p256: Use 3 less additions in addition chain for scalar inversion. #3943

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Job	Run time
audit	11s
rustfmt	5s
deny	10s
cargo-semver-checks	20s
rustdoc	12s
clippy	15s
package	1m 51s
coverage (--features=std, aarch64-apple-darwin, nightly)	43s
test-bench	29s
coverage (--features=std, aarch64-unknown-linux-gnu, nightly)	3m 10s
coverage (--features=std, arm-unknown-linux-gnueabi, nightly)	3m 11s
coverage (--features=std, armv7-unknown-linux-gnueabihf, nightly)	2m 59s
test (aarch64-apple-darwin, stable)	30s
coverage (--features=std, powerpc-unknown-linux-gnu, nightly)	16m 34s
test (aarch64-apple-darwin, 1.63.0)	1m 35s
test-doc (stable)	39s
coverage (--features=std, powerpc64-unknown-linux-gnu, nightly)	4m 27s
test (aarch64-apple-darwin, --release, stable)	1m 31s
test-doc (nightly)	23s
test (aarch64-apple-darwin, --release, 1.63.0)	2m 31s
coverage (--features=std, powerpc64le-unknown-linux-gnu, nightly)	4m 25s
test (aarch64-apple-ios, stable)	23s
coverage (--features=std, riscv64gc-unknown-linux-gnu, nightly)	4m 46s
test (aarch64-apple-ios, 1.63.0)	1m 35s
coverage (--features=std, s390x-unknown-linux-gnu, nightly)	6m 7s
test (aarch64-apple-ios, --release, stable)	1m 17s
coverage (--features=std, x86_64-apple-darwin, nightly)	1m 2s
coverage (--features=std, x86_64-unknown-linux-musl, nightly)	2m 4s
test-features (--no-default-features, aarch64-unknown-linux-musl, --release, stable)	6m 9s
test (aarch64-apple-ios, --release, 1.63.0)	1m 51s
coverage (--features=unstable-testing-arm-no-hw,std, aarch64-unknown-linux-gnu, nightly, ubuntu-2...	2m 54s
test-features (--no-default-features, aarch64-unknown-linux-musl, --release, nightly)	6m 15s
test (aarch64-linux-android, stable)	32s
coverage (--features=unstable-testing-arm-no-neon,std, armv7-unknown-linux-gnueabihf, nightly, ub...	3m 26s
test-features (--no-default-features, aarch64-unknown-linux-musl, --release, 1.63.0)	7m 15s
test (aarch64-linux-android, 1.63.0)	1m 43s
test (aarch64-linux-android, --release, stable)	1m 16s
test-features (--no-default-features, i686-pc-windows-msvc, --release, stable)	5m 1s
coverage (i686-unknown-linux-gnu, --features=std, nightly, ubuntu-22.04)	1m 46s
test (aarch64-linux-android, --release, 1.63.0)	2m 14s
coverage (i686-unknown-linux-gnu, --features=std, nightly, Conroe-v1, ubuntu-22.04)	6m 11s
test-features (--no-default-features, i686-pc-windows-msvc, --release, nightly)	4m 52s
test (aarch64-pc-windows-msvc, stable)	2m 36s
test (aarch64-pc-windows-msvc, 1.63.0)	2m 24s
coverage (x86_64-unknown-linux-gnu, --features=std, nightly, Conroe-v1, ubuntu-22.04)	3m 9s
test (aarch64-pc-windows-msvc, --release, stable)	2m 54s
coverage (x86_64-unknown-linux-gnu, --features=std, nightly, Denverton-v2, ubuntu-22.04)	3m 1s
test-features (--no-default-features, i686-pc-windows-msvc, --release, 1.63.0)	5m 56s
test (aarch64-pc-windows-msvc, --release, 1.63.0)	3m 21s
test (aarch64-unknown-linux-gnu, stable)	2m 30s
test-features (--no-default-features, x86_64-unknown-linux-gnu, --release, stable)	1m 55s
test (aarch64-unknown-linux-gnu, 1.63.0)	6m 25s
test-features (--no-default-features, x86_64-unknown-linux-gnu, --release, nightly)	1m 57s
test (aarch64-unknown-linux-gnu, --release, stable)	6m 6s
test-features (--no-default-features, x86_64-unknown-linux-gnu, --release, 1.63.0)	2m 59s
test-wasm32-browser (--features=wasm32_unknown_unknown_js, ubuntu-22.04, stable, wasm32-unknown-u...	4m 27s
test (aarch64-unknown-linux-gnu, --release, 1.63.0)	7m 25s
test-features (--features=std,slow_tests, aarch64-unknown-linux-musl, --release, stable)	9m 48s
test-wasm32-browser (--features=wasm32_unknown_unknown_js, ubuntu-22.04, beta, wasm32-unknown-unk...	3m 45s
test-features (--features=std,slow_tests, aarch64-unknown-linux-musl, --release, nightly)	10m 0s
test (aarch64-unknown-linux-musl, stable)	2m 38s
