root/trunk/rebuild/arrayop.c

// Copyright (c) 1999-2008 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// License for redistribution is by either the Artistic License
// in artistic.txt, or the GNU General Public License in gnu.txt.
// See the included readme.txt for details.

#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "mem.h"

#include "stringtable.h"

#include "expression.h"
#include "statement.h"
#include "mtype.h"
#include "declaration.h"
#include "scope.h"
#include "id.h"
#include "module.h"
#include "init.h"

extern int binary(const char *p , const char **tab, int high);

/**************************************
 * Hash table of array op functions already generated or known about.
 */

StringTable arrayfuncs;

/***********************************
 * Construct the array operation expression.
 */

Expression *BinExp::arrayOp(Scope *sc)
{
    Expressions *arguments = new Expressions();

    /* The expression to generate an array operation for is mangled
     * into a name to use as the array operation function name.
     * Mangle in the operands and operators in RPN order, and type.
     */
    OutBuffer buf;
    buf.writestring("_array");
    buildArrayIdent(&buf, arguments);
    buf.writeByte('_');

    /* Append deco of array element type
     */
#if V2
    buf.writestring(type->toBasetype()->nextOf()->toBasetype()->mutableOf()->deco);
#else
    buf.writestring(type->toBasetype()->nextOf()->toBasetype()->deco);
#endif

    size_t namelen = buf.offset;
    buf.writeByte(0);
    char *name = (char *)buf.extractData();

    /* Look up name in hash table
     */
    StringValue *sv = arrayfuncs.update(name, namelen);
    FuncDeclaration *fd = (FuncDeclaration *)sv->ptrvalue;
    if (!fd)
    {
    /* Some of the array op functions are written as library functions,
     * presumably to optimize them with special CPU vector instructions.
     * List those library functions here, in alpha order.
     */
    static const char *libArrayopFuncs[] =
    {
        "_arrayExpSliceAddass_a",
        "_arrayExpSliceAddass_d",       // T[]+=T
        "_arrayExpSliceAddass_f",       // T[]+=T
        "_arrayExpSliceAddass_g",
        "_arrayExpSliceAddass_h",
        "_arrayExpSliceAddass_i",
        "_arrayExpSliceAddass_k",
        "_arrayExpSliceAddass_s",
        "_arrayExpSliceAddass_t",
        "_arrayExpSliceAddass_u",
        "_arrayExpSliceAddass_w",

        "_arrayExpSliceDivass_d",       // T[]/=T
        "_arrayExpSliceDivass_f",       // T[]/=T

        "_arrayExpSliceMinSliceAssign_a",
        "_arrayExpSliceMinSliceAssign_d",   // T[]=T-T[]
        "_arrayExpSliceMinSliceAssign_f",   // T[]=T-T[]
        "_arrayExpSliceMinSliceAssign_g",
        "_arrayExpSliceMinSliceAssign_h",
        "_arrayExpSliceMinSliceAssign_i",
        "_arrayExpSliceMinSliceAssign_k",
        "_arrayExpSliceMinSliceAssign_s",
        "_arrayExpSliceMinSliceAssign_t",
        "_arrayExpSliceMinSliceAssign_u",
        "_arrayExpSliceMinSliceAssign_w",

        "_arrayExpSliceMinass_a",
        "_arrayExpSliceMinass_d",       // T[]-=T
        "_arrayExpSliceMinass_f",       // T[]-=T
        "_arrayExpSliceMinass_g",
        "_arrayExpSliceMinass_h",
        "_arrayExpSliceMinass_i",
        "_arrayExpSliceMinass_k",
        "_arrayExpSliceMinass_s",
        "_arrayExpSliceMinass_t",
        "_arrayExpSliceMinass_u",
        "_arrayExpSliceMinass_w",

        "_arrayExpSliceMulass_d",       // T[]*=T
        "_arrayExpSliceMulass_f",       // T[]*=T
        "_arrayExpSliceMulass_i",
        "_arrayExpSliceMulass_k",
        "_arrayExpSliceMulass_s",
        "_arrayExpSliceMulass_t",
        "_arrayExpSliceMulass_u",
        "_arrayExpSliceMulass_w",

        "_arraySliceExpAddSliceAssign_a",
        "_arraySliceExpAddSliceAssign_d",   // T[]=T[]+T
        "_arraySliceExpAddSliceAssign_f",   // T[]=T[]+T
        "_arraySliceExpAddSliceAssign_g",
        "_arraySliceExpAddSliceAssign_h",
        "_arraySliceExpAddSliceAssign_i",
        "_arraySliceExpAddSliceAssign_k",
        "_arraySliceExpAddSliceAssign_s",
        "_arraySliceExpAddSliceAssign_t",
        "_arraySliceExpAddSliceAssign_u",
        "_arraySliceExpAddSliceAssign_w",

