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#include <qv4unop_p.h>
#include <qv4assembler_p.h>

#if ENABLE(ASSEMBLER)

using namespace QV4;
using namespace JIT;

#define stringIfyx(s) #s
#define stringIfy(s) stringIfyx(s)
#define setOp(operation) \
    do { call = operation; name = stringIfy(operation); } while (0)

void Unop::generate(IR::Expr *source, IR::Expr *target)
{
    Runtime::UnaryOperation call = 0;
    const char *name = 0;
    switch (op) {
    case IR::OpNot:
        generateNot(source, target);
        return;
    case IR::OpUMinus:
        generateUMinus(source, target);
        return;
    case IR::OpUPlus: setOp(Runtime::uPlus); break;
    case IR::OpCompl:
        generateCompl(source, target);
        return;
    case IR::OpIncrement: setOp(Runtime::increment); break;
    case IR::OpDecrement: setOp(Runtime::decrement); break;
    default:
        Q_UNREACHABLE();
    } // switch

    if (call) {
        as->generateFunctionCallImp(target, name, call, Assembler::PointerToValue(source));
    }
}

void Unop::generateUMinus(IR::Expr *source, IR::Expr *target)
{
    IR::Temp *targetTemp = target->asTemp();
    if (source->type == IR::SInt32Type) {
        Assembler::RegisterID tReg = Assembler::ScratchRegister;
        if (targetTemp && targetTemp->kind == IR::Temp::PhysicalRegister)
            tReg = (Assembler::RegisterID) targetTemp->index;
        Assembler::RegisterID sReg = as->toInt32Register(source, tReg);
        as->move(sReg, tReg);
        as->neg32(tReg);
        if (!targetTemp || targetTemp->kind != IR::Temp::PhysicalRegister)
            as->storeInt32(tReg, target);
        return;
    }

    as->generateFunctionCallImp(target, "Runtime::uMinus", Runtime::uMinus, Assembler::PointerToValue(source));
}

void Unop::generateNot(IR::Expr *source, IR::Expr *target)
{
    IR::Temp *targetTemp = target->asTemp();
    if (source->type == IR::BoolType) {
        Assembler::RegisterID tReg = Assembler::ScratchRegister;
        if (targetTemp && targetTemp->kind == IR::Temp::PhysicalRegister)
            tReg = (Assembler::RegisterID) targetTemp->index;
        as->xor32(Assembler::TrustedImm32(0x1), as->toInt32Register(source, tReg), tReg);
        if (!targetTemp || targetTemp->kind != IR::Temp::PhysicalRegister)
            as->storeBool(tReg, target);
        return;
    } else if (source->type == IR::SInt32Type) {
        Assembler::RegisterID tReg = Assembler::ScratchRegister;
        if (targetTemp && targetTemp->kind == IR::Temp::PhysicalRegister)
            tReg = (Assembler::RegisterID) targetTemp->index;
        as->compare32(Assembler::Equal,
                      as->toInt32Register(source, Assembler::ScratchRegister), Assembler::TrustedImm32(0),
                      tReg);
        if (!targetTemp || targetTemp->kind != IR::Temp::PhysicalRegister)
            as->storeBool(tReg, target);
        return;
    } else if (source->type == IR::DoubleType) {
        // ###
    }
    // ## generic implementation testing for int/bool

    as->generateFunctionCallImp(target, "Runtime::uNot", Runtime::uNot, Assembler::PointerToValue(source));
}

void Unop::generateCompl(IR::Expr *source, IR::Expr *target)
{
    IR::Temp *targetTemp = target->asTemp();
    if (source->type == IR::SInt32Type) {
        Assembler::RegisterID tReg = Assembler::ScratchRegister;
        if (targetTemp && targetTemp->kind == IR::Temp::PhysicalRegister)
            tReg = (Assembler::RegisterID) targetTemp->index;
        as->xor32(Assembler::TrustedImm32(0xffffffff), as->toInt32Register(source, tReg), tReg);
        if (!targetTemp || targetTemp->kind != IR::Temp::PhysicalRegister)
            as->storeInt32(tReg, target);
        return;
    }
    as->generateFunctionCallImp(target, "Runtime::complement", Runtime::complement, Assembler::PointerToValue(source));
}

#endif