dvander@39: /* vim: set ts=4 sw=4 tw=99 et:
dvander@39:  *
dvander@0:  * Copyright (C) 2012 David Anderson
dvander@0:  *
dvander@0:  * This file is part of JITCraft.
dvander@0:  *
dvander@0:  * JITCraft is free software: you can redistribute it and/or modify it under
dvander@0:  * the terms of the GNU General Public License as published by the Free
dvander@0:  * Software Foundation, either version 3 of the License, or (at your option)
dvander@0:  * any later version.
dvander@0:  * 
dvander@0:  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
dvander@0:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
dvander@0:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
dvander@0:  *
dvander@0:  * You should have received a copy of the GNU General Public License along with
dvander@0:  * JITCraft. If not, see http://www.gnu.org/licenses/.
dvander@0:  */
danderson@91: #include <string.h>
dvander@0: #include "Interpreter.h"
dvander@0: #include "Modules.h"
dvander@0: #include "Zone.h"
dvander@0: #include "Types.h"
dvander@12: #include "Array.h"
dvander@14: #include "Reference.h"
dvander@69: #include "Strings.h"
dvander@85: #include "Environments.h"
dvander@147: #include "Structures.h"
dvander@195: #include "NativeTable.h"
dvander@28: #include "Heap-inl.h"
dvander@0: 
dvander@59: using namespace ke;
dvander@0: 
dvander@0: #define PUSH_I32(top, value)    \
dvander@0:     do {                        \
dvander@0:         top.sp->i32 = value;    \
dvander@0:         top.sp++;               \
dvander@0:    } while (0)
dvander@0: 
dvander@4: #define PUSH_F(top, value)      \
dvander@4:     do {                        \
dvander@4:         top.sp->f = value;      \
dvander@4:         top.sp++;               \
dvander@4:    } while (0)
dvander@4: 
dvander@0: static inline int
dvander@0: POP_I32(Top &top)
dvander@0: {
dvander@0:     int value = top.sp[-1].i32;
dvander@0:     top.sp--;
dvander@0:     return value;
dvander@0: }
dvander@0: 
dvander@4: static inline float
dvander@4: POP_F(Top &top)
dvander@4: {
dvander@4:     float value = top.sp[-1].f;
dvander@4:     top.sp--;
dvander@4:     return value;
dvander@4: }
dvander@4: 
dvander@77: // Pawn's original semantics specify some kind of floor operation, so
dvander@77: // (8 / -3 == -3) and (-8 / 3 == -1). The SourcePawn 1 compiler (spcomp) uses
dvander@77: // the upstream algorithm when constant folding. However the SourcePawn 1 JIT
dvander@77: // does not. My guess is that Borja freaked out seeing the 13-instruction x86
dvander@77: // sequence necessary to get this functionality (I vaguely recall a thread
dvander@77: // where we discussed this with Mark Peter? But the ITB forums are gone...),
dvander@77: // and we just decided to break the damn thing. So SP1 was inconsistent, but
dvander@77: // we are not. And for completeness, we assert that the C compiler does the
dvander@77: // right thing, since C89 leaves it unspecified.
dvander@77: STATIC_ASSERT(8 / -3 == -2);
dvander@77: STATIC_ASSERT(-8 / 3 == -2);
dvander@77: 
dvander@0: static inline bool
dvander@14: PushNewRef(Zone *zone, Top &top, void *location, Heap::Tenure tenure)
dvander@14: {
dvander@14:     Reference *ref = Reference::NewStack(zone, location, tenure);
dvander@14:     if (!ref)
dvander@14:         return false;
dvander@14:     top.sp->ref = ref;
dvander@14:     top.sp++;
dvander@14:     return true;
dvander@14: }
dvander@14: 
dvander@152: static void
dvander@157: GetElement(Array *array, int index, LocalSlot *vp)
dvander@157: {
dvander@157:     if (array->type()->contained()->isTraceable()) {
dvander@157:         vp->obj = array->readObject(index);
dvander@157:         return;
dvander@157:     }
dvander@157: 
dvander@157:     switch (array->type()->contained()->pod()) {
dvander@157:       case PrimitiveType_Float:
dvander@157:         vp->f = array->readFloat(index);
dvander@157:         break;
dvander@157: 
dvander@157:       case PrimitiveType_Char:
dvander@157:         vp->i32 = array->readChar(index);
dvander@157:         break;
dvander@157: 
dvander@157:       default:
dvander@157:         assert(array->type()->contained()->pod() == PrimitiveType_Int32);
dvander@157:         vp->i32 = array->readInt32(index);
dvander@157:         break;
dvander@157:     }
dvander@157: }
dvander@157: 
dvander@157: static void
dvander@157: SetElement(Zone *zone, Array *array, int index, const LocalSlot &v)
dvander@157: {
dvander@157:     if (array->type()->contained()->isTraceable()) {
dvander@157:         array->writeObject(zone, index, v.obj);
dvander@157:         return;
dvander@157:     }
dvander@157: 
dvander@157:     switch (array->type()->contained()->pod()) {
dvander@157:       case PrimitiveType_Float:
dvander@157:         array->writeFloat(index, v.f);
dvander@157:         break;
dvander@157: 
dvander@157:       case PrimitiveType_Char:
dvander@157:         array->writeChar(index, v.i32);
dvander@157:         break;
dvander@157: 
dvander@157:       default:
dvander@157:         assert(array->type()->contained()->pod() == PrimitiveType_Int32);
dvander@157:         array->writeInt32(index, v.i32);
dvander@157:         break;
dvander@157:     }
dvander@157: }
dvander@157: 
dvander@157: static void
dvander@196: FetchField(Struct *obj, Descriptor *desc, LocalSlot *vp)
dvander@152: {
dvander@152:     // :TODO: assert no GC.
