Move Triton to common (#2359)

* move triton to common and change paths
Signed-off-by: tdophung <tdophung@nvidia.com>

* Formatting
Signed-off-by: tdophung <tdophung@nvidia.com>

---------
Signed-off-by: tdophung <tdophung@nvidia.com>

transformer_engine/common/triton/__init__.py

+# Copyright (c) 2022-2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# See LICENSE for license information.
+
+"""Kernels written with OpenAI Triton."""

transformer_engine/common/triton/cross_entropy.py

+# Copyright (c) 2022-2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# See LICENSE for license information.
+
+"""Efficient Cross Entropy kernels written with OpenAI Triton."""
+
+import triton
+import triton.language as tl
+
+
+@triton.jit
+def online_softmax_kernel(
+    X_ptr,
+    X_stride,
+    Y_ptr,
+    Y_stride,
+    m_d_X_y_ptr,
+    m_d_X_y_stride,
+    rank,
+    n_cols,
+    BLOCK_SIZE: tl.constexpr,
+):
+    """
+    This kernel computes the m/d components on this TP rank for the online softmax.
+
+    Parameters:
+    X_ptr: Pointer to input tensor.
+    X_stride (int): The stride of the input tensor.
+    Y_ptr: Pointer to target tensor.
+    Y_stride (int): The stride of the target tensor.
+    m_d_X_y_ptr: Pointer to m/d/X_y tensor.
+    m_d_X_y_stride (int): The stride of the m/d/X_y tensor.
+    rank (int): The rank of this device in the TP group.
+    n_cols (int): The number of columns in the input tensor.
+    BLOCK_SIZE (int): The block size for Triton operations.
+    """
+
+    program_id = tl.program_id(0).to(tl.int64)
+
+    # locate the start index
+    X_ptr += program_id * X_stride
+
+    # Load Y_ptr
+    Y_ptr += program_id * Y_stride
+    y = tl.load(Y_ptr)
+
+    vocab_start_idx = rank * n_cols
+    vocab_end_idx = (rank + 1) * n_cols
+    if y >= vocab_start_idx:
+        if y < vocab_end_idx:
+            X_y = tl.load(X_ptr + y - vocab_start_idx).to(tl.float32)
+        else:
+            X_y = float("-inf")
+    else:
+        X_y = float("-inf")
+
+    m_d_X_y_ptr += program_id * m_d_X_y_stride * 3
+
+    # 3. [Online softmax] first pass: find max + sum
+    m = float("-inf")  # m is the max value. use the notation from the paper
+    d = 0.0  # d is the sum. use the notation from the paper
+
+    for i in range(0, n_cols, BLOCK_SIZE):
+        X_offsets = i + tl.arange(0, BLOCK_SIZE)
+        X_block = tl.load(X_ptr + X_offsets, mask=X_offsets < n_cols, other=float("-inf")).to(
+            tl.float32
+        )
+        block_max = tl.max(X_block)
+        m_new = tl.maximum(m, block_max)
+        d = d * tl.exp(m - m_new) + tl.sum(tl.exp(X_block - m_new))
+        m = m_new
+
+    tl.store(m_d_X_y_ptr, m)
+    tl.store(m_d_X_y_ptr + m_d_X_y_stride, d)
+    tl.store(m_d_X_y_ptr + (2 * m_d_X_y_stride), X_y)
+
+
+@triton.jit
+def cross_entropy_kernel(
+    X_ptr,
+    X_stride,
+    Y_ptr,
+    Y_stride,
+    loss_ptr,
+    loss_stride,
+    m_d_X_y_ptr,
+    m_d_X_y_stride,
+    rank,
+    world_size,
+    ignore_idx,
+    n_cols,
+    n_non_ignore,
+    reduce_loss: tl.constexpr,
+    label_smoothing: tl.constexpr,
+    BLOCK_SIZE: tl.constexpr,
+):
+    """
+    This kernel computes both cross entropy loss and the gradient of the input.
+
+    Parameters:
+    X_ptr: Pointer to input tensor.