        "_arraySliceExpDivSliceAssign_d",   // T[]=T[]/T
        "_arraySliceExpDivSliceAssign_f",   // T[]=T[]/T

        "_arraySliceExpMinSliceAssign_a",
        "_arraySliceExpMinSliceAssign_d",   // T[]=T[]-T
        "_arraySliceExpMinSliceAssign_f",   // T[]=T[]-T
        "_arraySliceExpMinSliceAssign_g",
        "_arraySliceExpMinSliceAssign_h",
        "_arraySliceExpMinSliceAssign_i",
        "_arraySliceExpMinSliceAssign_k",
        "_arraySliceExpMinSliceAssign_s",
        "_arraySliceExpMinSliceAssign_t",
        "_arraySliceExpMinSliceAssign_u",
        "_arraySliceExpMinSliceAssign_w",

        "_arraySliceExpMulSliceAddass_d",   // T[] += T[]*T
        "_arraySliceExpMulSliceAddass_f",
        "_arraySliceExpMulSliceAddass_r",

        "_arraySliceExpMulSliceAssign_d",   // T[]=T[]*T
        "_arraySliceExpMulSliceAssign_f",   // T[]=T[]*T
        "_arraySliceExpMulSliceAssign_i",
        "_arraySliceExpMulSliceAssign_k",
        "_arraySliceExpMulSliceAssign_s",
        "_arraySliceExpMulSliceAssign_t",
        "_arraySliceExpMulSliceAssign_u",
        "_arraySliceExpMulSliceAssign_w",

        "_arraySliceExpMulSliceMinass_d",   // T[] -= T[]*T
        "_arraySliceExpMulSliceMinass_f",
        "_arraySliceExpMulSliceMinass_r",

        "_arraySliceSliceAddSliceAssign_a",
        "_arraySliceSliceAddSliceAssign_d", // T[]=T[]+T[]
        "_arraySliceSliceAddSliceAssign_f", // T[]=T[]+T[]
        "_arraySliceSliceAddSliceAssign_g",
        "_arraySliceSliceAddSliceAssign_h",
        "_arraySliceSliceAddSliceAssign_i",
        "_arraySliceSliceAddSliceAssign_k",
        "_arraySliceSliceAddSliceAssign_r", // T[]=T[]+T[]
        "_arraySliceSliceAddSliceAssign_s",
        "_arraySliceSliceAddSliceAssign_t",
        "_arraySliceSliceAddSliceAssign_u",
        "_arraySliceSliceAddSliceAssign_w",

        "_arraySliceSliceAddass_a",
        "_arraySliceSliceAddass_d",     // T[]+=T[]
        "_arraySliceSliceAddass_f",     // T[]+=T[]
        "_arraySliceSliceAddass_g",
        "_arraySliceSliceAddass_h",
        "_arraySliceSliceAddass_i",
        "_arraySliceSliceAddass_k",
        "_arraySliceSliceAddass_s",
        "_arraySliceSliceAddass_t",
        "_arraySliceSliceAddass_u",
        "_arraySliceSliceAddass_w",

        "_arraySliceSliceMinSliceAssign_a",
        "_arraySliceSliceMinSliceAssign_d", // T[]=T[]-T[]
        "_arraySliceSliceMinSliceAssign_f", // T[]=T[]-T[]
        "_arraySliceSliceMinSliceAssign_g",
        "_arraySliceSliceMinSliceAssign_h",
        "_arraySliceSliceMinSliceAssign_i",
        "_arraySliceSliceMinSliceAssign_k",
        "_arraySliceSliceMinSliceAssign_r", // T[]=T[]-T[]
        "_arraySliceSliceMinSliceAssign_s",
        "_arraySliceSliceMinSliceAssign_t",
        "_arraySliceSliceMinSliceAssign_u",
        "_arraySliceSliceMinSliceAssign_w",

        "_arraySliceSliceMinass_a",
        "_arraySliceSliceMinass_d",     // T[]-=T[]
        "_arraySliceSliceMinass_f",     // T[]-=T[]
        "_arraySliceSliceMinass_g",
        "_arraySliceSliceMinass_h",
        "_arraySliceSliceMinass_i",
        "_arraySliceSliceMinass_k",
        "_arraySliceSliceMinass_s",
        "_arraySliceSliceMinass_t",
        "_arraySliceSliceMinass_u",
        "_arraySliceSliceMinass_w",