dvander@152:     if (desc->type()->isTraceable()) {
dvander@152:         vp->obj = obj->get<Object *>(desc);
dvander@157:         return;
dvander@157:     }
dvander@152: 
dvander@157:     switch (desc->type()->pod()) {
dvander@157:       case PrimitiveType_Float:
dvander@157:         vp->f = obj->get<float>(desc);
dvander@157:         break;
dvander@157: 
dvander@157:       default:
dvander@157:         assert(desc->type()->pod() == PrimitiveType_Int32);
dvander@157:         vp->i32 = obj->get<int>(desc);
dvander@157:         break;
dvander@152:     }
dvander@152: }
dvander@152: 
dvander@152: static void
dvander@152: GetField(Struct *obj, unsigned index, LocalSlot *vp)
dvander@152: {
dvander@195:     StructType *type = StructType::cast(obj->map()->type());
dvander@195:     Descriptor *desc = Descriptor::cast(type->fields()->at(index));
dvander@196:     FetchField(obj, desc, vp);
dvander@195: }
dvander@195: 
dvander@195: static void
dvander@195: GetGlobal(Zone *zone, Handle<Struct> obj, Handle<String> name, LocalSlot *vp)
dvander@195: {
dvander@195:     Local<StructType> type(zone, StructType::cast(obj->map()->type()));
dvander@195:     Local<Descriptor> desc(zone, type->lookupField(name, NULL));
dvander@196:     FetchField(obj, desc, vp);
dvander@152: }
dvander@152: 
dvander@152: static void
dvander@196: StoreField(Zone *zone, Struct *obj, Descriptor *desc, const LocalSlot &v)
dvander@152: {
dvander@152:     // :TODO: assert no GC.
dvander@152:     if (desc->type()->isTraceable()) {
dvander@152:         obj->set(zone, desc, v.obj);
dvander@157:         return;
dvander@157:     }
dvander@152: 
dvander@157:     switch (desc->type()->pod()) {
dvander@157:       case PrimitiveType_Float:
dvander@157:         obj->set<float>(desc, v.f);
dvander@157:         break;
dvander@157: 
dvander@157:       default:
dvander@157:         assert(desc->type()->pod() == PrimitiveType_Int32);
dvander@157:         obj->set<int>(desc, v.i32);
dvander@157:         break;
dvander@152:     }
dvander@152: }
dvander@152: 
dvander@152: static void
dvander@152: SetField(Zone *zone, Struct *obj, unsigned index, const LocalSlot &v)
dvander@152: {
dvander@195:     StructType *type = StructType::cast(obj->map()->type());
dvander@195:     Descriptor *desc = Descriptor::cast(type->fields()->at(index));
dvander@196:     StoreField(zone, obj, desc, v);
dvander@195: }
dvander@195: 
dvander@195: static void
dvander@195: SetGlobal(Zone *zone, Handle<Struct> obj, Handle<String> name, LocalSlot &v)
dvander@195: {
dvander@195:     Local<StructType> type(zone, StructType::cast(obj->map()->type()));
dvander@195:     Local<Descriptor> desc(zone, type->lookupField(name, NULL));
dvander@196:     StoreField(zone, obj, desc, v);
dvander@152: }
dvander@152: 
dvander@68: static bool
dvander@68: InvokeNative(Zone *zone, Handle<Native> native, void *identity, LocalSlot *args, unsigned argc,
dvander@68:              int *result)
dvander@68: {
dvander@68:     NativeArgs guard;
dvander@68: 
dvander@195:     void *address = zone->nativeTable()->address(native->index());
dvander@195:     if (!address) {
dvander@195:         Local<String> name(zone, zone->nativeTable()->name(native->index()));
dvander@195:         zone->reportError(Message_NativeNotBound, name->chars());
dvander@195:         return false;
dvander@195:     }
dvander@195: 
dvander@68:     if (!zone->stack().pushNativeFrame(native, guard, argc + 1))
dvander@68:         return false;
dvander@68: 
dvander@68:     intptr_t *cells = guard.args();
dvander@68: 
dvander@68:     // params[0] == argc, in ISPE
dvander@68:     cells[0] = argc;
dvander@68: 
dvander@68:     // Pass the formal arguments.
