/*
* Copyright (C) 2013 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.
*/
#ifndef __BANDWIDTH_H__
#define __BANDWIDTH_H__
#include <stdlib.h>
#include <string.h>
#include "utils/Compat.h"
#include "memtest.h"
// Bandwidth Class definitions.
class BandwidthBenchmark {
public:
BandwidthBenchmark()
: _size(0),
_num_warm_loops(DEFAULT_NUM_WARM_LOOPS),
_num_loops(DEFAULT_NUM_LOOPS) {}
virtual ~BandwidthBenchmark() {}
bool run() {
if (_size == 0) {
return false;
}
if (!canRun()) {
return false;
}
bench(_num_warm_loops);
nsecs_t t = system_time();
bench(_num_loops);
t = system_time() - t;
_mb_per_sec = (_size*(_num_loops/_BYTES_PER_MB))/(t/_NUM_NS_PER_SEC);
return true;
}
bool canRun() { return !usesNeon() || isNeonSupported(); }
virtual bool setSize(size_t size) = 0;
virtual const char *getName() = 0;
virtual bool verify() = 0;
virtual bool usesNeon() { return false; }
bool isNeonSupported() {
#if defined(__ARM_NEON__)
return true;
#else
return false;
#endif
}
// Accessors/mutators.
double mb_per_sec() { return _mb_per_sec; }
size_t num_warm_loops() { return _num_warm_loops; }
size_t num_loops() { return _num_loops; }
size_t size() { return _size; }
void set_num_warm_loops(size_t num_warm_loops) {
_num_warm_loops = num_warm_loops;
}
void set_num_loops(size_t num_loops) { _num_loops = num_loops; }
// Static constants
static const unsigned int DEFAULT_NUM_WARM_LOOPS = 1000000;
static const unsigned int DEFAULT_NUM_LOOPS = 20000000;
protected:
virtual void bench(size_t num_loops) = 0;
double _mb_per_sec;
size_t _size;
size_t _num_warm_loops;
size_t _num_loops;
private:
// Static constants
static const CONSTEXPR double _NUM_NS_PER_SEC = 1000000000.0;
static const CONSTEXPR double _BYTES_PER_MB = 1024.0* 1024.0;
};
class CopyBandwidthBenchmark : public BandwidthBenchmark {
public:
CopyBandwidthBenchmark() : BandwidthBenchmark(), _src(NULL), _dst(NULL) { }
bool setSize(size_t size) {
if (_src) {
free(_src);
}
if (_dst) {
free(_dst);
}
if (size == 0) {
_size = DEFAULT_COPY_SIZE;
} else {
_size = size;
}
_src = reinterpret_cast<char*>(memalign(64, _size));
if (!_src) {
perror("Failed to allocate memory for test.");
return false;
}
_dst = reinterpret_cast<char*>(memalign(64, _size));
if (!_dst) {
perror("Failed to allocate memory for test.");
return false;
}
return true;
}
virtual ~CopyBandwidthBenchmark() {
if (_src) {
free(_src);
_src = NULL;
}
if (_dst) {
free(_dst);
_dst = NULL;
}
}
bool verify() {
memset(_src, 0x23, _size);
memset(_dst, 0, _size);
bench(1);
if (memcmp(_src, _dst, _size) != 0) {
printf("Buffers failed to compare after one loop.\n");
return false;
}
memset(_src, 0x23, _size);
memset(_dst, 0, _size);
_num_loops = 2;
bench(2);
if (memcmp(_src, _dst, _size) != 0) {
printf("Buffers failed to compare after two loops.\n");
return false;
}
return true;
}
protected:
char *_src;
char *_dst;
static const unsigned int DEFAULT_COPY_SIZE = 8000;
};
class CopyLdrdStrdBenchmark : public CopyBandwidthBenchmark {
public:
CopyLdrdStrdBenchmark() : CopyBandwidthBenchmark() { }
virtual ~CopyLdrdStrdBenchmark() {}
const char *getName() { return "ldrd/strd"; }
protected:
// Copy using ldrd/strd instructions.
