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Optimizations for GDScript VM

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* Removed instruction argument count and instruction prefetching. This is now done on the fly. Reduces jumps.
* OPCODE_DISPATCH now goes directly to the next instruction, like in Godot 3.x.

I have nothing I can use to test performance, so if anyone wants to lend a hand and compare with master (both on debug and release), it would be very welcome.
This commit is contained in:
Juan Linietsky
2023-01-02 15:29:44 +01:00
parent 57267709e6
commit 7211e041df
5 changed files with 405 additions and 360 deletions
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9
modules/gdscript/gdscript_byte_codegen.h
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@@ -331,8 +331,13 @@ class GDScriptByteCodeGenerator : public GDScriptCodeGenerator {
return -1; // Unreachable.
}
void append(GDScriptFunction::Opcode p_code, int p_argument_count) {
opcodes.push_back((p_code & GDScriptFunction::INSTR_MASK) | (p_argument_count << GDScriptFunction::INSTR_BITS));
void append_opcode(GDScriptFunction::Opcode p_code) {
opcodes.push_back(p_code);
}
void append_opcode_and_argcount(GDScriptFunction::Opcode p_code, int p_argument_count) {
opcodes.push_back(p_code);
opcodes.push_back(p_argument_count);
instr_args_max = MAX(instr_args_max, p_argument_count);
}