dvander@195:     Local<FunctionType> type(zone, native->type());
dvander@68:     Local<Type> param(zone);
dvander@68:     for (unsigned i = 0; i < type->parameters()->length(); i++) {
dvander@68:         param = type->parameterAt(i);
dvander@68:         
dvander@68:         // For floats, we rely on the aliasing of |i32| and |f|.
dvander@68:         LocalSlot &arg = args[-int(i) - 1];
dvander@68:         if (param->isInt32() || param->isFloat()) {
dvander@68:             cells[i + 1] = arg.i32;
dvander@68:         } else if (param->isReference()) {
dvander@68:             cells[i + 1] = reinterpret_cast<intptr_t>(arg.ref->location());
dvander@68:         } else {
dvander@68:             assert(param->isArray());
dvander@188:             cells[i + 1] = reinterpret_cast<intptr_t>(arg.array->bytes());
dvander@68:         }
dvander@68:     }
dvander@68: 
dvander@68:     // For variadic arguments, the compiler left either arrays or references.
dvander@68:     for (unsigned i = type->parameters()->length(); i < argc; i++) {
dvander@68:         LocalSlot &arg = args[-int(i) - 1];
dvander@68: 
dvander@68:         if (arg.obj->is(MapKind_Reference)) {
dvander@68:             cells[i + 1] = reinterpret_cast<intptr_t>(arg.ref->location());
dvander@68:         } else {
dvander@68:             assert(arg.obj->is(MapKind_Array));
dvander@188:             cells[i + 1] = reinterpret_cast<intptr_t>(arg.array->bytes());
dvander@68:         }
dvander@68:     }
dvander@68: 
dvander@68:     typedef intptr_t (*INVOKE)(void *, intptr_t *);
dvander@195:     INVOKE invoke = (INVOKE)address;
dvander@68:     *result = invoke(identity, cells);
dvander@68: 
dvander@69:     return !zone->hasPendingException();
dvander@68: }
dvander@68: 
dvander@0: bool
dvander@59: ke::Interpret(Zone *zone, Frame *entryFrame, LocalSlot *result)
dvander@0: {
dvander@42:     Top &top = *zone->stack().top();
dvander@69:     if (!entryFrame)
dvander@69:         entryFrame = top.fp;
dvander@69: 
dvander@47:     LocalSlot *locals = entryFrame->locals();
dvander@0: 
dvander@0:     for (;;) {
dvander@0:         Opcode op = Opcode(*top.pc);
dvander@174: 
dvander@174:         if (OpcodeInfo[op].nuses > 0)
dvander@174:             assert(top.sp - OpcodeInfo[op].nuses >= top.fp->stackBase());
dvander@174: 
dvander@0:         switch (op) {
dvander@0: 
dvander@0: case OP_NOP:
dvander@0:     break;
dvander@0: 
dvander@0: case OP_INT:
dvander@0:     PUSH_I32(top, READ_INT32(top.pc));
dvander@0:     break;
dvander@0: 
dvander@4: case OP_FLOAT:
dvander@4:     PUSH_F(top, READ_FLOAT(top.pc));
dvander@4:     break;
dvander@4: 
dvander@0: case OP_RETURN:
dvander@72: case OP_RETURNVOID:
dvander@72: case OP_STOP:
dvander@0: {
dvander@72:     if (op == OP_RETURN)
dvander@72:         *result = *--top.sp;
dvander@72: 
dvander@69:     if (top.fp == entryFrame)
dvander@69:         goto done;
dvander@0: 
dvander@72:     // This must not GC.
