示例#1
0
void
CodeGeneratorX86::visitStoreTypedArrayElementStatic(LStoreTypedArrayElementStatic* ins)
{
    MStoreTypedArrayElementStatic* mir = ins->mir();
    Scalar::Type accessType = mir->accessType();
    Register ptr = ToRegister(ins->ptr());
    const LAllocation* value = ins->value();

    canonicalizeIfDeterministic(accessType, value);

    uint32_t offset = mir->offset();
    MOZ_ASSERT_IF(mir->needsBoundsCheck(), offset == 0);

    Label rejoin;
    if (mir->needsBoundsCheck()) {
        MOZ_ASSERT(offset == 0);
        masm.cmpPtr(ptr, ImmWord(mir->length()));
        masm.j(Assembler::AboveOrEqual, &rejoin);
    }

    Operand dstAddr(ptr, int32_t(mir->base().asValue()) + int32_t(offset));
    switch (accessType) {
      case Scalar::Int8:
      case Scalar::Uint8Clamped:
      case Scalar::Uint8:
        masm.movbWithPatch(ToRegister(value), dstAddr);
        break;
      case Scalar::Int16:
      case Scalar::Uint16:
        masm.movwWithPatch(ToRegister(value), dstAddr);
        break;
      case Scalar::Int32:
      case Scalar::Uint32:
        masm.movlWithPatch(ToRegister(value), dstAddr);
        break;
      case Scalar::Float32:
        masm.vmovssWithPatch(ToFloatRegister(value), dstAddr);
        break;
      case Scalar::Float64:
        masm.vmovsdWithPatch(ToFloatRegister(value), dstAddr);
        break;
      default:
        MOZ_CRASH("unexpected type");
    }

    if (rejoin.used())
        masm.bind(&rejoin);
}
void
CodeGeneratorX86::visitStoreTypedArrayElementStatic(LStoreTypedArrayElementStatic* ins)
{
    MStoreTypedArrayElementStatic* mir = ins->mir();
    Scalar::Type accessType = mir->accessType();
    Register ptr = ToRegister(ins->ptr());
    const LAllocation* value = ins->value();
    uint32_t offset = mir->offset();

    if (!mir->needsBoundsCheck()) {
        Operand dstAddr(ptr, int32_t(mir->base().asValue()) + int32_t(offset));
        store(accessType, value, dstAddr);
        return;
    }

    MOZ_ASSERT(offset == 0);
    masm.cmpPtr(ptr, ImmWord(mir->length()));
    Label rejoin;
    masm.j(Assembler::AboveOrEqual, &rejoin);

    Operand dstAddr(ptr, int32_t(mir->base().asValue()));
    store(accessType, value, dstAddr);
    masm.bind(&rejoin);
}