+    X_stride (int): The stride of the input tensor.
+    Y_ptr: Pointer to target tensor.
+    Y_stride (int): The stride of the target tensor.
+    loss_ptr: Pointer to tensor to store the loss.
+    loss_stride (int): The stride of the loss tensor.
+    m_d_X_y_ptr: Pointer to m/d/X_y tensor.
+    m_d_X_y_stride: The stride of m/d/X_y tensor.
+    rank (int): The rank of this device in the TP group.
+    world_size (int): The size of world involved in this distributed loss calculation.
+    ignore_idx (int): Tokens to be ignored for loss and gradient calculation.
+    n_cols (int): The number of columns in the input tensor.
+    n_non_ignore (int): The number of non-ignored elements in the batch.
+    label_smoothing (float): The amount of smoothing when computing the loss, where 0.0 means no smoothing.
+    BLOCK_SIZE (int): The block size for Triton operations.
+    """
+
+    program_id = tl.program_id(0).to(tl.int64)
+
+    # locate the start index
+    X_ptr += program_id * X_stride
+
+    # Load Y_ptr
+    Y_ptr += program_id * Y_stride
+    y = tl.load(Y_ptr)
+
+    if y == ignore_idx:
+        # set all X_ptr as 0
+        for i in range(0, n_cols, BLOCK_SIZE):
+            X_offsets = i + tl.arange(0, BLOCK_SIZE)
+            tl.store(X_ptr + X_offsets, 0.0, mask=X_offsets < n_cols)
+        return
+
+    loss_ptr += program_id * loss_stride
+    m_d_X_y_ptr += program_id * 3 * m_d_X_y_stride
+
+    # Need to reduce the m/d/X_y values from other TP ranks
+    m = tl.load(m_d_X_y_ptr)
+    d = tl.load(m_d_X_y_ptr + m_d_X_y_stride)
+    ori_X_y = tl.load(m_d_X_y_ptr + (2 * m_d_X_y_stride))
+
+    for i in range(1, world_size):
+        offset = i * 3 * n_non_ignore * m_d_X_y_stride
+        access_ptr = m_d_X_y_ptr + offset
+        m_new = tl.load(access_ptr)
+        d_new = tl.load(access_ptr + m_d_X_y_stride)
+        X_y_new = tl.load(access_ptr + (2 * m_d_X_y_stride))
+
+        d = d * tl.exp(m - tl.maximum(m, m_new)) + d_new * tl.exp(m_new - tl.maximum(m, m_new))
+        m = tl.maximum(m, m_new)
+        ori_X_y = tl.maximum(ori_X_y, X_y_new)
+
+    # Label smoothing is a general case of normal cross entropy
+    scaled_x_sum = 0.0
+    eps = label_smoothing / (n_cols * world_size)
+
+    # 4. [Online softmax] second pass: calculate the gradients
+    # dx_y = (softmax(x_y) - 1) / N
+    # dx_i = softmax(x_i) / N, i != y
+    # N is the number of non ignored elements in the batch
+    # For label smoothing:
+    # dx_i = (softmax(x_y) - label_smoothing / V) / N, V = n_cols, i != y
+    # dx_y = (softmax(x_y) - label_smoothing / V - (1 - label_smoothing)) / N
+    #      = dx_i - (1 - label_smoothing) / N
+    for i in range(0, n_cols, BLOCK_SIZE):
+        X_offsets = i + tl.arange(0, BLOCK_SIZE)
+        X_block = tl.load(X_ptr + X_offsets, mask=X_offsets < n_cols, other=float("-inf"))
+        grad_dtype = X_block.dtype
+        X_block = X_block.to(tl.float32)
+        if label_smoothing > 0:
+            # scale X beforehand to avoid overflow
+            scaled_x_sum += tl.sum(tl.where(X_offsets < n_cols, -eps * X_block, 0.0))
+        # Scale gradients based on reduction mode
+        # For reduce_loss=True: PyTorch will scale by 1/n_rows, so we need to scale by n_rows/n_non_ignore