dvander@65:     zone->stack().popInlineFrame();
dvander@47:     locals = top.fp->locals();
dvander@72: 
dvander@72:     if (op == OP_RETURN)
dvander@72:         *top.sp++ = *result;
dvander@72: 
dvander@0:     top.pc += OpcodeInfo[*top.pc].length;
dvander@0:     continue;
dvander@0: }
dvander@0: 
dvander@80: case OP_POP:
dvander@80: {
dvander@80:     top.sp--;
dvander@80:     break;
dvander@80: }
dvander@80: 
dvander@0: case OP_JT:
dvander@0: {
dvander@0:     int value = POP_I32(top);
dvander@0:     if (value) {
dvander@0:         top.pc += READ_INT32(top.pc);
dvander@0:         continue;
dvander@0:     }
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_JF:
dvander@0: {
dvander@0:     int value = POP_I32(top);
dvander@0:     if (!value) {
dvander@0:         top.pc += READ_INT32(top.pc);
dvander@0:         continue;
dvander@0:     }
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_JUMP:
dvander@230: {
dvander@0:     top.pc += READ_INT32(top.pc);
dvander@0:     continue;
dvander@230: }
dvander@230: 
dvander@230: case OP_BREAK:
dvander@230: case OP_CONTINUE:
dvander@230: {
dvander@230:     top.fp->leaveLoop(zone);
dvander@230:     top.pc += READ_INT32(top.pc);
dvander@230:     continue;
dvander@230: }
dvander@0: 
dvander@0: case OP_GETLOCAL:
dvander@0: {
dvander@195:     unsigned slot = READ_UINT32(top.pc);
dvander@195:     assert(slot < top.fp->code()->nlocals());
dvander@0:     *top.sp++ = locals[slot];
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_SETLOCAL:
dvander@0: {
dvander@195:     unsigned slot = READ_UINT32(top.pc);
dvander@195:     assert(slot < top.fp->code()->nlocals());
dvander@0:     locals[slot] = top.sp[-1];
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_ADD:
dvander@0: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 + top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_SUB:
dvander@0: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 - top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_MUL:
dvander@0: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 * top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_DIV:
dvander@0: {
dvander@77:     if (top.sp[-1].i32 == 0) {
dvander@69:         zone->reportError(Message_IntegerDivideByZero);
dvander@69:         goto error;
dvander@69:     }
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 / top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@82: case OP_MOD:
dvander@82: {
dvander@82:     if (top.sp[-1].i32 == 0) {
dvander@82:         zone->reportError(Message_IntegerDivideByZero);
dvander@82:         goto error;
dvander@82:     }
dvander@82:     top.sp[-2].i32 = top.sp[-2].i32 % top.sp[-1].i32;
dvander@82:     top.sp--;
dvander@82:     break;
dvander@82: }
dvander@82: 
dvander@74: case OP_LT:
dvander@74: {
dvander@74:     top.sp[-2].i32 = top.sp[-2].i32 < top.sp[-1].i32;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_LE:
dvander@74: {
dvander@74:     top.sp[-2].i32 = top.sp[-2].i32 <= top.sp[-1].i32;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_GT:
dvander@74: {
dvander@74:     top.sp[-2].i32 = top.sp[-2].i32 > top.sp[-1].i32;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_GE:
dvander@74: {
dvander@74:     top.sp[-2].i32 = top.sp[-2].i32 >= top.sp[-1].i32;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_EQ:
dvander@74: {
dvander@74:     top.sp[-2].i32 = (top.sp[-2].i32 == top.sp[-1].i32);
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_NE:
dvander@74: {
dvander@74:     top.sp[-2].i32 = (top.sp[-2].i32 != top.sp[-1].i32);
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@4: case OP_ADD_F:
dvander@4: {
dvander@77:     top.sp[-2].f = top.sp[-2].f + top.sp[-1].f;
dvander@77:     top.sp--;
dvander@4:     break;
dvander@4: }
dvander@4: 
dvander@4: case OP_SUB_F:
dvander@4: {
dvander@77:     top.sp[-2].f = top.sp[-2].f - top.sp[-1].f;
dvander@77:     top.sp--;
dvander@4:     break;
dvander@4: }
dvander@4: 
dvander@4: case OP_MUL_F:
dvander@4: {
dvander@77:     top.sp[-2].f = top.sp[-2].f * top.sp[-1].f;
dvander@77:     top.sp--;
