colramos-amd
265c0f4856
Co-authored-by: Nick Curtis <nicholas.curtis@amd.com>
Signed-off-by: colramos-amd <colramos@amd.com>
[ROCm/rocprofiler-compute commit: 54f0fa8c81]
99 wiersze
3.4 KiB
Plaintext
99 wiersze
3.4 KiB
Plaintext
/*
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##############################################################################bl
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# MIT License
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#
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# Copyright (c) 2021 - 2023 Advanced Micro Devices, Inc. All Rights Reserved.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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##############################################################################el
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An example to explore global/generic instructions.
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Written by Nicholas Curtis [AMD].
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*/
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#include "common.h"
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typedef int __attribute__((address_space(0)))* generic_ptr;
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__attribute__((noinline)) __device__ void generic_store(generic_ptr ptr, int zero) { *ptr = zero; }
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__attribute__((noinline)) __device__ int generic_load(generic_ptr ptr) { return *ptr; }
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__attribute__((noinline)) __device__ void generic_atomic(generic_ptr ptr, int zero) { atomicAdd((int*)ptr, zero); }
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__global__ void global_write(int* ptr, int zero) {
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ptr[threadIdx.x] = zero;
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}
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__global__ void generic_write(int* ptr, int zero, int filter) {
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__shared__ int lds[1024];
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int* generic = (threadIdx.x < filter) ? &ptr[threadIdx.x] : &lds[threadIdx.x];
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generic_store((generic_ptr)generic, zero);
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}
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__global__ void global_read(int* ptr, int zero) {
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int x = ptr[threadIdx.x];
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if (x != zero) {
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ptr[threadIdx.x] = x + 1;
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}
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}
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__global__ void generic_read(int* ptr, int zero, int filter) {
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__shared__ int lds[1024];
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if (static_cast<int>(filter - 1) == zero) {
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lds[threadIdx.x] = 0; // initialize to zero to avoid conditional, but hide behind _another_ conditional
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}
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int* generic;
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if (static_cast<int>(threadIdx.x) > filter - 1) {
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generic = &ptr[threadIdx.x];
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} else {
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generic = &lds[threadIdx.x];
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abort();
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}
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int x = generic_load((generic_ptr)generic);
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if (x != zero) {
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ptr[threadIdx.x] = x + 1;
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}
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}
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__global__ void global_atomic(int* ptr, int zero) {
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atomicAdd(ptr, zero);
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}
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__global__ void generic_atomic(int* ptr, int filter, int zero) {
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__shared__ int lds[1024];
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int* generic = (threadIdx.x % 2 == filter) ? &ptr[threadIdx.x] : &lds[threadIdx.x];
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generic_atomic((generic_ptr)generic, zero);
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}
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int main() {
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int* ptr;
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hipCheck(hipMalloc(&ptr, sizeof(int)));
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hipCheck(hipMemset(ptr, 0, sizeof(int)));
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global_write<<<1,1>>>(ptr, 0);
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generic_write<<<1,1>>>(ptr, 0, 0);
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global_read<<<1,1>>>(ptr, 0);
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generic_read<<<1,1>>>(ptr, 0, 0);
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global_atomic<<<1,1>>>(ptr, 0);
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generic_atomic<<<1,1>>>(ptr, 0, 0);
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hipCheck(hipDeviceSynchronize());
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hipCheck(hipFree(ptr));
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}
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