generic_hal.c

cg编译器

 * GetConnectorID_generic()
 */

static int GetConnectorID_generic(int name)
{
    int i;

    for (i = 0; i < NUMELS(connectors_generic); i++)
        if (name == connectors_generic[i].name)
            return connectors_generic[i].cid;

    return 0;
}


/*
 * GetConnectorAtom_generic()
 */

static int GetConnectorAtom_generic(int name)
{
    const ConnectorDescriptor *conn
        = LookupConnectorHAL(connectors_generic, name, NUMELS(connectors_generic));
    return conn ? conn->name : 0;
} // GetConnectorAtom_generic

/*
 * GetConnectorUses_generic()
 */

static int GetConnectorUses_generic(int cid, int pid)
{
    const ConnectorDescriptor *conn
        = LookupConnectorHAL(connectors_generic, cid, NUMELS(connectors_generic));
    return conn ? conn->properties : 0;
} //GetConnectorUses_generic

/*
 * GetConnectorRegister_generic()
 */

static int GetConnectorRegister_generic(int cid, int ByIndex, int ratom, Binding *fBind)
{
    int i;
    ConnectorDescriptor *conn;
    ConnectorRegisters *regs;

    conn = LookupConnectorHAL(connectors_generic, cid, NUMELS(connectors_generic));
    if (! conn)
        return 0;

    regs = conn->registers;

    if (! regs)
        return 0;
    
    for (i = 0; i < conn->numregs; i++) {
        if (ratom == regs[i].name) {
            SetSymbolConnectorBindingHAL(fBind, &regs[i]);
            return 1;
        }
    }

    return 0;
} // GetConnectorRegister_generic

/*
 * GetCapsBit_generic() - Return an integer value representing the
 * capabilities of this profile.
 */

static int GetCapsBit_generic(int bitNumber)
{
    switch (bitNumber) {
    case CAPS_INDEXED_ARRAYS:
    case CAPS_DONT_FLATTEN_IF_STATEMENTS:
        return 1;
    default:
        return 0;
    }
} // GetCapsBit_generic


/*
 * CheckInternalFunction_generic() - Check for internally implemented
 * function.
 */

static int CheckInternalFunction_generic(Symbol *fSymb, int *group)
{
    return 1;
} // CheckInternalFunction_generic

/*
 * BindUniformUnbound_generic() - Bind an unbound variable to a free
 * uniform resource.
 *
 */

static int BindUniformUnbound_generic(SourceLoc *loc, Symbol *fSymb,
                                      Binding *fBind)
{
    fBind->none.properties |= BIND_IS_BOUND;
    return 1;
} // BindUniformUnbound_generic

/*
 * BindVaryingSemantic_generic()
 */

static int BindVaryingSemantic_generic(SourceLoc *loc, Symbol *fSymb,
                                       int semantic, Binding *fBind,
                                       int IsOutVal)
{
    int ii, index, len, HasSuffix, base, IsFloating;
    SemanticsDescriptor *semantics;
    char root[128];
    const char *pname, *match;
    Type *lType;

    pname = GetAtomString(atable, semantic);
    HasSuffix = HasNumericSuffix(pname, root, 128, &index);
    semantics = Cg->theHAL->semantics;
    for (ii = 0; ii < Cg->theHAL->numSemantics; ii++, semantics++) {
        match = semantics->numregs > 0 ? root : pname;
        if (!strcmp(match, semantics->sname)) {
            if (semantics->numregs > 0) {
                if (index >= semantics->numregs) {
                    SemanticError(loc, ERROR_S_SEMANTICS_INDEX_TOO_BIG, pname);
                    return 0;
                }
            } else {
                index = 0;
            }

            // Found a match.  See if the type is compatible:

            lType = fSymb->type;
            if (IsScalar(lType)) {
                len = 1;
            } else if (IsVector(lType, &len)) {
            } else {
                SemanticError(loc, ERROR_S_SEM_VAR_NOT_SCALAR_VECTOR,
                              GetAtomString(atable, fSymb->name));
                return 0;
            }
            base = GetBase(lType);
            IsFloating = (base == TYPE_BASE_FLOAT);
            if (!IsFloating)
                return 0;

            if (semantics->properties & SEM_VARYING) {
                fBind->none.kind = BK_CONNECTOR;
                fBind->conn.rname = semantic;
                fBind->conn.regno = semantics->regno + index;
                fSymb->properties |= SYMB_IS_CONNECTOR_REGISTER;
            } else {
                fBind->none.kind = BK_SEMANTIC;
                fBind->sem.sname = semantic;
                fBind->sem.sregno = 0;
            }
            fBind->none.properties |= BIND_IS_BOUND | BIND_VARYING;
            if (semantics->properties & SEM_HIDDEN)
                fBind->conn.properties |= BIND_HIDDEN;
            fSymb->properties |= SYMB_CONNECTOR_CAN_READ; // Obsolete
            fSymb->properties |= SYMB_CONNECTOR_CAN_WRITE; // Obsolete
            if (semantics->properties & SEM_IN)
                fBind->none.properties |= BIND_INPUT;
            if (semantics->properties & SEM_OUT)
                fBind->none.properties |= BIND_OUTPUT;
            if (semantics->properties & SEM_REQUIRED)
                fBind->none.properties |= BIND_WRITE_REQUIRED;
            // fBind->none,gname set elsewhere
            // fBind->none.lname set elsewhere
            fBind->none.base = semantics->base;
            fBind->none.size = semantics->size;
            return 1;
        }
    }
    return 0;
} // BindVaryingSemantic_generic

/*
 * PrintCodeHeader_generic()
 */

static int PrintCodeHeader_generic(FILE *out)
{
    fprintf(out, "# Generic output by Cg compiler\n");
    return 1;
} // PrintCodeHeader_generic


static void PrintFunctions(Symbol *symb)
{
    Symbol *fSymb;
    if (symb) {
        PrintFunctions(symb->left);
        if (IsFunction(symb)) {
            fSymb = symb;
            while (fSymb) {
                PrintFunction(fSymb);
                BPrintFunction(fSymb);
                fSymb = fSymb->details.fun.overload;
            }
        }
        PrintFunctions(symb->right);
    }
}

/*
 * GenerateCode_generic() - Generates human-readable generic output form of
 * source code.
 */

static int GenerateCode_generic(SourceLoc *loc, Scope *fScope, Symbol *program)
{
    PrintFunctions(fScope->symbols);
    return 1;
} // GenerateCode_generic

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//////////////////////// End of generic_hal.c /////////////////////////////////
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