dvander@4:     break;
dvander@4: }
dvander@4: 
dvander@4: case OP_DIV_F:
dvander@4: {
dvander@77:     top.sp[-2].f = top.sp[-2].f / top.sp[-1].f;
dvander@77:     top.sp--;
dvander@4:     break;
dvander@4: }
dvander@4: 
dvander@74: case OP_LT_F:
dvander@74: {
dvander@74:     top.sp[-2].f = top.sp[-2].f < top.sp[-1].f;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_LE_F:
dvander@74: {
dvander@74:     top.sp[-2].f = top.sp[-2].f <= top.sp[-1].f;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_GT_F:
dvander@74: {
dvander@74:     top.sp[-2].f = top.sp[-2].f > top.sp[-1].f;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_GE_F:
dvander@74: {
dvander@74:     top.sp[-2].f = top.sp[-2].f >= top.sp[-1].f;
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_EQ_F:
dvander@74: {
dvander@74:     top.sp[-2].i32 = (top.sp[-2].f == top.sp[-1].f);
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@74: case OP_NE_F:
dvander@74: {
dvander@74:     top.sp[-2].i32 = (top.sp[-2].f != top.sp[-1].f);
dvander@74:     top.sp--;
dvander@74:     break;
dvander@74: }
dvander@74: 
dvander@8: case OP_SHL:
dvander@8: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 << top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@8:     break;
dvander@8: }
dvander@8: 
dvander@8: case OP_SHR:
dvander@8: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 >> top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@8:     break;
dvander@8: }
dvander@8: 
dvander@8: case OP_USHR:
dvander@8: {
dvander@207:     top.sp[-2].i32 = unsigned(top.sp[-2].i32) >> unsigned(top.sp[-1].i32);
dvander@77:     top.sp--;
dvander@8:     break;
dvander@8: }
dvander@8: 
dvander@8: case OP_BITAND:
dvander@8: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 & top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@8:     break;
dvander@8: }
dvander@8: 
dvander@8: case OP_BITOR:
dvander@8: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 | top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@8:     break;
dvander@8: }
dvander@8: 
dvander@8: case OP_BITXOR:
dvander@8: {
dvander@77:     top.sp[-2].i32 = top.sp[-2].i32 ^ top.sp[-1].i32;
dvander@77:     top.sp--;
dvander@8:     break;
dvander@8: }
dvander@8: 
dvander@78: case OP_BITNOT:
dvander@78: {
dvander@78:     top.sp[-1].i32 = ~top.sp[-1].i32;
dvander@78:     break;
dvander@78: }
dvander@78: 
dvander@79: case OP_NOT:
dvander@79: {
dvander@79:     top.sp[-1].i32 = top.sp[-1].i32 ? 0 : 1;
dvander@79:     break;
dvander@79: }
dvander@79: 
dvander@79: case OP_NOT_F:
dvander@79: {
dvander@79:     top.sp[-1].i32 = top.sp[-1].f ? 0 : 1;
dvander@79:     break;
dvander@79: }
dvander@79: 
dvander@80: case OP_NEG:
dvander@79: {
dvander@80:     top.sp[-1].i32 = -top.sp[-1].i32;
dvander@80:     break;
dvander@80: }
dvander@80: 
dvander@80: case OP_NEG_F:
dvander@80: {
dvander@80:     top.sp[-1].f = -top.sp[-1].f;
dvander@0:     break;
dvander@79: }
dvander@0: 
dvander@73: case OP_CALL:
dvander@0: {
dvander@195:     Local<Function> newFun(zone, Function::cast(top.sp[-1].obj));
dvander@73:     top.sp--;
dvander@73: 
dvander@69:     if (!zone->stack().pushInlineFrame(newFun))
dvander@69:         goto error;
dvander@0: 
dvander@47:     locals = top.fp->locals();
dvander@0:     continue;
dvander@0: }
dvander@0: 
dvander@0: case OP_GETARG:
dvander@0: {
dvander@0:     unsigned slot = READ_UINT32(top.pc);
dvander@47:     *top.sp++ = top.fp->arg(slot);
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@0: case OP_SETARG:
dvander@0: {
dvander@0:     unsigned slot = READ_UINT32(top.pc);
dvander@174:     top.fp->arg(slot) = top.sp[-1];
dvander@0:     break;
dvander@0: }
dvander@0: 
dvander@158: case OP_GETELEM:
dvander@0: {
dvander@158:     Array *array = Array::cast(top.sp[-2].obj);
dvander@0:     int index = top.sp[-1].i32;
dvander@158: 
dvander@155:     if (index < 0 || unsigned(index) >= array->length()) {
dvander@155:         zone->reportError(Message_ArrayIndexOutOfBounds, index, array->length());
dvander@69:         goto error;
dvander@69:     }
dvander@0: 
