GTA V PS3 getEntityFromIndex reversed for use in scripts

#define subfc(a,b) (~b + a + 1)
int getAddressOfScriptIndexPoolItem(int pool, int entity) {
    unsigned int r3, r4, r5, r6, r7, r8, r9 = 0;
    r3 = pool;
    r4 = entity;

    r8 = r4 >> 8;
    r6 = *(int*)(r3 + 0x4);
    r5 = r4&0xFF;
    r7 = r8;
    r4 = *(int*)r3;
    r6 = *(char*)(r6 + r7);
    if (r6 != r5)
        return 0;
    r6 = *(int*)(r3 + 0x1C);
    if (r6 == 0)
        goto loc_A54DF4;
    r5 = *(int*)(r3 + 0x20);
    if (r7 < r5)//this check might be backwards
                //would be correct according to https://www.cs.uaf.edu/2011/fall/cs301/lecture/11_21_PowerPC.html
        goto loc_A54DF4;
    r9 = *(int*)(r3 + 0x8);
    if (r7 >= r9)//same as above one, might be backwards
        goto loc_A54DF4;
    r3 = subfc(r7, r5);//this also might be wrong lol
    r3 = r3 >> 2;
    r3 = *(int*)(r6 + r3);
    return r3;

loc_A54DF4:
    r3 = *(int*)(r3 + 0xC);
    r3 = r8 * r3;
    r3 = r4 + r3;
    return r3;
}
int getEntityFromIndex(int entityIndex) {
    if (entityIndex == -1)
        return 0;
#define ScriptEntityPool_fwScriptGuid 0x1CC5790
    int v = getAddressOfScriptIndexPoolItem(*(int*)ScriptEntityPool_fwScriptGuid, entityIndex);
    if (v == 0)
        return 0;
    return *(int*)(v + 0x4);
}