fix fuzz 5 reloaded: endianness issue for exponent MSB #1094

Workflow file for this run

	name: Constantine CI
	on: [push, pull_request]

	jobs:
	build:
	strategy:
	fail-fast: false
	max-parallel: 20
	matrix:
	nim_version: [version-1-6] # [version-1-4, devel]
	target:
	- os: linux
	cpu: amd64
	TEST_LANG: c
	BACKEND: NO_ASM

	# 32-bit CI failing with https://github.com/mratsim/constantine/issues/244
	# "E: Unable to correct problems, you have held broken packages.""
	# - os: linux
	# cpu: i386
	# TEST_LANG: c
	# BACKEND: NO_ASM
	- os: linux
	cpu: amd64
	TEST_LANG: c
	BACKEND: ASM
	- os: windows
	cpu: amd64
	TEST_LANG: c
	BACKEND: NO_ASM
	- os: windows
	cpu: amd64
	TEST_LANG: c
	BACKEND: ASM
	- os: macos
	cpu: amd64
	TEST_LANG: c
	BACKEND: NO_ASM
	- os: macos
	cpu: amd64
	TEST_LANG: c
	BACKEND: ASM
	include:
	- target:
	os: linux
	builder: ubuntu-latest
	- target:
	os: macos
	builder: macos-latest
	- target:
	os: windows
	builder: windows-latest
	name: '${{ matrix.target.os }}-${{ matrix.target.cpu }}-${{ matrix.target.TEST_LANG }}-${{ matrix.target.BACKEND }} (${{ matrix.nim_version }})'
	runs-on: ${{ matrix.builder }}
	steps:
	- name: Get branch name
	shell: bash
	run: \|
	if [[ '${{ github.event_name }}' == 'pull_request' ]]; then
	echo "##[set-output name=branch_name;]$(echo ${GITHUB_HEAD_REF})"
	echo "Branch found (PR): ${GITHUB_HEAD_REF}"
	else
	echo "##[set-output name=branch_name;]$(echo ${GITHUB_REF#refs/heads/})"
	echo "Branch found (not PR): ${GITHUB_REF#refs/heads/}"
	fi
	id: get_branch

	- name: Cancel Previous Runs (except master)
	if: >
	steps.get_branch.outputs.branch_name != 'master'
	uses: styfle/[email protected]
	with:
	access_token: ${{ github.token }}

	- name: Checkout constantine
	uses: actions/checkout@v2
	with:
	path: constantine

	- name: Restore MinGW-W64 (Windows) from cache
	if: runner.os == 'Windows'
	id: windows-mingw-cache
	uses: actions/cache@v2
	with:
	path: external/mingw-${{ matrix.target.cpu }}
	key: 'mingw-${{ matrix.target.cpu }}'
	- name: Restore Nim DLLs dependencies (Windows) from cache
	if: runner.os == 'Windows'
	id: windows-dlls-cache
	uses: actions/cache@v2
	with:
	path: external/dlls-${{ matrix.target.cpu }}
	key: 'dlls-${{ matrix.target.cpu }}'
	- name: Install MinGW64 dependency (Windows)
	if: >
	steps.windows-mingw-cache.outputs.cache-hit != 'true' &&
	runner.os == 'Windows'
	shell: bash
	run: \|
	mkdir -p external
	if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
	MINGW_URL="https://github.com/brechtsanders/winlibs_mingw/releases/download/11.1.0-12.0.0-9.0.0-r2/winlibs-x86_64-posix-seh-gcc-11.1.0-mingw-w64-9.0.0-r2.7z"
	ARCH=64
	else
	MINGW_URL="https://github.com/brechtsanders/winlibs_mingw/releases/download/11.1.0-12.0.0-9.0.0-r2/winlibs-i686-posix-dwarf-gcc-11.1.0-mingw-w64-9.0.0-r2.7z"
	ARCH=32
	fi
	curl -L "$MINGW_URL" -o "external/mingw-${{ matrix.target.cpu }}.7z"
	7z x -y "external/mingw-${{ matrix.target.cpu }}.7z" -oexternal/
	mv external/mingw$ARCH external/mingw-${{ matrix.target.cpu }}
	- name: Install DLLs dependencies (Windows)
	if: >
	steps.windows-dlls-cache.outputs.cache-hit != 'true' &&
	runner.os == 'Windows'
	shell: bash
	run: \|
	mkdir -p external
	curl -L "https://nim-lang.org/download/windeps.zip" -o external/windeps.zip
	7z x -y external/windeps.zip -oexternal/dlls-${{ matrix.target.cpu }}
	- name: Path to cached dependencies (Windows)
	if: >
	runner.os == 'Windows'
	shell: bash
	run: \|
	echo '${{ github.workspace }}'"/external/mingw-${{ matrix.target.cpu }}/bin" >> $GITHUB_PATH
	echo '${{ github.workspace }}'"/external/dlls-${{ matrix.target.cpu }}" >> $GITHUB_PATH

	- name: Restore Nim from cache
	if: matrix.nim_version != 'devel'
	id: nim-compiler-cache
	uses: actions/cache@v2
	with:
	path: '${{ github.workspace }}/nim-${{ matrix.nim_version }}-${{ matrix.target.cpu }}'
	key: 'nim-${{ matrix.target.cpu }}-${{ matrix.nim_version }}'

