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details about opcode parameters

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Roberto Ierusalimschy
2001-06-11 11:56:42 -03:00
parent 79acf5ea60
commit 0a1b1acdd3
6 changed files with 94 additions and 96 deletions
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24
lopcodes.h
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@@ -1,5 +1,5 @@
/*
** $Id: lopcodes.h,v 1.73 2001/06/05 18:17:01 roberto Exp roberto $
** $Id: lopcodes.h,v 1.74 2001/06/08 19:00:57 roberto Exp roberto $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
@@ -153,20 +153,20 @@ OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */
OP_JMP,/* sBc PC += sBc */
OP_CJMP,/* sBc if test then PC += sBc (see (1)) */
OP_TESTEQ,/* B C test := (R(B) == R/K(C)) */
OP_TESTNE,/* B C test := (R(B) ~= R/K(C)) */
OP_TESTLT,/* B C test := (R(B) < R/K(C)) */
OP_TESTLE,/* B C test := (R(B) <= R/K(C)) */
OP_TESTGT,/* B C test := (R(B) > R/K(C)) */
OP_TESTGE,/* B C test := (R(B) >= R/K(C)) */
OP_TESTEQ,/* A C test := (R(A) == R/K(C)) */
OP_TESTNE,/* A C test := (R(A) ~= R/K(C)) */
OP_TESTLT,/* A C test := (R(A) < R/K(C)) */
OP_TESTLE,/* A C test := (R(A) <= R/K(C)) */
OP_TESTGT,/* A C test := (R(A) > R/K(C)) */
OP_TESTGE,/* A C test := (R(A) >= R/K(C)) */
OP_TESTT,/* A B test := R(B); if (test) R(A) := R(B) */
OP_TESTF,/* A B test := not R(B); if (test) R(A) := nil */
OP_NILJMP,/* A R(A) := nil; PC++; */
OP_CALL,/* A B C R(A), ... ,R(C-1) := R(A)(R(A+1), ... ,R(B-1)) */
OP_RETURN,/* A B return R(A), ... ,R(B-1) (see (3)) */
OP_CALL,/* A B C R(A), ... ,R(A+C-1) := R(A)(R(A+1), ... ,R(A+B))*/
OP_RETURN,/* A B return R(A), ... ,R(A+B-1) (see (3)) */
OP_FORPREP,/* A sBc */
OP_FORLOOP,/* A sBc */
@@ -191,10 +191,10 @@ OP_CLOSURE /* A Bc R(A) := closure(KPROTO[Bc], R(A), ... ,R(A+n)) */
instructions OP_TEST* and OP_CJMP must always occur together.
(2) In OP_CALL, if (B == NO_REG) then B = top. C is the number of returns,
and can be NO_REG. OP_CALL always set "top" to last_result+1, so
next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use "top".
and can be NO_REG. OP_CALL can set `top' to last_result+1, so
next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'.
(3) In OP_RETURN, if (B == NO_REG) then B = top.
(3) In OP_RETURN, if (B == NO_REG) then return up to `top'
===========================================================================*/