73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
// Copyright 2015, ARM Limited
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of ARM Limited nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "vixl/a64/macro-assembler-a64.h"
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#include "vixl/a64/instructions-a64.h"
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#include "vixl/globals.h"
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using namespace vixl;
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static const int kDefaultIterationsCount = 100000;
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// This program focuses on the emission of branches and veneers.
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int main(int argc, char* argv[]) {
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int iterations = 0;
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switch (argc) {
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case 1: iterations = kDefaultIterationsCount; break;
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case 2: iterations = atoi(argv[1]); break;
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default:
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printf("Usage: %s [#iterations]\n", argv[0]);
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exit(1);
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}
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size_t base_buf_size = iterations * 4 * kInstructionSize;
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MacroAssembler masm(base_buf_size);
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#define __ masm.
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Label target_1, target_2, target_3, target_4;
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for (int i = 0; i < iterations; i++) {
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__ B(&target_1);
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}
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__ Bind(&target_1);
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for (int i = 0; i < iterations; i++) {
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__ B(eq, &target_2);
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}
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__ Bind(&target_2);
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for (int i = 0; i < iterations; i++) {
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__ Cbz(x2, &target_3);
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}
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__ Bind(&target_3);
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for (int i = 0; i < iterations; i++) {
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__ Tbz(x3, 2, &target_4);
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}
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__ Bind(&target_4);
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masm.FinalizeCode();
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return 0;
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}
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