	- name: Setup Nim
	if: steps.nim-compiler-cache.outputs.cache-hit != 'true'
	uses: alaviss/[email protected]
	with:
	path: 'nim-${{ matrix.nim_version }}-${{ matrix.target.cpu }}'
	version: ${{ matrix.nim_version }}
	architecture: ${{ matrix.target.cpu }}
	add-to-path: false

	- name: Path to cached Nim
	shell: bash
	run: \|
	echo '${{ github.workspace }}'"/nim-${{ matrix.nim_version }}-${{ matrix.target.cpu }}/bin" >> $GITHUB_PATH
	echo '${{ github.workspace }}'"/.nimble/bin" >> $GITHUB_PATH

	- name: Install test dependencies (Linux amd64)
	if: runner.os == 'Linux' && matrix.target.cpu == 'amd64'
	run: \|
	sudo DEBIAN_FRONTEND='noninteractive' apt-fast install \
	--no-install-recommends -yq \
	libgmp-dev

	- name: Install test dependencies (Linux i386)
	if: runner.os == 'Linux' && matrix.target.cpu == 'i386'
	run: \|
	sudo dpkg --add-architecture i386
	sudo apt-fast update -qq

	# Try to fix "E: Unable to correct problems, you have held broken packages."
	sudo apt-fast clean

	sudo DEBIAN_FRONTEND='noninteractive' apt-fast install \
	--no-install-recommends -yq \
	gcc-multilib g++-multilib \
	libssl-dev:i386 libgmp-dev:i386

	mkdir -p external/bin
	cat << EOF > external/bin/gcc
	#!/bin/bash
	exec $(which gcc) -m32 "\$@"
	EOF
	cat << EOF > external/bin/g++
	#!/bin/bash
	exec $(which g++) -m32 "\$@"
	EOF
	chmod 755 external/bin/{gcc,g++}
	echo '${{ github.workspace }}/external/bin' >> $GITHUB_PATH

	- name: Install test dependencies (macOS)
	if: runner.os == 'macOS'
	run: \|
	brew install gmp
	mkdir -p external/bin
	cat << EOF > external/bin/clang
	#!/bin/bash
	exec $(brew --prefix llvm@15)/bin/clang "\$@"
	EOF
	cat << EOF > external/bin/clang++
	#!/bin/bash
	exec $(brew --prefix llvm@15)/bin/clang++ "\$@"
	EOF
	chmod 755 external/bin/{clang,clang++}
	echo '${{ github.workspace }}/external/bin' >> $GITHUB_PATH

	- name: Setup MSYS2 (Windows)
	if: runner.os == 'Windows'
	uses: msys2/setup-msys2@v2
	with:
	path-type: inherit
	update: false
	install: base-devel git mingw-w64-x86_64-toolchain

	- name: Install test dependencies (Windows)
	if: runner.os == 'Windows'
	shell: msys2 {0}
	run: \|
	pacman -S --needed --noconfirm mingw-w64-x86_64-gmp
	nimble refresh --verbose -y
	nimble install --verbose -y gmp jsony asynctools

	- name: Install test dependencies
	if: runner.os != 'Windows'
	shell: bash
	run: \|
	nimble refresh --verbose -y
	nimble install --verbose -y gmp jsony asynctools

	- name: Print Nim & compiler versions
	shell: bash
	# gcc is an alias to Clang on MacOS
	run: \|
	nim -v
	gcc -v

	- name: Run Constantine tests (UNIX with Assembly)
	if: runner.os != 'Windows' && matrix.target.BACKEND == 'ASM'
	shell: bash
	run: \|
	cd constantine
	nimble bindings --verbose
	nimble test_bindings --verbose
	nimble test_parallel --verbose
	- name: Run Constantine tests (UNIX no Assembly)
	if: runner.os != 'Windows' && matrix.target.BACKEND == 'NO_ASM'
	shell: bash
	run: \|
	cd constantine
	CTT_ASM=0 nimble bindings --verbose
	nimble test_bindings --verbose
	CTT_ASM=0 nimble test_parallel --verbose
	- name: Run Constantine tests (Windows with Assembly)
	# So "test_bindings" uses C and can find GMP
	# but nim-gmp cannot find GMP on Windows CI
	if: runner.os == 'Windows' && matrix.target.BACKEND == 'ASM'
	shell: msys2 {0}
	run: \|
	cd constantine
	nimble bindings --verbose
	nimble test_bindings --verbose
	nimble test_parallel_no_gmp --verbose
	- name: Run Constantine tests (Windows no Assembly)
	# So "test_bindings" uses C and can find GMP
	# but nim-gmp cannot find GMP on Windows CI
	if: runner.os == 'Windows' && matrix.target.BACKEND == 'NO_ASM'
	shell: msys2 {0}
	run: \|
	cd constantine
	CTT_ASM=0 nimble bindings --verbose
	nimble test_bindings --verbose
	CTT_ASM=0 nimble test_parallel_no_gmp --verbose

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fix fuzz 5 reloaded: endianness issue for exponent MSB #1094

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fix fuzz 5 reloaded: endianness issue for exponent MSB #1094

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