derek.holloway
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88 lines
1.7 KiB
C++
88 lines
1.7 KiB
C++
// Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "ck/ck.hpp"
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namespace ck {
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#if CK_EXPERIMENTAL_BLOCK_SYNC_LDS_WITHOUT_SYNC_VMEM
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#ifdef __gfx12__
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__device__ void llvm_amdgcn_s_wait_dscnt(short cnt) __asm("llvm.amdgcn.s.wait.dscnt");
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#endif
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#endif
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__device__ void block_sync_lds()
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{
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#if CK_EXPERIMENTAL_BLOCK_SYNC_LDS_WITHOUT_SYNC_VMEM
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#if defined(__gfx12__)
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llvm_amdgcn_s_wait_dscnt(0);
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__builtin_amdgcn_s_barrier_signal(-1);
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__builtin_amdgcn_s_barrier_wait(-1);
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#elif defined(__gfx11__)
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// asm volatile("\
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// s_waitcnt lgkmcnt(0) \n \
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// s_barrier \
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// " ::);
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__builtin_amdgcn_s_waitcnt(0xfc07);
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__builtin_amdgcn_s_barrier();
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#else
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// asm volatile("\
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// s_waitcnt lgkmcnt(0) \n \
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// s_barrier \
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// " ::);
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__builtin_amdgcn_s_waitcnt(0xc07f);
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__builtin_amdgcn_s_barrier();
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#endif
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#else
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__syncthreads();
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#endif
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}
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__device__ void block_sync_lds_direct_load()
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{
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#if defined(__gfx125__)
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__builtin_amdgcn_s_wait_asynccnt(0);
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__builtin_amdgcn_s_barrier_signal(-1);
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__builtin_amdgcn_s_barrier_wait(-1);
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#elif defined(__gfx12__)
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asm volatile("\
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s_wait_loadcnt 0x0 \n \
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s_wait_dscnt 0x0 \n \
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s_barrier_signal -1 \n \
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s_barrier_wait -1 \
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" ::);
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#else
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asm volatile("\
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s_waitcnt vmcnt(0) \n \
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s_waitcnt lgkmcnt(0) \n \
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s_barrier \
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" ::);
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#endif
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}
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__device__ void block_sync_lds_async_load()
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{
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#if defined(__gfx125__)
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__builtin_amdgcn_s_wait_asynccnt(0);
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__syncthreads();
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#else
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// fall back
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block_sync_lds();
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#endif
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}
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__device__ void s_nop()
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{
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#if 1
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asm volatile("\
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s_nop 0 \n \
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" ::);
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#else
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__builtin_amdgcn_sched_barrier(0);
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#endif
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}
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} // namespace ck
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