dvander@157:     GetElement(array, index, &top.sp[-2]);
dvander@21:     top.sp--;
dvander@21:     break;
dvander@21: }
dvander@21: 
dvander@157: case OP_SETELEM:
dvander@0: {
dvander@157:     Array *array = Array::cast(top.sp[-3].obj);
dvander@0:     int index = top.sp[-2].i32;
dvander@158: 
dvander@158:     if (index < 0 || unsigned(index) >= array->length()) {
dvander@158:         zone->reportError(Message_ArrayIndexOutOfBounds, index, array->length());
dvander@158:         goto error;
dvander@158:     }
dvander@158: 
dvander@157:     SetElement(zone, array, index, top.sp[-1]);
dvander@7:     top.sp[-3] = top.sp[-1];
dvander@7:     top.sp -= 2;
dvander@7:     break;
dvander@7: }
dvander@7: 
dvander@4: case OP_CVT_I2F:
dvander@4: {
dvander@4:     int ival = POP_I32(top);
dvander@4:     float fval = (float)ival;
dvander@4:     PUSH_F(top, fval);
dvander@4:     break;
dvander@4: }
dvander@4: 
dvander@208: case OP_CVT_I2B:
dvander@208: {
dvander@208:     top.sp[-1].i32 = !!top.sp[-1].i32;
dvander@208:     break;
dvander@208: }
dvander@208: 
dvander@234: case OP_DUPARRAY:
dvander@234: {
dvander@234:     Local<Array> src(zone, Array::cast(top.sp[-1].obj));
dvander@234:     top.sp[-1].obj = Array::DeepCopy(zone, src, Heap::Tenure_Default);
dvander@234:     if (!top.sp[-1].obj)
dvander@234:         goto error;
dvander@234:     break;
dvander@234: }
dvander@234: 
dvander@185: case OP_NEWFIXED:
dvander@12: {
dvander@85:     Heap::Tenure tenure = (Heap::Tenure)top.pc[1];
dvander@85:     Local<ArrayMap> map(zone, ArrayMap::cast(top.fp->code()->map(READ_UINT32(top.pc + 1))));
dvander@187:     Array *array = Array::NewFixed(zone, map, tenure);
dvander@185:     if (!array)
dvander@185:         goto error;
dvander@185:     top.sp->obj = array;
dvander@185:     top.sp++;
dvander@185:     break;
dvander@185: }
dvander@185: 
dvander@185: case OP_NEWEMPTY:
dvander@185: {
dvander@185:     Heap::Tenure tenure = (Heap::Tenure)top.pc[1];
dvander@185:     Local<ArrayMap> map(zone, ArrayMap::cast(top.fp->code()->map(READ_UINT32(top.pc + 1))));
dvander@187:     Array *array = Array::NewEmpty(zone, map, tenure);
dvander@187:     if (!array)
dvander@187:         goto error;
dvander@187:     top.sp->obj = array;
dvander@187:     top.sp++;
dvander@187:     break;
dvander@187: }
dvander@187: 
dvander@187: case OP_NEWSIZED:
dvander@187: {
dvander@187:     Heap::Tenure tenure = (Heap::Tenure)top.pc[1];
dvander@187:     Local<ArrayMap> map(zone, ArrayMap::cast(top.fp->code()->map(READ_UINT32(top.pc + 1))));
dvander@187:     assert(map->type()->levels() < MAX_ARRAY_DEPTH);
dvander@187: 
dvander@187:     int dims[MAX_ARRAY_DEPTH];
dvander@187:     for (unsigned i = map->type()->levels() - 1; i < map->type()->levels(); i--)
dvander@187:         dims[i] = POP_I32(top);
dvander@187: 
dvander@187:     Array *array = Array::NewSized(zone, map, dims, tenure);
dvander@69:     if (!array)
dvander@69:         goto error;
dvander@12:     top.sp->obj = array;
dvander@12:     top.sp++;
dvander@12:     break;
dvander@12: }
dvander@12: 
dvander@147: case OP_NEWSTRUCT:
dvander@147: {
dvander@147:     Heap::Tenure tenure = (Heap::Tenure)top.pc[1];
dvander@147:     Local<StructMap> map(zone, StructMap::cast(top.fp->code()->map(READ_UINT32(top.pc + 1))));
dvander@147:     top.sp->obj = Struct::New(zone, map, tenure);
dvander@147:     if (!top.sp->obj)
dvander@147:         goto error;
dvander@147:     top.sp++;
dvander@147:     break;
dvander@147: }
dvander@147: 
dvander@12: case OP_SAVELIFO:
dvander@10: {
dvander@10:     unsigned slot = READ_UINT32(top.pc);
dvander@42:     locals[slot].address = zone->heap().lifoPosition();
dvander@12:     break;
dvander@12: }
dvander@12: 
dvander@12: case OP_UNWINDLIFO:
dvander@12: {
dvander@12:     unsigned slot = READ_UINT32(top.pc);
dvander@42:     zone->heap().unwindLifo(locals[slot].address);
dvander@10:     break;
dvander@10: }
dvander@10: 
dvander@14: case OP_VARREF_LIFO:
dvander@14: {
dvander@14:     unsigned slot = READ_UINT32(top.pc);
dvander@69:     if (!PushNewRef(zone, top, &locals[slot], Heap::Tenure_Stack))