+        # For reduce_loss=False: No additional scaling from PyTorch, so we don't scale here
+        if reduce_loss:
+            X_block = (tl.exp(X_block - m) / d - eps) / (n_non_ignore)
+        else:
+            X_block = tl.exp(X_block - m) / d - eps
+        tl.store(X_ptr + X_offsets, X_block.to(grad_dtype), mask=X_offsets < n_cols)
+
+    # We need tl.debug_barrier() to ensure the new result of X_ptr is written
+    tl.debug_barrier()
+
+    # 5. Calculate the loss
+
+    # loss = log (softmax(X_y)) = log ((e ^ (X_y - max(X)) / sum(e ^ (X - max(X))))
+    #      = (X_y - max(X)) - log(sum(e ^ (X - max(X))))
+    loss = -(ori_X_y - m - tl.log(d))
+
+    # Orginal loss = H(q, p),  with label smoothing regularization = H(q', p) and (label_smoothing / V) = eps
+    # H(q', p) = (1 - label_smoothing) * H(q, p) + label_smoothing * H(u, p)
+    #          = (1 - label_smoothing) * H(q, p) + eps * sum(logsoftmax(x_i))
+    # By using m (global max of xi) and d (sum of e^(xi-m)), we can simplify as:
+    #          = (1 - label_smoothing) * H(q, p) + (-sum(x_i * eps) + label_smoothing * (m + logd))
+    # Refer to H(q', p) in section 7 of the paper: https://arxiv.org/pdf/1512.00567
+    if label_smoothing > 0:
+        smooth_loss = scaled_x_sum + label_smoothing * (m + tl.log(d))
+        loss = loss * (1 - label_smoothing) + smooth_loss
+
+    # 6. Specially handle the i==y case where `dx_y = (softmax(x_y) - (1 - label_smoothing) / N`
+    vocab_start_idx = rank * n_cols
+    vocab_end_idx = (rank + 1) * n_cols
+    if y >= vocab_start_idx:
+        if y < vocab_end_idx:
+            X_y = tl.load(X_ptr + y - vocab_start_idx)
+            # Apply the same conditional scaling logic for the target token
+            if reduce_loss:
+                X_y += -(1 - label_smoothing) / (n_non_ignore)
+            else:
+                X_y += -(1 - label_smoothing)
+            tl.store(X_ptr + y - vocab_start_idx, X_y)
+
+    tl.store(loss_ptr, loss)
+
+
+@triton.jit
+def element_mul_kernel(
+    X_ptr,
+    X_stride,
+    grad_output_ptr,
+    grad_output_stride,
+    n_cols,
+    BLOCK_SIZE: tl.constexpr,
+):
+    """
+    This function multiplies each element of the tensor pointed by X_ptr with the value pointed by grad_output_ptr.
+    The multiplication is performed in-place on the tensor pointed by X_ptr.
+
+    Parameters:
+    X_ptr: Pointer to the input tensor.
+    X_stride (int): The stride of the input tensor.
+    grad_output_ptr: Pointer to the gradient output value.
+    n_cols (int): The number of columns in the input tensor.
+    BLOCK_SIZE (int): The block size for Triton operations.
+    """
+
+    # Get the program ID and convert it to int64 to avoid overflow
+    program_id = tl.program_id(0).to(tl.int64)
+
+    # Locate the start index
+    X_ptr += program_id * X_stride
+
+    # Load the gradient output value
+    grad_output_ptr += program_id * grad_output_stride
+    grad_output = tl.load(grad_output_ptr)
+
+    # Perform the element-wise multiplication
+    for i in range(0, n_cols, BLOCK_SIZE):
+        X_offsets = i + tl.arange(0, BLOCK_SIZE)
+        X_block = tl.load(X_ptr + X_offsets, mask=X_offsets < n_cols)
+        tl.store(X_ptr + X_offsets, X_block * grad_output, mask=X_offsets < n_cols)

