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vararg back to '...' (but with another implementation)

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new implementation should have zero overhead for non-vararg functions
This commit is contained in:
Roberto Ierusalimschy
2018-02-09 13:16:06 -02:00
parent 4e0de3a43c
commit b1379936cf
11 changed files with 136 additions and 113 deletions
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10
lopcodes.h
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@@ -1,5 +1,5 @@
/*
** $Id: lopcodes.h,v 1.184 2018/01/28 15:13:26 roberto Exp roberto $
** $Id: lopcodes.h,v 1.186 2018/02/07 15:18:04 roberto Exp roberto $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -268,6 +268,7 @@ OP_CALL,/* A B C R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */
OP_TAILCALL,/* A B C return R(A)(R(A+1), ... ,R(A+B-1)) */
OP_RETURN,/* A B return R(A), ... ,R(A+B-2) (see note) */
OP_RETVARARG,/* A B return R(A), ... ,R(A+B-2) (see note) */
OP_RETURN0,/* return */
OP_RETURN1,/* A return R(A) */
@@ -286,7 +287,7 @@ OP_SETLIST,/* A B C R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B */
OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx]) */
OP_VARARG,/* A B C R(A), R(A+1), ..., R(A+C-2) = vararg(B) */
OP_VARARG,/* A B C R(A), R(A+1), ..., R(A+C-2) = vararg */
OP_PREPVARARG,/*A (adjust vararg parameters) */
@@ -305,9 +306,10 @@ OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */
OP_SETLIST) may use 'top'.
(*) In OP_VARARG, if (C == 0) then use actual number of varargs and
set top (like in OP_CALL with C == 0). B is the vararg parameter.
set top (like in OP_CALL with C == 0).
(*) In OP_RETURN, if (B == 0) then return up to 'top'.
(*) In OP_RETURN/OP_RETVARARG, if (B == 0) then return up to 'top'.
(OP_RETVARARG is the return instruction for vararg functions.)
(*) In OP_SETLIST, if (B == 0) then real B = 'top'; if (C == 0) then
next 'instruction' is EXTRAARG(real C).