【Hackathon 5th No.6】 为 Paddle 增强put_along_axis API -part (PaddlePaddle#59674)

Author: YibinLiu666

paddle/phi/api/yaml/backward.yaml

@@ -1760,8 +1760,8 @@
   optional : boxes_num
 
 - backward_op : put_along_axis_grad
-  forward : put_along_axis (Tensor arr, Tensor indices, Tensor values, int axis, str reduce = "assign") -> Tensor(out)
-  args : (Tensor arr, Tensor indices, Tensor out_grad, int axis, str reduce)
+  forward : put_along_axis (Tensor arr, Tensor indices, Tensor values, int axis, str reduce = "assign", bool include_self = true) -> Tensor(out)
+  args : (Tensor arr, Tensor indices, Tensor values, Tensor out, Tensor out_grad, int axis, str reduce, bool include_self)
   output : Tensor(arr_grad), Tensor(values_grad)
   infer_meta :
     func : GeneralBinaryGradInferMeta

paddle/phi/api/yaml/op_compat.yaml

@@ -2432,7 +2432,7 @@
   outputs :
     out : Result
   attrs :
-    {axis : Axis, reduce : Reduce}
+    {axis : Axis, reduce : Reduce, include_self: Include_self}
 
 - op : pylayer
   backward : pylayer_grad

paddle/phi/api/yaml/ops.yaml

@@ -2032,7 +2032,7 @@
   backward : psroi_pool_grad
 
 - op : put_along_axis
-  args : (Tensor arr, Tensor indices, Tensor values, int axis, str reduce = "assign")
+  args : (Tensor arr, Tensor indices, Tensor values, int axis, str reduce = "assign", bool include_self = true)
   output : Tensor(out)
   infer_meta :
     func : UnchangedInferMeta

paddle/phi/backends/gpu/gpu_primitives.h

@@ -395,6 +395,182 @@ CUDA_ATOMIC_WRAPPER(Add, complex<double>) {
                          CudaAtomicAdd(imag, val.imag));
 }
 