        "_arraySliceSliceMulSliceAssign_d", // T[]=T[]*T[]
        "_arraySliceSliceMulSliceAssign_f", // T[]=T[]*T[]
        "_arraySliceSliceMulSliceAssign_i",
        "_arraySliceSliceMulSliceAssign_k",
        "_arraySliceSliceMulSliceAssign_s",
        "_arraySliceSliceMulSliceAssign_t",
        "_arraySliceSliceMulSliceAssign_u",
        "_arraySliceSliceMulSliceAssign_w",

        "_arraySliceSliceMulass_d",     // T[]*=T[]
        "_arraySliceSliceMulass_f",     // T[]*=T[]
        "_arraySliceSliceMulass_i",
        "_arraySliceSliceMulass_k",
        "_arraySliceSliceMulass_s",
        "_arraySliceSliceMulass_t",
        "_arraySliceSliceMulass_u",
        "_arraySliceSliceMulass_w",
    };

    //int i = binary(name, libArrayopFuncs, sizeof(libArrayopFuncs) / sizeof(char *));
        int i = -1;
    if (i == -1)
    {
#ifdef DEBUG    // Make sure our array is alphabetized
        for (i = 0; i < sizeof(libArrayopFuncs) / sizeof(char *); i++)
        {
        if (strcmp(name, libArrayopFuncs[i]) == 0)
            assert(0);
        }
#endif
        /* Not in library, so generate it.
         * Construct the function body:
         *  foreach (i; 0 .. p.length)    for (size_t i = 0; i < p.length; i++)
         *      loopbody;
         *  return p;
         */

        Arguments *fparams = new Arguments();
        Expression *loopbody = buildArrayLoop(fparams);
        Argument *p = (Argument *)fparams->data[0 /*fparams->dim - 1*/];
#if V1
        // for (size_t i = 0; i < p.length; i++)
        Initializer *init = new ExpInitializer(0, new IntegerExp(0, 0, Type::tsize_t));
        Dsymbol *d = new VarDeclaration(0, Type::tsize_t, Id::p, init);
        Statement *s1 = new ForStatement(0,
        new DeclarationStatement(0, d),
        new CmpExp(TOKlt, 0, new IdentifierExp(0, Id::p), new ArrayLengthExp(0, new IdentifierExp(0, p->ident))),
        new PostExp(TOKplusplus, 0, new IdentifierExp(0, Id::p)),
        new ExpStatement(0, loopbody));
#else
        // foreach (i; 0 .. p.length)
        Statement *s1 = new ForeachRangeStatement(0, TOKforeach,
        new Argument(0, NULL, Id::p, NULL),
        new IntegerExp(0, 0, Type::tint32),
        new ArrayLengthExp(0, new IdentifierExp(0, p->ident)),
        new ExpStatement(0, loopbody));
#endif
        Statement *s2 = new ReturnStatement(0, new IdentifierExp(0, p->ident));
        //printf("s2: %s\n", s2->toChars());
        Statement *fbody = new CompoundStatement(0, s1, s2);

        /* Construct the function
         */
        TypeFunction *ftype = new TypeFunction(fparams, type, 0, LINKc);
        //printf("ftype: %s\n", ftype->toChars());
        fd = new FuncDeclaration(0, 0, Lexer::idPool(name), STCundefined, ftype);
        fd->fbody = fbody;
        fd->protection = PROTpublic;
        fd->linkage = LINKc;

        sc->module->importedFrom->members->push(fd);

        sc = sc->push();
        sc->parent = sc->module->importedFrom;
        sc->stc = 0;
        sc->linkage = LINKc;
        fd->semantic(sc);
        sc->pop();
    }
    else
    {   /* In library, refer to it.
         */
        fd = FuncDeclaration::genCfunc(type, name);
    }
    sv->ptrvalue = fd;  // cache symbol in hash table
    }

    /* Call the function fd(arguments)
     */
    Expression *ec = new VarExp(0, fd);
    Expression *e = new CallExp(loc, ec, arguments);
    e->type = type;
    return e;
}

/******************************************
 * Construct the identifier for the array operation function,
 * and build the argument list to pass to it.
 */

void Expression::buildArrayIdent(OutBuffer *buf, Expressions *arguments)
{
    buf->writestring("Exp");
    arguments->shift(this);
}

void SliceExp::buildArrayIdent(OutBuffer *buf, Expressions *arguments)
{
    buf->writestring("Slice");
    arguments->shift(this);
}

void AssignExp::buildArrayIdent(OutBuffer *buf, Expressions *arguments)
{
    /* Evaluate assign expressions right to left
     */
    e2->buildArrayIdent(buf, arguments);
    e1->buildArrayIdent(buf, arguments);
    buf->writestring("Assign");
}

