# Copyright 1999-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

ROCM_SKIP_GLOBALS=1
PYTHON_COMPAT=( python3_{10..14} )

LLVM_COMPAT=( 20 )

inherit cmake flag-o-matic multiprocessing llvm-r1 python-any-r1 rocm
DESCRIPTION="General matrix-matrix operations library for AMD Instinct accelerators"
HOMEPAGE="https://github.com/ROCm/rocm-libraries/tree/develop/projects/hipblaslt"
SRC_URI="https://github.com/ROCm/hipBLASLt/archive/rocm-${PV}.tar.gz -> ${P}.tar.gz"
S="${WORKDIR}/hipBLASLt-rocm-${PV}"

LICENSE="MIT"
SLOT="0/$(ver_cut 1-2)"
KEYWORDS="~amd64"

SUPPORTED_GPUS=( gfx908 gfx90a gfx940 gfx941 gfx942 gfx950 gfx1100 gfx1101 gfx1103 gfx1150 gfx1151 gfx1200 gfx1201 )
IUSE_TARGETS=( "${SUPPORTED_GPUS[@]/#/amdgpu_targets_}" )
IUSE="${IUSE_TARGETS[*]/#/+} benchmark roctracer test"
RESTRICT="!test? ( test )"

RDEPEND="
	dev-util/hip:${SLOT}
	roctracer? ( dev-util/roctracer:${SLOT} )
	benchmark? (
		dev-util/rocm-smi:${SLOT}
		sci-libs/lapack
		sci-libs/openblas
	)
"

DEPEND="
	${RDEPEND}
	dev-cpp/msgpack-cxx
	sci-libs/hipBLAS-common:${SLOT}
"
BDEPEND="
	${PYTHON_DEPS}
	dev-build/rocm-cmake:${SLOT}
	dev-util/hipcc:${SLOT}
	$(python_gen_any_dep "
		dev-python/msgpack[\${PYTHON_USEDEP}]
		dev-python/pyyaml[\${PYTHON_USEDEP}]
		dev-python/joblib[\${PYTHON_USEDEP}]
		dev-python/nanobind[\${PYTHON_USEDEP}]
		dev-python/setuptools[\${PYTHON_USEDEP}]
	")
	$(llvm_gen_dep "llvm-core/clang:\${LLVM_SLOT}")
	test? (
		dev-cpp/gtest
		virtual/blas
		dev-util/rocm-smi:${SLOT}
	)
	benchmark? (
		virtual/blas
		llvm-runtimes/openmp
	)
"

PATCHES=(
	"${FILESDIR}"/${PN}-6.1.1-fix-msgpack-dependency.patch
	"${FILESDIR}"/${PN}-6.1.1-no-git.patch
	"${FILESDIR}"/${PN}-6.1.1-clang-19.patch
	"${FILESDIR}"/${PN}-6.4.1-min-pip-install.patch
	"${FILESDIR}"/${PN}-6.4.1-headers.patch
	"${FILESDIR}"/${PN}-6.4.1-gentoopath.patch
	"${FILESDIR}"/${PN}-7.0.1-system-nanobind.patch
	"${FILESDIR}"/${PN}-7.0.1-no-arch.patch
	"${FILESDIR}"/${PN}-7.0.1-fix-setuptools.patch
)

python_check_deps() {
	python_has_version "dev-python/msgpack[${PYTHON_USEDEP}]" &&
	python_has_version "dev-python/pyyaml[${PYTHON_USEDEP}]" &&
	python_has_version "dev-python/joblib[${PYTHON_USEDEP}]" &&
	python_has_version "dev-python/nanobind[${PYTHON_USEDEP}]" &&
	python_has_version "dev-python/setuptools[${PYTHON_USEDEP}]"
}

pkg_setup() {
	QA_FLAGS_IGNORED="usr/$(get_libdir)/hipblaslt/library/.*"
	python-any-r1_pkg_setup
}

pkg_pretend() {
	if [[ "${AMDGPU_TARGETS[*]}" = "" ]]; then
		ewarn "hipBLASLt supports only some GPUs: ${SUPPORTED_GPUS[*]},"
		ewarn "but none of them were defined in AMDGPU_TARGETS USE_EXPAND variable."
		ewarn
		ewarn "Library will continue to be built in \"dummy\" mode,"
		ewarn "serving as a non-functional placeholder for end-user applications."
	fi
}

src_prepare() {
	local shebangs=($(grep -rl "#!/usr/bin/env python3" tensilelite/Tensile || die))
	python_fix_shebang -q "${shebangs[@]}"

	rocm_use_clang

	sed -e "s:\$(ROCM_PATH)/bin/amdclang++:$(get_llvm_prefix)/bin/clang++:g" \
		-i tensilelite/Makefile || die