transformer_engine/common/triton/pad.py

+# Copyright (c) 2022-2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# See LICENSE for license information.
+
+"""Efficient NVFP4 padding kernels written with OpenAI Triton .
+
+TODO(ksivamani): Documentation
+
+"""
+
+import triton
+import triton.language as tl
+
+
+@triton.autotune(
+    configs=[
+        triton.Config({"BLOCK_M": 128, "BLOCK_N": 128}, num_warps=4, num_stages=2),
+        triton.Config({"BLOCK_M": 128, "BLOCK_N": 256}, num_warps=4, num_stages=2),
+        triton.Config({"BLOCK_M": 256, "BLOCK_N": 128}, num_warps=8, num_stages=2),
+        triton.Config({"BLOCK_M": 128, "BLOCK_N": 256}, num_warps=8, num_stages=1),
+    ],
+    key=["out_dim0", "out_dim1"],
+)
+@triton.jit
+def zero_pad_kernel(
+    inp_ptr,
+    out_ptr,
+    in_dim0: tl.constexpr,
+    in_dim1: tl.constexpr,
+    out_dim0: tl.constexpr,
+    out_dim1: tl.constexpr,
+    in_s0,
+    in_s1,
+    out_s0,
+    out_s1,
+    BLOCK_M: tl.constexpr,
+    BLOCK_N: tl.constexpr,
+):
+    """Pads a tensor assuming it's a columnwise scaling inverse."""
+
+    # tile over OUTPUT coordinates
+    pid_m = tl.program_id(0)
+    pid_n = tl.program_id(1)
+    offs_m = pid_m * BLOCK_M + tl.arange(0, BLOCK_M)  # output rows
+    offs_n = pid_n * BLOCK_N + tl.arange(0, BLOCK_N)  # output cols
+    om = offs_m[:, None]
+    on = offs_n[None, :]
+
+    # edge masking for output
+    out_mask = (om < out_dim0) & (on < out_dim1)
+
+    # valid input region is simply top-left (no offsets)
+    in_mask = (om < in_dim0) & (on < in_dim1)
+
+    # load valid input, else zero (masked load touches memory only where True)
+    x = tl.load(inp_ptr + om * in_s0 + on * in_s1, mask=in_mask, other=0)
+
+    # store to output (only within bounds of the output tile)
+    tl.store(out_ptr + om * out_s0 + on * out_s1, x, mask=out_mask)

transformer_engine/pytorch/distributed.py

@@ -29,12 +29,14 @@ except ImportError:
 
 import transformer_engine_torch as tex
 
+from transformer_engine.pytorch.triton.pad import pad_columnwise_scale_inv
 from . import torch_version
 from .utils import (
     is_non_tn_fp8_gemm_supported,
     safely_set_viewless_tensor_data,
     needs_quantized_gemm,
 )
+
 from .constants import dist_group_type
 from .quantization import FP8GlobalStateManager, autocast
 from .tensor.float8_tensor import Float8Quantizer, Float8Tensor, Float8CurrentScalingQuantizer
@@ -46,7 +48,6 @@ from .tensor.storage.float8_tensor_storage import Float8TensorStorage
 from .tensor.storage.mxfp8_tensor_storage import MXFP8TensorStorage
 from .tensor.storage.nvfp4_tensor_storage import NVFP4TensorStorage
 from .tensor.storage.float8_blockwise_tensor_storage import Float8BlockwiseQTensorStorage
-from .triton.pad import pad_columnwise_scale_inv
 from ..debug.pytorch.debug_quantization import DebugQuantizedTensor, DebugQuantizer
 
 

transformer_engine/pytorch/triton/__init__.py

@@ -2,4 +2,4 @@
 #
 # See LICENSE for license information.
 
-"""Kernels written with OpenAI Triton."""
+"""PyTorch wrappers for Triton kernels."""

transformer_engine/pytorch/triton/cross_entropy.py

@@ -2,7 +2,7 @@
 #
 # See LICENSE for license information.
 
-"""Efficient Cross Entropy kernels written with OpenAI Triton."""
+"""PyTorch wrapper functions for Cross Entropy Triton kernels."""
 
 from typing import Union
 from functools import reduce
@@ -12,257 +12,17 @@ import torch
 import torch.distributed as dist
 