#define X(Str) \
void Str##AssignExp::buildArrayIdent(OutBuffer *buf, Expressions *arguments) \
{                           \
    /* Evaluate assign expressions right to left    \
     */                         \
    e2->buildArrayIdent(buf, arguments);        \
    e1->buildArrayIdent(buf, arguments);        \
    buf->writestring(#Str);             \
    buf->writestring("ass");                \
}

X(Add)
X(Min)
X(Mul)
X(Div)
X(Mod)
X(Xor)
X(And)
X(Or)

#undef X

void NegExp::buildArrayIdent(OutBuffer *buf, Expressions *arguments)
{
    e1->buildArrayIdent(buf, arguments);
    buf->writestring("Neg");
}

void ComExp::buildArrayIdent(OutBuffer *buf, Expressions *arguments)
{
    e1->buildArrayIdent(buf, arguments);
    buf->writestring("Com");
}

#define X(Str) \
void Str##Exp::buildArrayIdent(OutBuffer *buf, Expressions *arguments)  \
{                                   \
    /* Evaluate assign expressions left to right            \
     */                                 \
    e1->buildArrayIdent(buf, arguments);                \
    e2->buildArrayIdent(buf, arguments);                \
    buf->writestring(#Str);                     \
}

X(Add)
X(Min)
X(Mul)
X(Div)
X(Mod)
X(Xor)
X(And)
X(Or)

#undef X

/******************************************
 * Construct the inner loop for the array operation function,
 * and build the parameter list.
 */

Expression *Expression::buildArrayLoop(Arguments *fparams)
{
    Identifier *id = Identifier::generateId("c", fparams->dim);
    Argument *param = new Argument(0, type, id, NULL);
    fparams->shift(param);
    Expression *e = new IdentifierExp(0, id);
    return e;
}

Expression *SliceExp::buildArrayLoop(Arguments *fparams)
{
    Identifier *id = Identifier::generateId("p", fparams->dim);
    Argument *param = new Argument(STCconst, type, id, NULL);
    fparams->shift(param);
    Expression *e = new IdentifierExp(0, id);
    Expressions *arguments = new Expressions();
    Expression *index = new IdentifierExp(0, Id::p);
    arguments->push(index);
    e = new ArrayExp(0, e, arguments);
    return e;
}

Expression *AssignExp::buildArrayLoop(Arguments *fparams)
{
    /* Evaluate assign expressions right to left
     */
    Expression *ex2 = e2->buildArrayLoop(fparams);
    Expression *ex1 = e1->buildArrayLoop(fparams);
    Argument *param = (Argument *)fparams->data[0];
    param->storageClass = 0;
    Expression *e = new AssignExp(0, ex1, ex2);
    return e;
}

#define X(Str) \
Expression *Str##AssignExp::buildArrayLoop(Arguments *fparams)  \
{                               \
    /* Evaluate assign expressions right to left        \
     */                             \
    Expression *ex2 = e2->buildArrayLoop(fparams);      \
    Expression *ex1 = e1->buildArrayLoop(fparams);      \
    Argument *param = (Argument *)fparams->data[0];     \
    param->storageClass = 0;                    \
    Expression *e = new Str##AssignExp(0, ex1, ex2);        \
    return e;                           \
}

X(Add)
X(Min)
X(Mul)
X(Div)
X(Mod)
X(Xor)
X(And)
X(Or)

#undef X

Expression *NegExp::buildArrayLoop(Arguments *fparams)
{
    Expression *ex1 = e1->buildArrayLoop(fparams);
    Expression *e = new NegExp(0, ex1);
    return e;
}

Expression *ComExp::buildArrayLoop(Arguments *fparams)
{
    Expression *ex1 = e1->buildArrayLoop(fparams);
    Expression *e = new ComExp(0, ex1);
    return e;
}

#define X(Str) \
Expression *Str##Exp::buildArrayLoop(Arguments *fparams)    \
{                               \
    /* Evaluate assign expressions left to right        \
     */                             \
    Expression *ex1 = e1->buildArrayLoop(fparams);      \
    Expression *ex2 = e2->buildArrayLoop(fparams);      \
    Expression *e = new Str##Exp(0, ex1, ex2);          \
    return e;                           \
}

X(Add)
X(Min)
X(Mul)
X(Div)
X(Mod)
X(Xor)
X(And)
X(Or)

#undef X