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| { | ||
| "cells": [ | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "GT4Py - GridTools for Python\n", | ||
| "\n", | ||
| "Copyright (c) 2014-2023, ETH Zurich\n", | ||
| "All rights reserved.\n", | ||
| "\n", | ||
| "This file is part the GT4Py project and the GridTools framework.\n", | ||
| "GT4Py is free software: you can redistribute it and/or modify it under\n", | ||
| "the terms of the GNU General Public License as published by the\n", | ||
| "Free Software Foundation, either version 3 of the License, or any later\n", | ||
| "version. See the LICENSE.txt file at the top-level directory of this\n", | ||
| "distribution for a copy of the license or check <https://www.gnu.org/licenses/>.\n", | ||
| "\n", | ||
| "SPDX-License-Identifier: GPL-3.0-or-later" | ||
| ] | ||
| }, | ||
| { | ||
| "attachments": {}, | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "# Demonstrates gt4py.cartesian with gt4py.next compatibility" | ||
| ] | ||
| }, | ||
| { | ||
| "attachments": {}, | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "Imports" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": 1, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "import numpy as np\n", | ||
| "\n", | ||
| "nx = 32\n", | ||
| "ny = 32\n", | ||
| "nz = 1\n", | ||
| "dtype = np.float64" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "Storages\n", | ||
| "--\n", | ||
| "\n", | ||
| "We create fields using the gt4py.next constructors. These fields are compatible with gt4py.cartesian when we use \"I\", \"J\", \"K\" as the dimension names." | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": 2, | ||
| "metadata": {}, | ||
| "outputs": [ | ||
| { | ||
| "data": { | ||
| "text/html": [ | ||
| "<link href=\"https://fonts.googleapis.com/icon?family=Material+Icons\" rel=\"stylesheet\"><script src=\"https://spcl.github.io/dace/webclient2/dist/sdfv.js\"></script>\n", | ||
| "<link href=\"https://spcl.github.io/dace/webclient2/sdfv.css\" rel=\"stylesheet\">\n" | ||
| ], | ||
| "text/plain": [ | ||
| "<IPython.core.display.HTML object>" | ||
| ] | ||
| }, | ||
| "metadata": {}, | ||
| "output_type": "display_data" | ||
| } | ||
| ], | ||
| "source": [ | ||
| "import gt4py.next as gtx\n", | ||
| "\n", | ||
| "allocator = gtx.itir_embedded # should match the executor\n", | ||
| "# allocator = gtx.gtfn_cpu\n", | ||
| "# allocator = gtx.gtfn_gpu\n", | ||
| "\n", | ||
| "# Note: for gt4py.next, names don't matter, for gt4py.cartesian they have to be \"I\", \"J\", \"K\"\n", | ||
| "I = gtx.Dimension(\"I\")\n", | ||
| "J = gtx.Dimension(\"J\")\n", | ||
| "K = gtx.Dimension(\"K\", kind=gtx.DimensionKind.VERTICAL)\n", | ||
| "\n", | ||
| "domain = gtx.domain({I: nx, J: ny, K: nz})\n", | ||
| "\n", | ||
| "inp = gtx.as_field(domain, np.fromfunction(lambda x, y, z: x**2+y**2, shape=(nx, ny, nz)), dtype, allocator=allocator)\n", | ||
| "out_cartesian = gtx.zeros(domain, dtype, allocator=allocator)\n", | ||
| "out_next = gtx.zeros(domain, dtype, allocator=allocator)" | ||
| ] | ||
| }, | ||
| { | ||
| "attachments": {}, | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "gt4py.cartesian\n", | ||
| "--" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": 3, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "import gt4py.cartesian.gtscript as gtscript\n", | ||
| "\n", | ||
| "cartesian_backend = \"numpy\"\n", | ||
| "# cartesian_backend = \"gt:cpu_ifirst\"\n", | ||
| "# cartesian_backend = \"gt:gpu\"\n", | ||
| "\n", | ||
| "@gtscript.stencil(backend=cartesian_backend)\n", | ||
| "def lap_cartesian(\n", | ||
| " inp: gtscript.Field[dtype],\n", | ||
| " out: gtscript.Field[dtype],\n", | ||
| "):\n", | ||
| " with computation(PARALLEL), interval(...):\n", | ||
| " out = -4.0 * inp[0, 0, 0] + inp[-1, 0, 0] + inp[1, 0, 0] + inp[0, -1, 0] + inp[0, 1, 0]\n", | ||
| "\n", | ||
| "lap_cartesian(inp=inp, out=out_cartesian, origin=(1, 1, 0), domain=(nx-2, ny-2, nz))" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": 4, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "from gt4py.next import Field\n", | ||
| "\n", | ||
| "next_backend = gtx.itir_embedded\n", | ||
| "# next_backend = gtx.gtfn_cpu\n", | ||
| "# next_backend = gtx.gtfn_gpu\n", | ||
| "\n", | ||
| "Ioff = gtx.FieldOffset(\"I\", source=I, target=(I,))\n", | ||
| "Joff = gtx.FieldOffset(\"J\", source=J, target=(J,))\n", | ||
| "\n", | ||
| "@gtx.field_operator\n", | ||
| "def lap_next(inp: Field[[I, J, K], dtype]) -> Field[[I, J, K], dtype]:\n", | ||
| " return -4.0 * inp + inp(Ioff[-1]) + inp(Ioff[1]) + inp(Joff[-1]) + inp(Joff[1])\n", | ||
| "\n", | ||
| "@gtx.program(backend=next_backend)\n", | ||
| "def lap_next_program(inp: Field[[I, J, K], dtype], out: Field[[I, J, K], dtype]):\n", | ||
| " lap_next(inp, out=out[1:-1, 1:-1, :])\n", | ||
| "\n", | ||
| "lap_next_program(inp, out_next, offset_provider={\"Ioff\": I, \"Joff\": J})" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": 5, | ||
| "metadata": {}, | ||
| "outputs": [], | ||
| "source": [ | ||
| "assert np.allclose(out_cartesian.asnumpy(), out_next.asnumpy())" | ||
| ] | ||
| } | ||
| ], | ||
| "metadata": { | ||
| "kernelspec": { | ||
| "display_name": "Python 3 (ipykernel)", | ||
| "language": "python", | ||
| "name": "python3" | ||
| }, | ||
| "language_info": { | ||
| "codemirror_mode": { | ||
| "name": "ipython", | ||
| "version": 3 | ||
| }, | ||
| "file_extension": ".py", | ||
| "mimetype": "text/x-python", | ||
| "name": "python", | ||
| "nbconvert_exporter": "python", | ||
| "pygments_lexer": "ipython3", | ||
| "version": "3.10.13" | ||
| } | ||
| }, | ||
| "nbformat": 4, | ||
| "nbformat_minor": 4 | ||
| } |
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