gs.hip

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/*
 Copyright (c) 2021-2022, The Neko Authors
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     from this software without specific prior written permission.
 
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#include <hip/hip_runtime.h>
#include <climits>
#include <cstdio>
#include <device/device_config.h>
#include <device/hip/check.h>
#include "gs_kernels.h"
 
#define GS_OP_ADD  1
#define GS_OP_MUL  2
#define GS_OP_MIN  3
#define GS_OP_MAX  4
 
extern "C" {
 
  void hip_gather_kernel(void *v, int *m, int *o, void *dg,
                         void *u, int *n, void *gd, int *nb,
                         void *b, void *bo, int *op,
                         hipStream_t stream) {
 
    if ((*m) == 0) return;
    
    const dim3 nthrds(1024, 1, 1);
    const dim3 nblcks(((*m)+ 1024 - 1)/ 1024, 1, 1);
 
    switch (*op) {
    case GS_OP_ADD:
      hipLaunchKernelGGL(HIP_KERNEL_NAME(gather_kernel_add<real>),
                         nblcks, nthrds, 0, stream,
                         (real *) v, *m, *o, (int *) dg,
                         (real *) u, *n, (int *) gd,
                         *nb, (int *) b, (int *) bo);
      HIP_CHECK(hipGetLastError());
      break;
    case GS_OP_MUL:
      hipLaunchKernelGGL(HIP_KERNEL_NAME(gather_kernel_mul<real>),
                         nblcks, nthrds, 0, stream,
                         (real *) v, *m, *o, (int *) dg,
                         (real *) u, *n, (int *) gd,
                         *nb, (int *) b, (int *) bo);
      HIP_CHECK(hipGetLastError());
      break;
    case GS_OP_MIN:
      hipLaunchKernelGGL(HIP_KERNEL_NAME(gather_kernel_min<real>),
                         nblcks, nthrds, 0, stream,
                         (real *) v, *m, *o, (int *) dg,
                         (real *) u, *n, (int *) gd,
                         *nb, (int *) b, (int *) bo);
      HIP_CHECK(hipGetLastError());
      break;
    case GS_OP_MAX:
      hipLaunchKernelGGL(HIP_KERNEL_NAME(gather_kernel_max<real>),
                         nblcks, nthrds, 0, stream,
                         (real *) v, *m, *o, (int *) dg,
                         (real *) u, *n, (int *) gd,
                         *nb, (int *) b, (int *) bo);
      HIP_CHECK(hipGetLastError());
      break;
    }
  }
 
  void hip_scatter_kernel(void *v, int *m, void *dg,
                          void *u, int *n, void *gd,
                          int *nb, void *b, void *bo,
                          hipStream_t stream) {
 
    if ((*m) == 0) return;
        
    const dim3 nthrds(1024, 1, 1);
    const dim3 nblcks(((*m)+1024 - 1)/ 1024, 1, 1);
 
    hipLaunchKernelGGL(HIP_KERNEL_NAME(scatter_kernel<real>),
                       nblcks, nthrds, 0, stream,
                       (real *) v, *m, (int *) dg,
                       (real *) u, *n, (int *) gd,
                       *nb, (int *) b, (int *) bo);
    HIP_CHECK(hipGetLastError());
  }
 
  void hip_gs_pack(void *u_d, void *buf_d, void *dof_d,
                   int offset, int n, hipStream_t stream) {
 
    const int nthrds = 1024;
    const int nblcks = (n + nthrds - 1) / nthrds;
 
    if (stream == NULL) {
      hipLaunchKernelGGL(HIP_KERNEL_NAME(gs_pack_kernel<real>),
                         nblcks, nthrds, 0, 0,
                         (real *) u_d, (real *) buf_d + offset,
                         (int *) dof_d + offset, n);
    }
    else {
      hipLaunchKernelGGL(HIP_KERNEL_NAME(gs_pack_kernel<real>),
                         nblcks, nthrds, 0, stream,
                         (real *) u_d, (real *) buf_d + offset,
                         (int *) dof_d + offset, n);
    }
    HIP_CHECK(hipGetLastError());
  }
 
  void hip_gs_unpack(real *u_d, int op, real *buf_d, int *dof_d,
                     int offset, int n, hipStream_t stream) {
 
    const int nthrds = 1024;
    const int nblcks = (n + nthrds - 1) / nthrds;
 
    switch (op) {
    case GS_OP_ADD:
      if (stream == NULL) {
        hipLaunchKernelGGL(HIP_KERNEL_NAME(gs_unpack_add_kernel<real>),
                           nblcks, nthrds, 0, 0,
                           u_d, buf_d + offset,
                           dof_d + offset, n);
      }
      else {
        hipLaunchKernelGGL(HIP_KERNEL_NAME(gs_unpack_add_kernel<real>),
                           nblcks, nthrds, 0, stream,
                           u_d, buf_d + offset,
                           dof_d + offset, n);
 
      }
      break;
    default:
      printf("%s: unknown gs op %d\n", __FILE__, op);
      abort();
    }
 
    HIP_CHECK(hipGetLastError());
  }
}