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// Copyright 2014, ARM Limited
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of ARM Limited nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "a64/macro-assembler-a64.h"
#include "a64/instructions-a64.h"
#include "globals-vixl.h"
using namespace vixl;
static const unsigned kDefaultInstructionCount = 100000;
// This program focuses on emitting simple instructions.
//
// This code will emit a given number of 'add x0, x1, x2' in a fixed size
// buffer, looping over the buffer if necessary. This code therefore focuses
// on Emit and Operand.
int main(int argc, char* argv[]) {
unsigned instructions = 0;
switch (argc) {
case 1:
instructions = kDefaultInstructionCount;
break;
case 2:
instructions = atoi(argv[1]);
break;
default:
printf("Usage: %s [#instructions]\n", argv[0]);
exit(1);
}
const unsigned buffer_size = 256 * KBytes;
const unsigned buffer_instruction_count = buffer_size / kInstructionSize;
MacroAssembler masm(buffer_size);
#define __ masm.
unsigned rounds = instructions / buffer_instruction_count;
for (unsigned i = 0; i < rounds; ++i) {
{
InstructionAccurateScope scope(&masm, buffer_instruction_count);
for (unsigned j = 0; j < buffer_instruction_count; ++j) {
__ add(x0, x1, Operand(x2));
}
}
masm.Reset();
}
unsigned remaining = instructions % buffer_instruction_count;
{
InstructionAccurateScope scope(&masm, remaining);
for (unsigned i = 0; i < remaining; ++i) {
__ add(x0, x1, Operand(x2));
}
}
masm.FinalizeCode();
return 0;
}
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