dvander@69:         goto error;
dvander@14:     break;
dvander@14: }
dvander@14: 
dvander@14: case OP_ARGREF_LIFO:
dvander@14: {
dvander@14:     unsigned slot = READ_UINT32(top.pc);
dvander@69:     if (!PushNewRef(zone, top, &top.fp->arg(slot), Heap::Tenure_Stack))
dvander@69:         goto error;
dvander@14:     break;
dvander@14: }
dvander@14: 
dvander@16: case OP_SLOTREF_LIFO:
dvander@16: {
dvander@42:     Reference *ref = Reference::NewStack(zone, top.sp[-1], Heap::Tenure_Stack);
dvander@69:     if (!ref)
dvander@69:         goto error;
dvander@16:     top.sp[-1].ref = ref;
dvander@16:     break;
dvander@16: }
dvander@16: 
dvander@14: case OP_GETREF_I:
dvander@14: {
dvander@14:     top.sp[-1].i32 = top.sp[-1].ref->getInt();
dvander@14:     break;
dvander@14: }
dvander@14: 
dvander@14: case OP_SETREF_I:
dvander@14: {
dvander@14:     top.sp[-2].ref->setInt(top.sp[-1].i32);
dvander@14:     top.sp[-2].i32 = top.sp[-1].i32;
dvander@23:     top.sp--;
dvander@14:     break;
dvander@14: }
dvander@14: 
dvander@14: case OP_GETREF_F:
dvander@14: {
dvander@14:     top.sp[-1].f = top.sp[-1].ref->getFloat();
dvander@14:     break;
dvander@14: }
dvander@14: 
dvander@14: case OP_SETREF_F:
dvander@14: {
dvander@14:     top.sp[-2].ref->setFloat(top.sp[-1].f);
dvander@14:     top.sp[-2].f = top.sp[-1].f;
dvander@14:     break;
dvander@14: }
dvander@14: 
dvander@21: case OP_OBJECT:
dvander@21: {
dvander@47:     top.sp->obj = top.fp->code()->object(READ_UINT32(top.pc));
dvander@21:     top.sp++;
dvander@21:     break;
dvander@21: }
dvander@21: 
dvander@152: case OP_COPYARRAY:
dvander@21: {
dvander@21:     // Note for this assignment opcode, we return the left-hand side, not the
dvander@21:     // right, since in this case the result of the expression could be different.
dvander@178:     Local<Array> left(zone, Array::cast(top.sp[-2].array));
dvander@178:     Local<Array> right(zone, Array::cast(top.sp[-1].array));
dvander@234:     if (!Array::ShallowCopy(zone, left, right))
dvander@69:         goto error;
dvander@21:     top.sp--;
dvander@21:     break;
dvander@21: }
dvander@21: 
dvander@22: case OP_DUP:
dvander@22: {
dvander@23:     top.sp++;
dvander@23:     top.sp[-1] = top.sp[-2];
dvander@22:     break;
dvander@22: }
dvander@22: 
dvander@22: case OP_DUP2:
dvander@22: {
dvander@23:     top.sp += 2;
dvander@23:     top.sp[-2] = top.sp[-4];
dvander@23:     top.sp[-1] = top.sp[-3];
dvander@23:     break;
dvander@23: }
dvander@23: 
dvander@23: case OP_SWAP:
dvander@23: {
dvander@23:     LocalSlot slot = top.sp[-2];
dvander@23:     top.sp[-2] = top.sp[-1];
dvander@23:     top.sp[-1] = slot;
dvander@23:     break;
dvander@23: }
dvander@23: 
dvander@23: case OP_ROLL3:
dvander@23: {
dvander@23:     LocalSlot slot = top.sp[-3];
dvander@23:     top.sp[-3] = top.sp[-2];
dvander@23:     top.sp[-2] = top.sp[-1];
dvander@23:     top.sp[-1] = slot;
dvander@23:     break;
dvander@23: }
dvander@23: 
dvander@23: case OP_PICK2:
dvander@23: {
dvander@23:     top.sp++;
dvander@23:     top.sp[-1] = top.sp[-3];
dvander@23:     break;
dvander@23: }
dvander@23: 
dvander@23: case OP_PICK3:
dvander@23: {
dvander@23:     top.sp++;
dvander@23:     top.sp[-1] = top.sp[-4];
dvander@22:     break;
dvander@22: }
dvander@22: 
dvander@68: case OP_CALLNATIVE:
dvander@68: {
dvander@195:     unsigned argc = READ_UINT32(top.pc);
dvander@68: 
dvander@195:     Local<Native> native(zone, Native::cast(top.sp[-1].obj));
dvander@195:     top.sp--;
dvander@68: 
dvander@68:     int result;
dvander@68:     void *nativeIdentity = top.fp->code()->module()->nativeIdentity();
dvander@69:     if (!InvokeNative(zone, native, nativeIdentity, top.sp, argc, &result))
dvander@69:         goto error;
dvander@68: 
dvander@68:     top.sp -= argc;
dvander@68:     PUSH_I32(top, result);
dvander@68:     break;
dvander@68: }
dvander@68: 
dvander@142: case OP_BITS_I2F:
dvander@142: case OP_BITS_F2I:
dvander@142: {
dvander@142:     // Because the stack is a union, these are actually no-ops in the
dvander@142:     // interpreter.