+// For atomicMul.
+CUDA_ATOMIC_WRAPPER(Mul, int) {
+  int res = *address, old = res;  // NOLINT
+  do {
+    old = res;
+    res = atomicCAS(address,     // NOLINT
+                    old,         // NOLINT
+                    val * old);  // NOLINT
+  } while (old != res);
+  return res;
+}
+
+CUDA_ATOMIC_WRAPPER(Mul, unsigned int) {
+  unsigned int res = *address, old = res;  // NOLINT
+  do {
+    old = res;
+    res = atomicCAS(address,     // NOLINT
+                    old,         // NOLINT
+                    val * old);  // NOLINT
+  } while (old != res);
+  return res;
+}
+// CUDA API uses unsigned long long int, we cannot use uint64_t here.
+// It because unsigned long long int is not necessarily uint64_t
+CUDA_ATOMIC_WRAPPER(Mul, unsigned long long int) {  // NOLINT
+  unsigned long long int old = *address, assumed;   // NOLINT
+
+  do {
+    assumed = old;
+    old = atomicCAS(address, assumed, val * assumed);
+  } while (assumed != old);
+  return old;
+}
+
+CUDA_ATOMIC_WRAPPER(Mul, int64_t) {
+  // Here, we check long long int must be int64_t.
+  static_assert(sizeof(int64_t) == sizeof(long long int),  // NOLINT
+                "long long should be int64");
+  long long int res = *address, old = res;  // NOLINT
+  do {
+    old = res;
+    res = (long long int)atomicCAS(                                  // NOLINT
+        (unsigned long long int *)address,                           // NOLINT
+        (unsigned long long int)old,                                 // NOLINT
+        (unsigned long long int)val * (unsigned long long int)old);  // NOLINT
+  } while (old != res);
+  return res;
+}
+
+CUDA_ATOMIC_WRAPPER(Mul, float) {
+  int *const address_as_i = reinterpret_cast<int *>(address);
+  int old = *address_as_i, assumed;
+
+  do {
+    assumed = old;
+    old = atomicCAS(
+        address_as_i, assumed, __float_as_int(val * __int_as_float(assumed)));
+  } while (assumed != old);
+
+  return __int_as_float(old);
+}
+
+CUDA_ATOMIC_WRAPPER(Mul, double) {
+  unsigned long long int *const address_as_ull =            // NOLINT
+      reinterpret_cast<unsigned long long int *>(address);  // NOLINT
+  unsigned long long int old = *address_as_ull, assumed;    // NOLINT
+
+  do {
+    assumed = old;
+
+    old = atomicCAS(address_as_ull,
+                    assumed,
+                    __double_as_longlong(val * __longlong_as_double(assumed)));
+  } while (assumed != old);
+
+  return __longlong_as_double(old);
+}
+
+#ifdef PADDLE_CUDA_FP16
+inline static __device__ uint32_t mul_to_low_half(uint32_t val, float x) {
+  phi::dtype::float16 low_half;
+  // The float16 in lower 16bits
+  low_half.x = static_cast<uint16_t>(val & 0xFFFFu);
+  low_half = static_cast<phi::dtype::float16>(static_cast<float>(low_half) * x);
+  return (val & 0xFFFF0000u) | low_half.x;
+}
+
+inline static __device__ uint32_t mul_to_high_half(uint32_t val, float x) {
+  phi::dtype::float16 high_half;
+  // The float16 in higher 16bits
+  high_half.x = static_cast<uint16_t>(val >> 16);
+  high_half =
+      static_cast<phi::dtype::float16>(static_cast<float>(high_half) * x);
+  return (val & 0xFFFFu) | (static_cast<uint32_t>(high_half.x) << 16);
+}
+
+CUDA_ATOMIC_WRAPPER(Mul, phi::dtype::float16) {
+  if (*address >= val) {
+    return *address;
+  }
+  uint32_t *address_as_ui = reinterpret_cast<uint32_t *>(
+      reinterpret_cast<char *>(address) -
+      (reinterpret_cast<uintptr_t>(address) & 0x02));
+  float val_f = static_cast<float>(val);
+  uint32_t old = *address_as_ui;
+  uint32_t assumed;
+  if (((uintptr_t)address & 0x02) == 0) {
+    // The float16 value stay at lower 16 bits of the address.
+    do {
+      assumed = old;
+      old = atomicCAS(address_as_ui, assumed, mul_to_low_half(assumed, val_f));
+    } while (old != assumed);
+    phi::dtype::float16 ret;
+    ret.x = old & 0xFFFFu;
+    return ret;
+  } else {
+    // The float16 value stay at higher 16 bits of the address.
+    do {
+      assumed = old;
+      old = atomicCAS(address_as_ui, assumed, mul_to_high_half(assumed, val_f));
+    } while (old != assumed);
+    phi::dtype::float16 ret;
+    ret.x = old >> 16;
+    return ret;
+  }
+}
+#endif
+
+inline static __device__ uint32_t bf16_mul_to_low_half(uint32_t val, float x) {
+  phi::dtype::bfloat16 low_half;
+  // The bfloat16 in lower 16bits
+  low_half.x = static_cast<uint16_t>(val & 0xFFFFu);
+  low_half =
+      static_cast<phi::dtype::bfloat16>(static_cast<float>(low_half) * x);
+  return (val & 0xFFFF0000u) | low_half.x;
+}
+
+inline static __device__ uint32_t bf16_mul_to_high_half(uint32_t val, float x) {
+  phi::dtype::bfloat16 high_half;
+  // The bfloat16 in higher 16bits
+  high_half.x = static_cast<uint16_t>(val >> 16);
+  high_half =
+      static_cast<phi::dtype::bfloat16>(static_cast<float>(high_half) * x);
+  return (val & 0xFFFFu) | (static_cast<uint32_t>(high_half.x) << 16);
+}
+
+CUDA_ATOMIC_WRAPPER(Mul, phi::dtype::bfloat16) {
+  uint32_t *address_as_ui = reinterpret_cast<uint32_t *>(
+      reinterpret_cast<char *>(address) -
+      (reinterpret_cast<uintptr_t>(address) & 0x02));
+  float val_f = static_cast<float>(val);
+  uint32_t old = *address_as_ui;
+  uint32_t assumed;
+  if (((uintptr_t)address & 0x02) == 0) {
+    // The bfloat16 value stay at lower 16 bits of the address.
+    do {
+      assumed = old;
+      old = atomicCAS(
+          address_as_ui, assumed, bf16_mul_to_low_half(assumed, val_f));
+    } while (old != assumed);
+    phi::dtype::bfloat16 ret;
+    ret.x = old & 0xFFFFu;
+    return ret;
+  } else {
+    // The bfloat16 value stay at higher 16 bits of the address.
+    do {
+      assumed = old;
+      old = atomicCAS(
+          address_as_ui, assumed, bf16_mul_to_high_half(assumed, val_f));
+    } while (old != assumed);
+    phi::dtype::bfloat16 ret;
+    ret.x = old >> 16;
+    return ret;
+  }
+}
+
 // For atomicMax
 USE_CUDA_ATOMIC(Max, int);
 USE_CUDA_ATOMIC(Max, unsigned int);

paddle/phi/kernels/cpu/cum_maxmin_grad_kernel.cc

@@ -38,10 +38,10 @@ void CummaxGradKernel(const Context& dev_ctx,
   }
   if (dtype == DataType::INT32) {
     phi::funcs::cpu_scatter_add_kernel<T, int32_t>(
-        *x_grad, axis, indices, out_grad, dev_ctx);
+        *x_grad, axis, indices, out_grad, true, dev_ctx);
   } else if (dtype == DataType::INT64) {
     phi::funcs::cpu_scatter_add_kernel<T, int64_t>(
-        *x_grad, axis, indices, out_grad, dev_ctx);
+        *x_grad, axis, indices, out_grad, true, dev_ctx);
   }
 }
 
@@ -61,10 +61,10 @@ void CumminGradKernel(const Context& dev_ctx,
   }
   if (dtype == DataType::INT32) {
     phi::funcs::cpu_scatter_add_kernel<T, int32_t>(
-        *x_grad, axis, indices, out_grad, dev_ctx);
+        *x_grad, axis, indices, out_grad, true, dev_ctx);
   } else if (dtype == DataType::INT64) {
     phi::funcs::cpu_scatter_add_kernel<T, int64_t>(
-        *x_grad, axis, indices, out_grad, dev_ctx);
+        *x_grad, axis, indices, out_grad, true, dev_ctx);
   }
 }