 import triton
-import triton.language as tl
-
-
-@triton.jit
-def online_softmax_kernel(
-    X_ptr,
-    X_stride,
-    Y_ptr,
-    Y_stride,
-    m_d_X_y_ptr,
-    m_d_X_y_stride,
-    rank,
-    n_cols,
-    BLOCK_SIZE: tl.constexpr,
-):
-    """
-    This kernel computes the m/d components on this TP rank for the online softmax.
-
-    Parameters:
-    X_ptr: Pointer to input tensor.
-    X_stride (int): The stride of the input tensor.
-    Y_ptr: Pointer to target tensor.
-    Y_stride (int): The stride of the target tensor.
-    m_d_X_y_ptr: Pointer to m/d/X_y tensor.
-    m_d_X_y_stride (int): The stride of the m/d/X_y tensor.
-    rank (int): The rank of this device in the TP group.
-    n_cols (int): The number of columns in the input tensor.
-    BLOCK_SIZE (int): The block size for Triton operations.
-    """
-
-    program_id = tl.program_id(0).to(tl.int64)
-
-    # locate the start index
-    X_ptr += program_id * X_stride
-
-    # Load Y_ptr
-    Y_ptr += program_id * Y_stride
-    y = tl.load(Y_ptr)
-
-    vocab_start_idx = rank * n_cols
-    vocab_end_idx = (rank + 1) * n_cols
-    if y >= vocab_start_idx:
-        if y < vocab_end_idx:
-            X_y = tl.load(X_ptr + y - vocab_start_idx).to(tl.float32)
-        else:
-            X_y = float("-inf")
-    else:
-        X_y = float("-inf")
-
-    m_d_X_y_ptr += program_id * m_d_X_y_stride * 3
-
-    # 3. [Online softmax] first pass: find max + sum
-    m = float("-inf")  # m is the max value. use the notation from the paper
-    d = 0.0  # d is the sum. use the notation from the paper
-
-    for i in range(0, n_cols, BLOCK_SIZE):
-        X_offsets = i + tl.arange(0, BLOCK_SIZE)
-        X_block = tl.load(X_ptr + X_offsets, mask=X_offsets < n_cols, other=float("-inf")).to(
-            tl.float32
-        )
-        block_max = tl.max(X_block)
-        m_new = tl.maximum(m, block_max)
-        d = d * tl.exp(m - m_new) + tl.sum(tl.exp(X_block - m_new))
-        m = m_new
-
-    tl.store(m_d_X_y_ptr, m)
-    tl.store(m_d_X_y_ptr + m_d_X_y_stride, d)
-    tl.store(m_d_X_y_ptr + (2 * m_d_X_y_stride), X_y)
-
-
-@triton.jit
-def cross_entropy_kernel(
-    X_ptr,
-    X_stride,
-    Y_ptr,
-    Y_stride,
-    loss_ptr,
-    loss_stride,
-    m_d_X_y_ptr,
-    m_d_X_y_stride,
-    rank,
-    world_size,
-    ignore_idx,
-    n_cols,
-    n_non_ignore,
-    reduce_loss: tl.constexpr,
-    label_smoothing: tl.constexpr,
-    BLOCK_SIZE: tl.constexpr,
-):
-    """
-    This kernel computes both cross entropy loss and the gradient of the input.
-
-    Parameters:
-    X_ptr: Pointer to input tensor.
-    X_stride (int): The stride of the input tensor.
-    Y_ptr: Pointer to target tensor.
-    Y_stride (int): The stride of the target tensor.
-    loss_ptr: Pointer to tensor to store the loss.
-    loss_stride (int): The stride of the loss tensor.
-    m_d_X_y_ptr: Pointer to m/d/X_y tensor.
-    m_d_X_y_stride: The stride of m/d/X_y tensor.
-    rank (int): The rank of this device in the TP group.
-    world_size (int): The size of world involved in this distributed loss calculation.
-    ignore_idx (int): Tokens to be ignored for loss and gradient calculation.
-    n_cols (int): The number of columns in the input tensor.
-    n_non_ignore (int): The number of non-ignored elements in the batch.
-    label_smoothing (float): The amount of smoothing when computing the loss, where 0.0 means no smoothing.
-    BLOCK_SIZE (int): The block size for Triton operations.
-    """
-
-    program_id = tl.program_id(0).to(tl.int64)
-
-    # locate the start index
-    X_ptr += program_id * X_stride
-
-    # Load Y_ptr
-    Y_ptr += program_id * Y_stride
-    y = tl.load(Y_ptr)
-
-    if y == ignore_idx:
-        # set all X_ptr as 0
-        for i in range(0, n_cols, BLOCK_SIZE):
-            X_offsets = i + tl.arange(0, BLOCK_SIZE)
-            tl.store(X_ptr + X_offsets, 0.0, mask=X_offsets < n_cols)
