#
# Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

include MakeFileStart.gmk

################################################################################
# This file is responsible for updating the generated sleef source code files
# that are checked in to the JDK repo, and that are actually used when building.
# This target needs to be re-run every time the source code of libsleef is
# updated from upstream.
################################################################################

include CopyFiles.gmk
include Execute.gmk

ifneq ($(COMPILE_TYPE), cross)
  $(error Only cross-compilation of libsleef is currently supported)
endif

ifeq ($(CMAKE), )
  $(error CMake not found. Please install cmake and rerun configure)
endif

ifneq ($(OPENJDK_BUILD_OS), linux)
  $(error This target is only supported on linux)
endif

SLEEF_SUPPORT_DIR := $(MAKESUPPORT_OUTPUTDIR)/sleef
SLEEF_SOURCE_BASE_DIR := $(TOPDIR)/src/jdk.incubator.vector/linux/native/libsleef
SLEEF_SOURCE_DIR := $(SLEEF_SOURCE_BASE_DIR)/upstream
SLEEF_TARGET_DIR := $(SLEEF_SOURCE_BASE_DIR)/generated
SLEEF_NATIVE_BUILD_DIR := $(SLEEF_SUPPORT_DIR)/native
SLEEF_CROSS_BUILD_DIR := $(SLEEF_SUPPORT_DIR)/cross

ifeq ($(OPENJDK_TARGET_CPU), aarch64)
  CROSS_COMPILATION_FILENAMES := sleefinline_advsimd.h sleefinline_sve.h
  EXTRA_CROSS_OPTIONS := -DSLEEF_ENFORCE_SVE=TRUE
else ifeq ($(OPENJDK_TARGET_CPU), riscv64)
  CROSS_COMPILATION_FILENAMES := sleefinline_rvvm1.h
  EXTRA_CROSS_OPTIONS := -DSLEEF_ENFORCE_RVVM1=TRUE
else
  $(error Unsupported platform)
endif
CROSS_COMPILATION_SRC_FILES := $(addprefix $(SLEEF_CROSS_BUILD_DIR)/include/, \
    $(CROSS_COMPILATION_FILENAMES))

ifeq ($(TOOLCHAIN_TYPE), clang)
  SLEEF_TOOLCHAIN_TYPE := llvm
else
  SLEEF_TOOLCHAIN_TYPE := $(TOOLCHAIN_TYPE)
endif

SLEEF_CMAKE_FILE := toolchains/$(OPENJDK_TARGET_CPU)-$(SLEEF_TOOLCHAIN_TYPE).cmake

# We need to run CMake twice, first using it to configure the build, and then
# to actually build; and we need to do this twice, once for a native build
# and once for the cross-compilation build.

$(eval $(call SetupExecute, sleef_native_config, \
    INFO := Configuring native sleef build, \
    OUTPUT_DIR := $(SLEEF_NATIVE_BUILD_DIR), \
    COMMAND := cd $(SLEEF_SOURCE_DIR) && $(CMAKE) -S . -B \
        $(SLEEF_NATIVE_BUILD_DIR), \
))

TARGETS := $(sleef_native_config)

$(eval $(call SetupExecute, sleef_native_build, \
    INFO := Building native sleef, \
    DEPS := $(sleef_native_config), \
    OUTPUT_DIR := $(SLEEF_NATIVE_BUILD_DIR), \
    COMMAND := cd $(SLEEF_SOURCE_DIR) && $(CMAKE) --build \
        $(SLEEF_NATIVE_BUILD_DIR) -j, \
))

TARGETS := $(sleef_native_build)

$(eval $(call SetupExecute, sleef_cross_config, \
    INFO := Configuring cross-compiling sleef build, \
    DEPS := $(sleef_native_build), \
    OUTPUT_DIR := $(SLEEF_CROSS_BUILD_DIR), \
    COMMAND := cd $(SLEEF_SOURCE_DIR) && $(CMAKE) -S . -B \
        $(SLEEF_CROSS_BUILD_DIR) \
        -DCMAKE_C_COMPILER=$(CC) \
        -DCMAKE_TOOLCHAIN_FILE=$(SLEEF_CMAKE_FILE) \
        -DNATIVE_BUILD_DIR=$(SLEEF_NATIVE_BUILD_DIR) \
        -DSLEEF_BUILD_INLINE_HEADERS=TRUE \
        $(EXTRA_CROSS_OPTIONS), \
))

TARGETS := $(sleef_cross_config)

$(eval $(call SetupExecute, sleef_cross_build, \
    INFO := Building cross-compiling sleef, \
    DEPS := $(sleef_cross_config), \
    OUTPUT_DIR := $(SLEEF_NATIVE_BUILD_DIR), \
    COMMAND := cd $(SLEEF_SOURCE_DIR) && $(CMAKE) --build \
        $(SLEEF_CROSS_BUILD_DIR) -j, \
))

TARGETS := $(sleef_cross_build)

$(CROSS_COMPILATION_SRC_FILES): $(sleef_cross_build)

# Finally, copy the generated files (and one needed static file) into our
# target directory.

$(eval $(call SetupCopyFiles, copy_static_sleef_source, \
    FILES := $(SLEEF_SOURCE_DIR)/src/common/misc.h, \
    DEST := $(SLEEF_TARGET_DIR), \
))

TARGETS := $(copy_static_sleef_source)

$(eval $(call SetupCopyFiles, copy_generated_sleef_source, \
    FILES := $(CROSS_COMPILATION_SRC_FILES), \
    DEST := $(SLEEF_TARGET_DIR), \
))

TARGETS := $(copy_generated_sleef_source)

################################################################################

include MakeFileEnd.gmk