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4,r6,r7}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r3, %3\n"
"0:\n"
"mov r4, r2, lsr #6\n"
"1:\n"
"ldrd r6, r7, [r0]\n"
"strd r6, r7, [r1]\n"
"ldrd r6, r7, [r0, #8]\n"
"strd r6, r7, [r1, #8]\n"
"ldrd r6, r7, [r0, #16]\n"
"strd r6, r7, [r1, #16]\n"
"ldrd r6, r7, [r0, #24]\n"
"strd r6, r7, [r1, #24]\n"
"ldrd r6, r7, [r0, #32]\n"
"strd r6, r7, [r1, #32]\n"
"ldrd r6, r7, [r0, #40]\n"
"strd r6, r7, [r1, #40]\n"
"ldrd r6, r7, [r0, #48]\n"
"strd r6, r7, [r1, #48]\n"
"ldrd r6, r7, [r0, #56]\n"
"strd r6, r7, [r1, #56]\n"
"add r0, r0, #64\n"
"add r1, r1, #64\n"
"subs r4, r4, #1\n"
"bgt 1b\n"
"sub r0, r0, r2\n"
"sub r1, r1, r2\n"
"subs r3, r3, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4,r6,r7}\n"
:: "r" (_src), "r" (_dst), "r" (_size), "r" (num_loops) : "r0", "r1", "r2", "r3");
}
};
class CopyLdmiaStmiaBenchmark : public CopyBandwidthBenchmark {
public:
CopyLdmiaStmiaBenchmark() : CopyBandwidthBenchmark() { }
virtual ~CopyLdmiaStmiaBenchmark() {}
const char *getName() { return "ldmia/stmia"; }
protected:
// Copy using ldmia/stmia instructions.
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r3, %3\n"
"0:\n"
"mov r4, r2, lsr #6\n"
"1:\n"
"ldmia r0!, {r5, r6, r7, r8, r9, r10, r11, r12}\n"
"stmia r1!, {r5, r6, r7, r8, r9, r10, r11, r12}\n"
"subs r4, r4, #1\n"
"ldmia r0!, {r5, r6, r7, r8, r9, r10, r11, r12}\n"
"stmia r1!, {r5, r6, r7, r8, r9, r10, r11, r12}\n"
"bgt 1b\n"
"sub r0, r0, r2\n"
"sub r1, r1, r2\n"
"subs r3, r3, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12}\n"
:: "r" (_src), "r" (_dst), "r" (_size), "r" (num_loops) : "r0", "r1", "r2", "r3");
}
};
class CopyVld1Vst1Benchmark : public CopyBandwidthBenchmark {
public:
CopyVld1Vst1Benchmark() : CopyBandwidthBenchmark() { }
virtual ~CopyVld1Vst1Benchmark() {}
const char *getName() { return "vld1/vst1"; }
bool usesNeon() { return true; }
protected:
// Copy using vld1/vst1 instructions.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r3, %3\n"
"0:\n"
"mov r4, r2, lsr #6\n"
"1:\n"
"vld1.8 {d0-d3}, [r0]!\n"
"vld1.8 {d4-d7}, [r0]!\n"
"subs r4, r4, #1\n"
"vst1.8 {d0-d3}, [r1:128]!\n"
"vst1.8 {d4-d7}, [r1:128]!\n"
"bgt 1b\n"
"sub r0, r0, r2\n"
"sub r1, r1, r2\n"
"subs r3, r3, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4}\n"
:: "r" (_src), "r" (_dst), "r" (_size), "r" (num_loops) : "r0", "r1", "r2", "r3");
#else
void bench(size_t) {
#endif
}
};
class CopyVldrVstrBenchmark : public CopyBandwidthBenchmark {
public:
CopyVldrVstrBenchmark() : CopyBandwidthBenchmark() { }
virtual ~CopyVldrVstrBenchmark() {}
const char *getName() { return "vldr/vstr"; }
bool usesNeon() { return true; }
protected:
// Copy using vldr/vstr instructions.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r3, %3\n"
"0:\n"
"mov r4, r2, lsr #6\n"
"1:\n"
"vldr d0, [r0, #0]\n"
"subs r4, r4, #1\n"
"vldr d1, [r0, #8]\n"
"vstr d0, [r1, #0]\n"
"vldr d0, [r0, #16]\n"
"vstr d1, [r1, #8]\n"
"vldr d1, [r0, #24]\n"
"vstr d0, [r1, #16]\n"