-        return
-
-    loss_ptr += program_id * loss_stride
-    m_d_X_y_ptr += program_id * 3 * m_d_X_y_stride
-
-    # Need to reduce the m/d/X_y values from other TP ranks
-    m = tl.load(m_d_X_y_ptr)
-    d = tl.load(m_d_X_y_ptr + m_d_X_y_stride)
-    ori_X_y = tl.load(m_d_X_y_ptr + (2 * m_d_X_y_stride))
-
-    for i in range(1, world_size):
-        offset = i * 3 * n_non_ignore * m_d_X_y_stride
-        access_ptr = m_d_X_y_ptr + offset
-        m_new = tl.load(access_ptr)
-        d_new = tl.load(access_ptr + m_d_X_y_stride)
-        X_y_new = tl.load(access_ptr + (2 * m_d_X_y_stride))
-
-        d = d * tl.exp(m - tl.maximum(m, m_new)) + d_new * tl.exp(m_new - tl.maximum(m, m_new))
-        m = tl.maximum(m, m_new)
-        ori_X_y = tl.maximum(ori_X_y, X_y_new)
-
-    # Label smoothing is a general case of normal cross entropy
-    scaled_x_sum = 0.0
-    eps = label_smoothing / (n_cols * world_size)
-
-    # 4. [Online softmax] second pass: calculate the gradients
-    # dx_y = (softmax(x_y) - 1) / N
-    # dx_i = softmax(x_i) / N, i != y
-    # N is the number of non ignored elements in the batch
-    # For label smoothing:
-    # dx_i = (softmax(x_y) - label_smoothing / V) / N, V = n_cols, i != y
-    # dx_y = (softmax(x_y) - label_smoothing / V - (1 - label_smoothing)) / N
-    #      = dx_i - (1 - label_smoothing) / N
-    for i in range(0, n_cols, BLOCK_SIZE):
-        X_offsets = i + tl.arange(0, BLOCK_SIZE)
-        X_block = tl.load(X_ptr + X_offsets, mask=X_offsets < n_cols, other=float("-inf"))
-        grad_dtype = X_block.dtype
-        X_block = X_block.to(tl.float32)
-        if label_smoothing > 0:
-            # scale X beforehand to avoid overflow
-            scaled_x_sum += tl.sum(tl.where(X_offsets < n_cols, -eps * X_block, 0.0))
-        # Scale gradients based on reduction mode
-        # For reduce_loss=True: PyTorch will scale by 1/n_rows, so we need to scale by n_rows/n_non_ignore
-        # For reduce_loss=False: No additional scaling from PyTorch, so we don't scale here
-        if reduce_loss:
-            X_block = (tl.exp(X_block - m) / d - eps) / (n_non_ignore)
-        else:
-            X_block = tl.exp(X_block - m) / d - eps
-        tl.store(X_ptr + X_offsets, X_block.to(grad_dtype), mask=X_offsets < n_cols)
-
-    # We need tl.debug_barrier() to ensure the new result of X_ptr is written
-    tl.debug_barrier()
-
-    # 5. Calculate the loss
-
-    # loss = log (softmax(X_y)) = log ((e ^ (X_y - max(X)) / sum(e ^ (X - max(X))))
-    #      = (X_y - max(X)) - log(sum(e ^ (X - max(X))))
-    loss = -(ori_X_y - m - tl.log(d))
-
-    # Orginal loss = H(q, p),  with label smoothing regularization = H(q', p) and (label_smoothing / V) = eps
-    # H(q', p) = (1 - label_smoothing) * H(q, p) + label_smoothing * H(u, p)
-    #          = (1 - label_smoothing) * H(q, p) + eps * sum(logsoftmax(x_i))
-    # By using m (global max of xi) and d (sum of e^(xi-m)), we can simplify as:
-    #          = (1 - label_smoothing) * H(q, p) + (-sum(x_i * eps) + label_smoothing * (m + logd))
-    # Refer to H(q', p) in section 7 of the paper: https://arxiv.org/pdf/1512.00567
-    if label_smoothing > 0:
-        smooth_loss = scaled_x_sum + label_smoothing * (m + tl.log(d))
-        loss = loss * (1 - label_smoothing) + smooth_loss
-
-    # 6. Specially handle the i==y case where `dx_y = (softmax(x_y) - (1 - label_smoothing) / N`
-    vocab_start_idx = rank * n_cols
-    vocab_end_idx = (rank + 1) * n_cols
-    if y >= vocab_start_idx:
-        if y < vocab_end_idx:
-            X_y = tl.load(X_ptr + y - vocab_start_idx)
-            # Apply the same conditional scaling logic for the target token
-            if reduce_loss:
-                X_y += -(1 - label_smoothing) / (n_non_ignore)
-            else:
-                X_y += -(1 - label_smoothing)
-            tl.store(X_ptr + y - vocab_start_idx, X_y)
-
-    tl.store(loss_ptr, loss)
 
