src/compiler/RuntimeUtilities.cc

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "Dalvik.h"
#include "CompilerInternals.h"

/* FIXME - codegen helper functions, move to art runtime proper */

/*
 * Float/double conversion requires clamping to min and max of integer form.  If
 * target doesn't support this normally, use these.
 */
s8 artD2L(double d)
{
    static const double kMaxLong = (double)(s8)0x7fffffffffffffffULL;
    static const double kMinLong = (double)(s8)0x8000000000000000ULL;
    if (d >= kMaxLong)
        return (s8)0x7fffffffffffffffULL;
    else if (d <= kMinLong)
        return (s8)0x8000000000000000ULL;
    else if (d != d) // NaN case
        return 0;
    else
        return (s8)d;
}

s8 artF2L(float f)
{
    static const float kMaxLong = (float)(s8)0x7fffffffffffffffULL;
    static const float kMinLong = (float)(s8)0x8000000000000000ULL;
    if (f >= kMaxLong)
        return (s8)0x7fffffffffffffffULL;
    else if (f <= kMinLong)
        return (s8)0x8000000000000000ULL;
    else if (f != f) // NaN case
        return 0;
    else
        return (s8)f;
}