"vldr d0, [r0, #32]\n"
"vstr d1, [r1, #24]\n"
"vldr d1, [r0, #40]\n"
"vstr d0, [r1, #32]\n"
"vldr d0, [r0, #48]\n"
"vstr d1, [r1, #40]\n"
"vldr d1, [r0, #56]\n"
"vstr d0, [r1, #48]\n"
"add r0, r0, #64\n"
"vstr d1, [r1, #56]\n"
"add r1, r1, #64\n"
"bgt 1b\n"
"sub r0, r0, r2\n"
"sub r1, r1, r2\n"
"subs r3, r3, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4}\n"
:: "r" (_src), "r" (_dst), "r" (_size), "r" (num_loops) : "r0", "r1", "r2", "r3");
#else
void bench(size_t) {
#endif
}
};
class CopyVldmiaVstmiaBenchmark : public CopyBandwidthBenchmark {
public:
CopyVldmiaVstmiaBenchmark() : CopyBandwidthBenchmark() { }
virtual ~CopyVldmiaVstmiaBenchmark() {}
const char *getName() { return "vldmia/vstmia"; }
bool usesNeon() { return true; }
protected:
// Copy using vldmia/vstmia instructions.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r3, %3\n"
"0:\n"
"mov r4, r2, lsr #6\n"
"1:\n"
"vldmia r0!, {d0-d7}\n"
"subs r4, r4, #1\n"
"vstmia r1!, {d0-d7}\n"
"bgt 1b\n"
"sub r0, r0, r2\n"
"sub r1, r1, r2\n"
"subs r3, r3, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4}\n"
:: "r" (_src), "r" (_dst), "r" (_size), "r" (num_loops) : "r0", "r1", "r2", "r3");
#else
void bench(size_t) {
#endif
}
};
class MemcpyBenchmark : public CopyBandwidthBenchmark {
public:
MemcpyBenchmark() : CopyBandwidthBenchmark() { }
virtual ~MemcpyBenchmark() {}
const char *getName() { return "memcpy"; }
protected:
void bench(size_t num_loops) {
for (size_t i = 0; i < num_loops; i++) {
memcpy(_dst, _src, _size);
}
}
};
class SingleBufferBandwidthBenchmark : public BandwidthBenchmark {
public:
SingleBufferBandwidthBenchmark() : BandwidthBenchmark(), _buffer(NULL) { }
virtual ~SingleBufferBandwidthBenchmark() {
if (_buffer) {
free(_buffer);
_buffer = NULL;
}
}
bool setSize(size_t size) {
if (_buffer) {
free(_buffer);
_buffer = NULL;
}
if (size == 0) {
_size = DEFAULT_SINGLE_BUFFER_SIZE;
} else {
_size = size;
}
_buffer = reinterpret_cast<char*>(memalign(64, _size));
if (!_buffer) {
perror("Failed to allocate memory for test.");
return false;
}
memset(_buffer, 0, _size);
return true;
}
bool verify() { return true; }
protected:
char *_buffer;
static const unsigned int DEFAULT_SINGLE_BUFFER_SIZE = 16000;
};
class WriteBandwidthBenchmark : public SingleBufferBandwidthBenchmark {
public:
WriteBandwidthBenchmark() : SingleBufferBandwidthBenchmark() { }
virtual ~WriteBandwidthBenchmark() { }
bool verify() {
memset(_buffer, 0, _size);
bench(1);
for (size_t i = 0; i < _size; i++) {
if (_buffer[i] != 1) {
printf("Buffer failed to compare after one loop.\n");
return false;
}
}
memset(_buffer, 0, _size);
bench(2);
for (size_t i = 0; i < _size; i++) {
if (_buffer[i] != 2) {
printf("Buffer failed to compare after two loops.\n");
return false;
}
}
return true;
}
};
class WriteStrdBenchmark : public WriteBandwidthBenchmark {
public:
WriteStrdBenchmark() : WriteBandwidthBenchmark() { }
virtual ~WriteStrdBenchmark() {}
const char *getName() { return "strd"; }
protected:
// Write a given value using strd.
