General Vritual Machine architecture - Revision history

Admin at 11:44, 7 June 2025

2025-06-07T11:44:33Z

Admin at 11:29, 23 July 2019

2019-07-23T11:29:42Z

Admin at 11:29, 23 July 2019

2019-07-23T11:29:13Z

Admin at 11:23, 23 July 2019

2019-07-23T11:23:27Z

Admin: /* Calls */

2019-07-23T09:32:17Z

Calls

Admin: /* Initialization and initializer list */

2019-07-16T13:41:50Z

Initialization and initializer list

Admin: /* Pointers and references */

2019-07-16T13:38:45Z

Pointers and references

Admin: /* Initialization and initializer list */

2019-07-16T13:27:32Z

Initialization and initializer list

Admin: /* Initialization and initializer list */

2019-07-16T13:25:06Z

Initialization and initializer list

Admin: /* Pointers and references */

2019-07-16T13:13:08Z

Pointers and references

@@ Line 128: / Line 128: @@
 </syntaxhighlight>You can push a pointer to an '''array element, but not to the array itself'''. Pushing pointer to array's first element works as expected.
-'''Note:'''pointers to local variables return addresses relative to script's frame start, which makes them useless in most cases, including passing as function arguments.
+<s>'''Note:'''pointers to local variables return addresses relative to script's frame start, which makes them useless in most cases, including passing as function arguments.</s> (no longer applies)
 ===Arrays===

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−	~~[[Category:VM]]~~

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@@ Line 145: / Line 145: @@
 ==Calls==
-TBC
+VM supports ~2000 of predefined call targets. Calls are performed by using <code>CALL</code>, <code>CALLACT</code>, <code>CALLPOPA</code>, <code>CALLACTPOPA</code> instructions.
 ==References==
 <references />

@@ Line 124: / Line 124: @@
 VM allows to push a pointer to a variable onto stack by use of <code>PUSHP</code> instruction. It isn't possible to use it as an array. It is considered to be just as any other value.
-This instruction is used exclusively to push references onto stack that will be arguments to external calls, that will store values in supplied variable references. Typical usage:
+This instruction is used exclusively to push references onto stack that will be arguments to external calls, that will store values in supplied variable references. Typical usage:<syntaxhighlight lang="c++">
- <source lang="cpp">getpos(&posx, &posy, &posz);</source>
+getpos(&posx, &posy, &posz);
-You can push a pointer to an '''array element, but not to the array itself'''. Pushing pointer to array's first element works as expected.
+</syntaxhighlight>You can push a pointer to an '''array element, but not to the array itself'''. Pushing pointer to array's first element works as expected.
 '''Note:'''pointers to local variables return addresses relative to script's frame start, which makes them useless in most cases, including passing as function arguments.
@@ Line 133: / Line 133: @@
 All variable types can be declared as either one or two dimensional arrays. For further information read [[Arrays|this article]].
 ===Initialization and initializer list===
-Variable tables can store initial values of file scope and script local scope variables and arrays. This feature is very scarcely used by original scripts, which choose to rather initialize them in script's <code>init</code> function by a typical assignment. Both assembler and compiler support typical c++ like initialization.
+Variable tables can store initial values of file scope and script local scope variables and arrays. This feature is very scarcely used by original scripts, which choose to rather initialize them in script's <code>init</code> function by a typical assignment. Both assembler and compiler support typical c++ like initialization.<syntaxhighlight lang="c++">
- <source lang="cpp">
+int variable = 3;
- int variable = 3;
+float array[3] = {
- float array[3] = {
+.3, 2.1,
-.3, 2.1,
+.14
-.14
+};
- };
+</syntaxhighlight>Initializers '''do not count''' towards integer/float values '''quota'''.
 ==REQ tables==