
As hinted in the manual for Lua 5.3, the emulation of the metamethod
for '__le' using '__le' has been deprecated. It is slow, complicates
the logic, and it is easy to avoid this emulation by defining a proper
'__le' function.

Moreover, often this emulation was used wrongly, with a programmer
assuming that an order is total when it is not (e.g., NaN in
floating-point numbers).
 2018-08-24 10:17:54 -03:00
Roberto Ierusalimschy
f99509581e Removed extra information from RCS keyword strings 
Version numbers and dates (mostly wrong) from RCS keyword strings
removed from all source files; only the file name are kept.
 2018-08-23 14:26:12 -03:00
Roberto Ierusalimschy
b95e466218 new field 'nilvalue' in struct 'global_State' to avoid the use of 
addresses of static variables
 2018-06-15 16:31:22 -03:00
Roberto Ierusalimschy
6f2b8e21c4 added 'const' to 'Proto*' when possible 2018-06-08 16:06:59 -03:00
Roberto Ierusalimschy
505fc91222 no more 'luaO_nilobject' to avoid comparison of global variable addresses 
(now uses static variables)
 2018-06-01 14:40:38 -03:00
Roberto Ierusalimschy
03c6a05ec8 no more nil-in-table 2018-04-04 11:23:41 -03:00
Roberto Ierusalimschy
b7edf5d2d8 metamethods for 'removekey'/'keyin' 2018-02-27 14:48:28 -03:00
Roberto Ierusalimschy
ef8263f81f better names for macros for tags and types. 
rttype -> rawtt; ttyperaw -> withvariant; ttype -> ttypetag;
tnov -> ttype
 2018-02-26 11:16:05 -03:00
Roberto Ierusalimschy
9243c414d9 first version of empty entries in tables 
(so that, in the future, tables can contain regular nil entries)
 2018-02-23 10:16:18 -03:00
Roberto Ierusalimschy
212095a601 new opcodes OP_GTI/OP_GEI 2018-02-21 12:49:32 -03:00
Roberto Ierusalimschy
49dae52d08 correct way to check stack space for vararg functions 2018-02-17 17:20:00 -02:00
Roberto Ierusalimschy
0682fe8169 some simplifications/optimizations in returns from Lua functions 2018-02-15 13:34:29 -02:00
Roberto Ierusalimschy
b1379936cf vararg back to '...' (but with another implementation) 
new implementation should have zero overhead for non-vararg functions
 2018-02-09 13:16:06 -02:00
Roberto Ierusalimschy
318a9a5859 new opcode 'PREPVARARG' 
(avoids test for vararg function in all function calls)
 2018-02-07 13:18:04 -02:00
Roberto Ierusalimschy
89110986d7 bug in tailcall of vararg functions 
(when adjusting missing parameters)
 2018-01-28 11:39:52 -02:00
Roberto Ierusalimschy
53979dfe0d calling a vararg function needs to check GC 
(because it creates a new table)
 2018-01-28 10:08:04 -02:00
Roberto Ierusalimschy
cf7eff45f3 keep control of stack top in Lua functions concentrated in 'luaV_execute' 2017-12-28 13:42:57 -02:00
Roberto Ierusalimschy
1d5b885437 when running Lua code, there is no need to keep 'L->top' "correct"; 
set it only when needed.
 2017-12-20 12:58:05 -02:00
Roberto Ierusalimschy
4dc0be950a new macro 'isLuacode' (to distinguish regular Lua code from 
hooks, where C code can run inside a Lua function).
 2017-12-19 14:40:17 -02:00
Roberto Ierusalimschy
b3f924bc69 'Proto->numparams' does not include vararg parameter 
(one less subtraction when calling functions...)
 2017-12-15 11:07:10 -02:00
Roberto Ierusalimschy
86431a2f1c new opcodes BANDK/BORK/BXORK. (They do not use immediate operands 
because, too often, masks in bitwise operations are integers larger
than one byte.)
 2017-12-13 16:32:09 -02:00
Roberto Ierusalimschy
ac78b914b6 warnings from Visual Studio /W3 2017-11-30 13:37:16 -02:00
Roberto Ierusalimschy
093c16b67b new opcodes 'OP_LTI' and 'OP_LEI' 2017-11-27 15:44:31 -02:00
Roberto Ierusalimschy
73abfde2ef small simplifications around 'luaT_callorderTM' 2017-11-23 17:18:10 -02:00
Roberto Ierusalimschy
26679ea35b new function 'luaV_flttointeger' to convert floats to integers (without 
string coercions) + string operands to bitwise operations handled
by string metamethods
 2017-11-08 12:50:23 -02:00
Roberto Ierusalimschy
ad0704e40c back to 'CallInfo' (no gains with its removal) 2017-11-07 11:25:26 -02:00
Roberto Ierusalimschy
54eb35a8aa more fields moved out of 'CallInfo' 2017-11-03 10:12:30 -02:00
Roberto Ierusalimschy
9ed9f40f1e avoid warning about 'const' 2017-10-04 12:49:05 -03:00
Roberto Ierusalimschy
1b10033583 new function 'luaT_trybiniTM' 
to handle tag methods for instructions with immediate integer arguments
 2017-09-27 15:59:08 -03:00
Roberto Ierusalimschy
6d998055c8 no more reference 'memerrmsg' + new reference to "n" 
(both can be retrieved by 'luaS_newliteral' without creating anything,
because they are fixed, but "n" deserves fast access while 'memerrmsg'
does not)
 2017-07-27 10:50:16 -03:00
Roberto Ierusalimschy
f96497397a new type 'StackValue' for stack elements 
(we may want to put extra info there in the future)
 2017-06-29 12:06:44 -03:00
Roberto Ierusalimschy
5c8770f896 back to old-style vararg system (with vararg table collecting extra 
arguments)
 2017-05-13 10:04:33 -03:00
Roberto Ierusalimschy
fb9de1b4d7 detail ('luaT_callbinTM' does not need to be extern) 2017-05-08 12:57:23 -03:00
Roberto Ierusalimschy
a3d36fe283 Upvalues collected like everything else (with mark-sweep) instead 
of reference count (simpler and better for generational mode)
 2017-04-11 15:41:09 -03:00
Roberto Ierusalimschy
2a235312f0 detail (removing spaces at end of lines) 2016-12-22 11:08:50 -02:00
Roberto Ierusalimschy
7777b412de When available, use metafield '__name' in error messages 2016-02-26 16:20:15 -03:00
Roberto Ierusalimschy
46de77b219 bug: despite its name, 'luaH_getstr' did not work for strings in 
general, but only for short strings
 2015-11-03 13:47:30 -02:00
Roberto Ierusalimschy
ff1289a361 in 'luaD_call', use two functions instead of one with fixed boolean 
argument
 2015-11-02 16:48:07 -02:00
Roberto Ierusalimschy
3a91274547 details (avoid 'lint' warnings) 2015-03-30 12:42:59 -03:00
Roberto Ierusalimschy
5fbd40dbe5 'x//y' extended to floats 2014-11-21 10:15:57 -02:00
Roberto Ierusalimschy
779381fe9e detail (comment) 2014-11-10 15:24:43 -02:00