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4,r5}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r4, #0\n"
"mov r5, #0\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"add r4, r4, #0x01010101\n"
"mov r5, r4\n"
"1:\n"
"subs r3, r3, #1\n"
"strd r4, r5, [r0]\n"
"strd r4, r5, [r0, #8]\n"
"strd r4, r5, [r0, #16]\n"
"strd r4, r5, [r0, #24]\n"
"add r0, r0, #32\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4,r5}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
}
};
class WriteStmiaBenchmark : public WriteBandwidthBenchmark {
public:
WriteStmiaBenchmark() : WriteBandwidthBenchmark() { }
virtual ~WriteStmiaBenchmark() {}
const char *getName() { return "stmia"; }
protected:
// Write a given value using stmia.
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r4, #0\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"add r4, r4, #0x01010101\n"
"mov r5, r4\n"
"mov r6, r4\n"
"mov r7, r4\n"
"mov r8, r4\n"
"mov r9, r4\n"
"mov r10, r4\n"
"mov r11, r4\n"
"1:\n"
"subs r3, r3, #1\n"
"stmia r0!, {r4, r5, r6, r7, r8, r9, r10, r11}\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
}
};
class WriteVst1Benchmark : public WriteBandwidthBenchmark {
public:
WriteVst1Benchmark() : WriteBandwidthBenchmark() { }
virtual ~WriteVst1Benchmark() {}
const char *getName() { return "vst1"; }
bool usesNeon() { return true; }
protected:
// Write a given value using vst.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r4, #0\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"add r4, r4, #1\n"
"vdup.8 d0, r4\n"
"vmov d1, d0\n"
"vmov d2, d0\n"
"vmov d3, d0\n"
"1:\n"
"subs r3, r3, #1\n"
"vst1.8 {d0-d3}, [r0:128]!\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
#else
void bench(size_t) {
#endif
}
};
class WriteVstrBenchmark : public WriteBandwidthBenchmark {
public:
WriteVstrBenchmark() : WriteBandwidthBenchmark() { }
virtual ~WriteVstrBenchmark() {}
const char *getName() { return "vstr"; }
bool usesNeon() { return true; }
protected:
// Write a given value using vst.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r4, #0\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"add r4, r4, #1\n"
"vdup.8 d0, r4\n"
"vmov d1, d0\n"
"vmov d2, d0\n"
"vmov d3, d0\n"
"1:\n"
"vstr d0, [r0, #0]\n"
"subs r3, r3, #1\n"
"vstr d1, [r0, #8]\n"
"vstr d0, [r0, #16]\n"
"vstr d1, [r0, #24]\n"
"add r0, r0, #32\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
#else
void bench(size_t) {
#endif
}
};
class WriteVstmiaBenchmark : public WriteBandwidthBenchmark {
public:
WriteVstmiaBenchmark() : WriteBandwidthBenchmark() { }
virtual ~WriteVstmiaBenchmark() {}
const char *getName() { return "vstmia"; }
bool usesNeon() { return true; }
protected:
// Write a given value using vstmia.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r4, #0\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"add r4, r4, #1\n"
"vdup.8 d0, r4\n"
"vmov d1, d0\n"
"vmov d2, d0\n"
"vmov d3, d0\n"
"1:\n"
"subs r3, r3, #1\n"
"vstmia r0!, {d0-d3}\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
#else
void bench(size_t) {
#endif
}
};
class MemsetBenchmark : public WriteBandwidthBenchmark {
public:
MemsetBenchmark() : WriteBandwidthBenchmark() { }
virtual ~MemsetBenchmark() {}
const char *getName() { return "memset"; }
protected:
void bench(size_t num_loops) {
for (size_t i = 0; i < num_loops; i++) {
memset(_buffer, (i % 255) + 1, _size);
}
}
};
class ReadLdrdBenchmark : public SingleBufferBandwidthBenchmark {
public:
ReadLdrdBenchmark() : SingleBufferBandwidthBenchmark() { }
virtual ~ReadLdrdBenchmark() {}
const char *getName() { return "ldrd"; }
protected:
// Write a given value using strd.
