blob: 600f9690ebab2eaf28e64c445a38725b4e0b0a39 [file] [log] [blame]
/*
* Copyright (C) 2017 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 "base/casts.h"
#include "base/logging.h"
#include "jni.h"
namespace art {
// Make the array volatile, which is apparently making the C compiler
// use FP registers in the method below.
volatile double array[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0 };
extern "C" JNIEXPORT void JNICALL Java_Main_holdFpTemporaries(JNIEnv* env, jclass cls) {
jmethodID mid = env->GetStaticMethodID(cls, "caller", "(IIJ)V");
CHECK(mid != nullptr);
// Load values from the arrays, which will be loaded in callee-save FP registers.
double a = array[0];
double b = array[1];
double c = array[2];
double d = array[3];
double e = array[4];
double f = array[5];
double g = array[6];
double h = array[7];
double i = array[8];
double j = array[9];
double k = array[10];
double l = array[11];
env->CallStaticVoidMethod(cls, mid, 1, 1, 1L);
// Load it in a temporary to please C compiler with bit_cast.
double temp = array[0];
CHECK_EQ(bit_cast<int64_t>(a), bit_cast<int64_t>(temp));
temp = array[1];
CHECK_EQ(bit_cast<int64_t>(b), bit_cast<int64_t>(temp));
temp = array[2];
CHECK_EQ(bit_cast<int64_t>(c), bit_cast<int64_t>(temp));
temp = array[3];
CHECK_EQ(bit_cast<int64_t>(d), bit_cast<int64_t>(temp));
temp = array[4];
CHECK_EQ(bit_cast<int64_t>(e), bit_cast<int64_t>(temp));
temp = array[5];
CHECK_EQ(bit_cast<int64_t>(f), bit_cast<int64_t>(temp));
temp = array[6];
CHECK_EQ(bit_cast<int64_t>(g), bit_cast<int64_t>(temp));
temp = array[7];
CHECK_EQ(bit_cast<int64_t>(h), bit_cast<int64_t>(temp));
temp = array[8];
CHECK_EQ(bit_cast<int64_t>(i), bit_cast<int64_t>(temp));
temp = array[9];
CHECK_EQ(bit_cast<int64_t>(j), bit_cast<int64_t>(temp));
temp = array[10];
CHECK_EQ(bit_cast<int64_t>(k), bit_cast<int64_t>(temp));
temp = array[11];
CHECK_EQ(bit_cast<int64_t>(l), bit_cast<int64_t>(temp));
}
} // namespace art