asm_x86.dasm

// DynASM directives.
|.arch x86
|.actionlist actions

// This define affects "|" DynASM lines.  "Dst" must
// resolve to a dasm_State** that points to a dasm_State*.
#define Dst &state
#include "jit_util.hpp"

void* translateFunc(asDWORD* byteCode, asDWORD* end)
{
    dasm_State *state;
    asjit::initjit(&state, actions);

    while (byteCode < end)
    {
        // Determine the instruction
        asEBCInstr op = asEBCInstr(*(asBYTE*)byteCode);
        switch (op)
        {
            // Translate each byte code instruction into native code.
            // The codes that cannot be translated should return the control
            // to the VM, so that it can continue the processing. When 
            // the VM encounters the next JitEntry instruction it will
            // transfer the control back to the JIT function.
		case asBC_SetV4:
			asBC_DWORD arg =  asBC_DWORDARG(op);
			| mov eax , arg
			break;
        case asBC_JitEntry:
            // Update the argument for the JitEntry instruction with  
            // the argument that should be sent to the jit function.
            // Remember that 0 means that the VM should not pass
            // control to the JIT function.
            asBC_PTRARG(byteCode) = 1;
            break;
        }

        // Move to next instruction
        byteCode += asBCTypeSize[asBCInfo[op].type];
    }

    // Link the code and write it to executable memory.
    void* fptr = asjit::jitcode(&state);

	return fptr;
}