defines.h

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// Copyright © 2023 Apple Inc.
 
#pragma once
 
#if defined __METAL__ || defined MLX_METAL_JIT
#define MTL_CONST constant
#else
#define MTL_CONST
#endif
 
static MTL_CONST constexpr int MAX_REDUCE_SPECIALIZED_DIMS = 4;
static MTL_CONST constexpr int REDUCE_N_READS = 4;
static MTL_CONST constexpr int REDUCE_N_WRITES = 4;
static MTL_CONST constexpr int SOFTMAX_N_READS = 4;
static MTL_CONST constexpr int RMS_N_READS = 4;
static MTL_CONST constexpr int RMS_LOOPED_LIMIT = 4096;
 
// Instantiate a templated kernel.
// Extra args are used as template parameters:
// e.g. instantiate_kernel(binary_int, binary, a, b) ->
// [[host_name(binary_int)]] [kernel] binary<a, b>
#define instantiate_kernel(name, func, ...) \
  template [[host_name(                     \
      name)]] [[kernel]] decltype(func<__VA_ARGS__>) func<__VA_ARGS__>;