dvander@142:     break;
dvander@142: }
dvander@142: 
dvander@143: case OP_TRUE:
dvander@143: {
dvander@143:     top.sp++;
dvander@143:     top.sp[-1].i32 = 1;
dvander@143:     break;
dvander@143: }
dvander@143: 
dvander@143: case OP_FALSE:
dvander@143: {
dvander@143:     top.sp++;
dvander@143:     top.sp[-1].i32 = 0;
dvander@143:     break;
dvander@143: }
dvander@143: 
dvander@152: case OP_GETFIELD:
dvander@152: {
dvander@152:     Struct *obj = Struct::cast(top.sp[-1].obj);
dvander@152:     GetField(obj, READ_UINT32(top.pc), &top.sp[-1]);
dvander@152:     break;
dvander@152: }
dvander@152: 
dvander@152: case OP_SETFIELD:
dvander@152: {
dvander@152:     Struct *obj = Struct::cast(top.sp[-2].obj);
dvander@152:     SetField(zone, obj, READ_UINT32(top.pc), top.sp[-1]);
dvander@152:     top.sp[-2] = top.sp[-1];
dvander@152:     top.sp--;
dvander@152:     break;
dvander@152: }
dvander@152: 
dvander@152: case OP_COPYSTRUCT:
dvander@152: {
dvander@178:     Local<Struct> left(zone, Struct::cast(top.sp[-2].obj));
dvander@178:     Local<Struct> right(zone, Struct::cast(top.sp[-1].obj));
dvander@234:     if (!Struct::Copy(zone, left, right))
dvander@152:         goto error;
dvander@152:     top.sp[-2].obj = top.sp[-1].obj;
dvander@152:     top.sp--;
dvander@152:     break;
dvander@152: }
dvander@152: 
dvander@172: case OP_TABLESWITCH:
dvander@172: {
dvander@172:     int value = top.sp[-1].i32;
dvander@172:     int low = READ_TABLESWITCH_LOW(top.pc);
dvander@172:     int high = READ_TABLESWITCH_HIGH(top.pc);
dvander@172: 
dvander@172:     top.sp--;
dvander@172: 
dvander@172:     unsigned index = unsigned(value - low);
dvander@172:     unsigned tablesize = TableSwitchEntries(low, high);
dvander@172:     if (index < tablesize) {
dvander@172:         top.pc += OP_TABLESWITCH_LENGTH + OP_JUMP_LENGTH;
dvander@172:         top.pc += index * OP_JUMP_LENGTH;
dvander@172:         continue;
dvander@172:     }
dvander@172:     break;
dvander@172: }
dvander@172: 
dvander@194: case OP_SIZEOF:
dvander@194: {
dvander@194:     Array *array = Array::cast(top.sp[-1].obj);
dvander@194:     top.sp[-1].i32 = array->length();
dvander@194:     break;
dvander@194: }
dvander@194: 
dvander@195: case OP_PUBLIC:
dvander@195: {
dvander@195:     Local<Function> fun(zone, Function::cast(top.sp[-1].obj));
dvander@195:     zone->registerPublic(fun);
dvander@195:     top.sp--;
dvander@195:     break;
dvander@195: }
dvander@195: 
dvander@195: case OP_SETGLOBAL:
dvander@195: {
dvander@195:     Local<Code> code(zone, top.fp->code());
dvander@195:     Local<Struct> obj(zone, code->module()->globals());
dvander@195:     Local<String> name(zone, String::cast(code->strings()->at(READ_UINT32(top.pc))));
dvander@195:     SetGlobal(zone, obj, name, top.sp[-1]);
dvander@195:     break;
dvander@195: }
dvander@195: 
dvander@195: case OP_GETGLOBAL:
dvander@195: {
dvander@195:     Local<Code> code(zone, top.fp->code());
dvander@195:     Local<Struct> obj(zone, code->module()->globals());
dvander@195:     Local<String> name(zone, String::cast(code->strings()->at(READ_UINT32(top.pc))));
dvander@195:     GetGlobal(zone, obj, name, top.sp);
dvander@195:     top.sp++;
dvander@195:     break;
dvander@195: }
dvander@195: 
dvander@230: case OP_ENTERLOOP:
dvander@230: {
dvander@230:     top.fp->enterLoop(zone);
dvander@230:     break;
dvander@230: }
dvander@230: 
dvander@230: case OP_LEAVELOOP:
dvander@230: {
dvander@230:     top.fp->leaveLoop(zone);
dvander@230:     break;
dvander@230: }
dvander@230: 
dvander@0: default:
dvander@0:     assert(false);
dvander@0:     return false;
dvander@0: 
dvander@0:         }
dvander@0: 
dvander@0:         top.pc += OpcodeInfo[op].length;
dvander@174:         assert(top.sp >= top.fp->stackBase());
dvander@0:     }
dvander@0: 
dvander@69: done:
dvander@0:     return true;
dvander@69: 
dvander@69: error:
dvander@69:     // Unwind frames until we can continue.
dvander@69:     while (top.fp != entryFrame)
dvander@69:         zone->stack().popInlineFrame();
dvander@69:     return false;
dvander@0: }