	# Fix compiler validation (just a validation)
	sed "s/amdclang/$(basename "$CC")/g" \
		-i tensilelite/Tensile/Toolchain/Validators.py \
		-i tensilelite/Tensile/Tests/unit/test_MatrixInstructionConversion.py || die

	# sed -e "s:rocm_path + \"/bin/amdclang++\":$(get_llvm_prefix)/bin/clang++:" \
	# 	-i tensilelite/rocisa/test/test_base.py \
	# 	-i tensilelite/rocisa/test/test_container.py || die

	# https://github.com/ROCm/rocm-libraries/commit/48c5e89fd90caff65e62e6a9bcf082d10d8877eb
	sed -e 's:if(NOT ROCM_FOUND):if(NOT ROCmCMakeBuildTools_FOUND):' \
		-i cmake/Dependencies.cmake || die

	cmake_src_prepare
}

src_configure() {
	rocm_use_clang

	# too many warnings
	append-cxxflags -Wno-explicit-specialization-storage-class

	local targets="$(get_amdgpu_flags)"
	local Tensile_SKIP_BUILD=$([ "${AMDGPU_TARGETS[*]}" = "" ] && echo ON || echo OFF )
	local HIPBLASLT_ENABLE_DEVICE=$([ "${AMDGPU_TARGETS[*]}" != "" ] && echo ON || echo OFF )

	local mycmakeargs=(
		-DROCM_SYMLINK_LIBS=OFF
		-DTensile_SKIP_BUILD=${Tensile_SKIP_BUILD}
		-DHIPBLASLT_ENABLE_DEVICE=${HIPBLASLT_ENABLE_DEVICE}
		-DTensile_COMPILER=${CXX}
		-DAMDGPU_TARGETS="${targets}"
		-DBUILD_CLIENTS_TESTS=$(usex test ON OFF)
		-DBUILD_CLIENTS_BENCHMARKS="$(usex benchmark ON OFF)"
		-DPython_EXECUTABLE="${PYTHON}"
		-DHIPBLASLT_ENABLE_MARKER="$(usex roctracer ON OFF)"\
		-DHIPBLASLT_USE_ROCROLLER=OFF
		-DTensile_CPU_THREADS=$(makeopts_jobs)
		-Dnanobind_DIR="$(python_get_sitedir)/nanobind/cmake"
		-Wno-dev
	)

	cmake_src_configure
}

src_compile() {
	local -x ROCM_PATH="${EPREFIX}/usr"
	# set PYTHONPATH to load Tensile from virtualenv, not the system-wide one
	local -x PYTHONPATH="${S}_build/virtualenv/lib/${EPYTHON}/site-packages"
	local -x TENSILE_ROCM_ASSEMBLER_PATH="$(get_llvm_prefix)/bin/clang++"
	# TensileCreateLibrary reads CMAKE_CXX_COMPILER again
	local -x CMAKE_CXX_COMPILER="$(get_llvm_prefix)/bin/clang++"
	cmake_src_compile
}

src_install() {
	cmake_src_install

	# Stop llvm-strip from removing .strtab section from *.hsaco files,
	# otherwise rocclr/elf/elf.cpp complains with "failed: null sections(STRTAB)" and crashes
	dostrip -x /usr/$(get_libdir)/hipblaslt/library/
}

src_test() {
	check_amdgpu

	# Expected time for 7900 XTX: 340s (full) or 5s with GTEST_FILTER='*quick*'
	# Fails in `MatrixTransformTest.MultipleDevices` in dGPU+iGPU combination
	HIP_VISIBLE_DEVICES=0 cmake_src_test
}