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4,r5}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"1:\n"
"subs r3, r3, #1\n"
"ldrd r4, r5, [r0]\n"
"ldrd r4, r5, [r0, #8]\n"
"ldrd r4, r5, [r0, #16]\n"
"ldrd r4, r5, [r0, #24]\n"
"add r0, r0, #32\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4,r5}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
}
};
class ReadLdmiaBenchmark : public SingleBufferBandwidthBenchmark {
public:
ReadLdmiaBenchmark() : SingleBufferBandwidthBenchmark() { }
virtual ~ReadLdmiaBenchmark() {}
const char *getName() { return "ldmia"; }
protected:
// Write a given value using stmia.
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"1:\n"
"subs r3, r3, #1\n"
"ldmia r0!, {r4, r5, r6, r7, r8, r9, r10, r11}\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
}
};
class ReadVld1Benchmark : public SingleBufferBandwidthBenchmark {
public:
ReadVld1Benchmark() : SingleBufferBandwidthBenchmark() { }
virtual ~ReadVld1Benchmark() {}
const char *getName() { return "vld1"; }
bool usesNeon() { return true; }
protected:
// Write a given value using vst.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"1:\n"
"subs r3, r3, #1\n"
"vld1.8 {d0-d3}, [r0:128]!\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
#else
void bench(size_t) {
#endif
}
};
class ReadVldrBenchmark : public SingleBufferBandwidthBenchmark {
public:
ReadVldrBenchmark() : SingleBufferBandwidthBenchmark() { }
virtual ~ReadVldrBenchmark() {}
const char *getName() { return "vldr"; }
bool usesNeon() { return true; }
protected:
// Write a given value using vst.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"1:\n"
"vldr d0, [r0, #0]\n"
"subs r3, r3, #1\n"
"vldr d1, [r0, #8]\n"
"vldr d0, [r0, #16]\n"
"vldr d1, [r0, #24]\n"
"add r0, r0, #32\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
#else
void bench(size_t) {
#endif
}
};
class ReadVldmiaBenchmark : public SingleBufferBandwidthBenchmark {
public:
ReadVldmiaBenchmark() : SingleBufferBandwidthBenchmark() { }
virtual ~ReadVldmiaBenchmark() {}
const char *getName() { return "vldmia"; }
bool usesNeon() { return true; }
protected:
// Write a given value using vstmia.
#if defined(__ARM_NEON__)
void bench(size_t num_loops) {
asm volatile(
"stmfd sp!, {r0,r1,r2,r3}\n"
"mov r0, %0\n"
"mov r1, %1\n"
"mov r2, %2\n"
"0:\n"
"mov r3, r1, lsr #5\n"
"1:\n"
"subs r3, r3, #1\n"
"vldmia r0!, {d0-d3}\n"
"bgt 1b\n"
"sub r0, r0, r1\n"
"subs r2, r2, #1\n"
"bgt 0b\n"
"ldmfd sp!, {r0,r1,r2,r3}\n"
:: "r" (_buffer), "r" (_size), "r" (num_loops) : "r0", "r1", "r2");
#else
void bench(size_t) {
#endif
}
};
#endif // __BANDWIDTH_H__