+from transformer_engine.common.triton.cross_entropy import (
+    online_softmax_kernel,
+    cross_entropy_kernel,
+    element_mul_kernel,
+)
 
 # The optimal maximum block size depends on your hardware, your kernel, and your dtype
 MAX_FUSED_SIZE = 65536 // 2
 
 
-@triton.jit
-def element_mul_kernel(
-    X_ptr,
-    X_stride,
-    grad_output_ptr,
-    grad_output_stride,
-    n_cols,
-    BLOCK_SIZE: tl.constexpr,
-):
-    """
-    This function multiplies each element of the tensor pointed by X_ptr with the value pointed by grad_output_ptr.
-    The multiplication is performed in-place on the tensor pointed by X_ptr.
-
-    Parameters:
-    X_ptr: Pointer to the input tensor.
-    X_stride (int): The stride of the input tensor.
-    grad_output_ptr: Pointer to the gradient output value.
-    n_cols (int): The number of columns in the input tensor.
-    BLOCK_SIZE (int): The block size for Triton operations.
-    """
-
-    # Get the program ID and convert it to int64 to avoid overflow
-    program_id = tl.program_id(0).to(tl.int64)
-
-    # Locate the start index
-    X_ptr += program_id * X_stride
-
-    # Load the gradient output value
-    grad_output_ptr += program_id * grad_output_stride
-    grad_output = tl.load(grad_output_ptr)
-
-    # Perform the element-wise multiplication
-    for i in range(0, n_cols, BLOCK_SIZE):
-        X_offsets = i + tl.arange(0, BLOCK_SIZE)
-        X_block = tl.load(X_ptr + X_offsets, mask=X_offsets < n_cols)
-        tl.store(X_ptr + X_offsets, X_block * grad_output, mask=X_offsets < n_cols)
-
-
 def cross_entropy_forward(
     _input: torch.Tensor,
     target: torch.Tensor,

transformer_engine/pytorch/triton/pad.py

@@ -2,63 +2,12 @@
 #
 # See LICENSE for license information.
 
-"""NVFP4 padding kernels
-
-TODO(ksivamani): Documentation
-
-"""
+"""PyTorch wrapper functions for padding Triton kernels."""
 
 import torch
-
 import triton
-import triton.language as tl
-
-
-@triton.autotune(
-    configs=[
-        triton.Config({"BLOCK_M": 128, "BLOCK_N": 128}, num_warps=4, num_stages=2),
-        triton.Config({"BLOCK_M": 128, "BLOCK_N": 256}, num_warps=4, num_stages=2),
-        triton.Config({"BLOCK_M": 256, "BLOCK_N": 128}, num_warps=8, num_stages=2),
-        triton.Config({"BLOCK_M": 128, "BLOCK_N": 256}, num_warps=8, num_stages=1),
-    ],
-    key=["out_dim0", "out_dim1"],
-)
-@triton.jit
-def zero_pad_kernel(
-    inp_ptr,
-    out_ptr,
-    in_dim0: tl.constexpr,
-    in_dim1: tl.constexpr,
-    out_dim0: tl.constexpr,
-    out_dim1: tl.constexpr,
-    in_s0,
-    in_s1,
-    out_s0,
-    out_s1,
-    BLOCK_M: tl.constexpr,
-    BLOCK_N: tl.constexpr,
-):
-    """Pads a tensor assuming it's a columnwise scaling inverse."""
-
-    # tile over OUTPUT coordinates
-    pid_m = tl.program_id(0)
-    pid_n = tl.program_id(1)
-    offs_m = pid_m * BLOCK_M + tl.arange(0, BLOCK_M)  # output rows
-    offs_n = pid_n * BLOCK_N + tl.arange(0, BLOCK_N)  # output cols
-    om = offs_m[:, None]
-    on = offs_n[None, :]
-
-    # edge masking for output
-    out_mask = (om < out_dim0) & (on < out_dim1)
-
-    # valid input region is simply top-left (no offsets)
-    in_mask = (om < in_dim0) & (on < in_dim1)
-
-    # load valid input, else zero (masked load touches memory only where True)
-    x = tl.load(inp_ptr + om * in_s0 + on * in_s1, mask=in_mask, other=0)
 
-    # store to output (only within bounds of the output tile)
-    tl.store(out_ptr + om * out_s0 + on * out_s1, x, mask=out_mask)
+from transformer_engine.common.triton.pad import zero_pad_kernel
 
 
 def pad_columnwise_scale_inv(inp: torch.Tensor) -> torch.Tensor: