73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <android-base/logging.h>
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#include "base/casts.h"
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#include "jni.h"
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namespace art {
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// Make the array volatile, which is apparently making the C compiler
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// use FP registers in the method below.
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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 };
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extern "C" JNIEXPORT void JNICALL Java_Main_holdFpTemporaries(JNIEnv* env, jclass cls) {
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jmethodID mid = env->GetStaticMethodID(cls, "caller", "(IIJ)V");
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CHECK(mid != nullptr);
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// Load values from the arrays, which will be loaded in callee-save FP registers.
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double a = array[0];
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double b = array[1];
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double c = array[2];
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double d = array[3];
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double e = array[4];
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double f = array[5];
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double g = array[6];
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double h = array[7];
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double i = array[8];
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double j = array[9];
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double k = array[10];
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double l = array[11];
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env->CallStaticVoidMethod(cls, mid, 1, 1, 1L);
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// Load it in a temporary to please C compiler with bit_cast.
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double temp = array[0];
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CHECK_EQ(bit_cast<int64_t>(a), bit_cast<int64_t>(temp));
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temp = array[1];
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CHECK_EQ(bit_cast<int64_t>(b), bit_cast<int64_t>(temp));
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temp = array[2];
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CHECK_EQ(bit_cast<int64_t>(c), bit_cast<int64_t>(temp));
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temp = array[3];
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CHECK_EQ(bit_cast<int64_t>(d), bit_cast<int64_t>(temp));
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temp = array[4];
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CHECK_EQ(bit_cast<int64_t>(e), bit_cast<int64_t>(temp));
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temp = array[5];
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CHECK_EQ(bit_cast<int64_t>(f), bit_cast<int64_t>(temp));
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temp = array[6];
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CHECK_EQ(bit_cast<int64_t>(g), bit_cast<int64_t>(temp));
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temp = array[7];
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CHECK_EQ(bit_cast<int64_t>(h), bit_cast<int64_t>(temp));
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temp = array[8];
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CHECK_EQ(bit_cast<int64_t>(i), bit_cast<int64_t>(temp));
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temp = array[9];
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CHECK_EQ(bit_cast<int64_t>(j), bit_cast<int64_t>(temp));
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temp = array[10];
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CHECK_EQ(bit_cast<int64_t>(k), bit_cast<int64_t>(temp));
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temp = array[11];
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CHECK_EQ(bit_cast<int64_t>(l), bit_cast<int64_t>(temp));
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}
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} // namespace art
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