test-wasm32-browser (--features=wasm32_unknown_unknown_js, ubuntu-22.04, nightly, wasm32-unknown-...	3m 49s
test (aarch64-unknown-linux-musl, 1.63.0)	5m 59s
test-features (--features=std,slow_tests, aarch64-unknown-linux-musl, --release, 1.63.0)	11m 17s
test-wasm32-browser (--features=wasm32_unknown_unknown_js, ubuntu-22.04, --release, stable, wasm3...	5m 40s
test (aarch64-unknown-linux-musl, --release, stable)	6m 16s
test-features (--features=std,slow_tests, i686-pc-windows-msvc, --release, stable)	7m 46s
test-wasm32-browser (--features=wasm32_unknown_unknown_js, ubuntu-22.04, --release, beta, wasm32-...	5m 10s
test-features (--features=std,slow_tests, i686-pc-windows-msvc, --release, nightly)	7m 47s
test (aarch64-unknown-linux-musl, --release, 1.63.0)	7m 14s
test-wasm32-browser (--features=wasm32_unknown_unknown_js, ubuntu-22.04, --release, nightly, wasm...	5m 12s
test-features (--features=std,slow_tests, i686-pc-windows-msvc, --release, 1.63.0)	9m 3s
test (arm-unknown-linux-gnueabi, stable)	2m 33s
test-wasm32-browser (--no-default-features --features=wasm32_unknown_unknown_js, ubuntu-22.04, st...	3m 54s
test-features (--features=std,slow_tests, x86_64-unknown-linux-gnu, --release, stable)	2m 41s
test (arm-unknown-linux-gnueabi, 1.63.0)	5m 57s
test-features (--features=std,slow_tests, x86_64-unknown-linux-gnu, --release, nightly)	2m 42s
test-wasm32-browser (--no-default-features --features=wasm32_unknown_unknown_js, ubuntu-22.04, be...	3m 33s
test (arm-unknown-linux-gnueabi, --release, stable)	5m 29s
test-features (--features=std,slow_tests, x86_64-unknown-linux-gnu, --release, 1.63.0)	4m 5s
test-wasm32-browser (--no-default-features --features=wasm32_unknown_unknown_js, ubuntu-22.04, ni...	4m 25s
test-wasm32-browser (--no-default-features --features=wasm32_unknown_unknown_js, ubuntu-22.04, --...	4m 59s
test (arm-unknown-linux-gnueabi, --release, 1.63.0)	6m 46s
test-wasm32-browser (--no-default-features --features=wasm32_unknown_unknown_js, ubuntu-22.04, --...	5m 36s
test (armv7-linux-androideabi, stable)	43s
test-wasm32-browser (--no-default-features --features=wasm32_unknown_unknown_js, ubuntu-22.04, --...	5m 27s
test (armv7-linux-androideabi, 1.63.0)	1m 46s
test (armv7-linux-androideabi, --release, stable)	1m 23s
test (armv7-linux-androideabi, --release, 1.63.0)	2m 18s
test (armv7-unknown-linux-musleabihf, stable)	2m 29s
test (armv7-unknown-linux-musleabihf, 1.63.0)	6m 15s
test (armv7-unknown-linux-musleabihf, --release, stable)	6m 7s
test (armv7-unknown-linux-musleabihf, --release, 1.63.0)	6m 54s
test (i686-pc-windows-msvc, stable)	1m 18s
test (i686-pc-windows-msvc, 1.63.0)	2m 47s
test (i686-pc-windows-msvc, --release, stable)	5m 51s
test (i686-pc-windows-msvc, --release, 1.63.0)	6m 9s
test (i686-unknown-linux-gnu, stable)	1m 9s
test (i686-unknown-linux-gnu, 1.63.0)	2m 31s
test (i686-unknown-linux-gnu, --release, stable)	4m 12s
test (i686-unknown-linux-gnu, --release, 1.63.0)	5m 15s
test (i686-unknown-linux-musl, stable)	1m 14s
test (i686-unknown-linux-musl, 1.63.0)	2m 33s
test (i686-unknown-linux-musl, --release, stable)	4m 23s
test (i686-unknown-linux-musl, --release, 1.63.0)	5m 32s
test (riscv64gc-unknown-linux-gnu, stable)	3m 31s
test (riscv64gc-unknown-linux-gnu, 1.63.0)	5m 44s
test (riscv64gc-unknown-linux-gnu, --release, stable)	4m 21s
test (riscv64gc-unknown-linux-gnu, --release, 1.63.0)	6m 3s
test (wasm32-wasi, stable)	2m 41s
test (wasm32-wasi, 1.63.0)	3m 52s
test (wasm32-wasi, --release, stable)	4m 20s
test (wasm32-wasi, --release, 1.63.0)	5m 10s
test (x86_64-pc-windows-gnu, stable)	2m 42s
test (x86_64-pc-windows-gnu, 1.63.0)	2m 9s
test (x86_64-pc-windows-gnu, --release, stable)	2m 45s
test (x86_64-pc-windows-gnu, --release, 1.63.0)	4m 3s
test (x86_64-pc-windows-msvc, stable)	1m 27s
test (x86_64-pc-windows-msvc, 1.63.0)	2m 8s
test (x86_64-pc-windows-msvc, --release, stable)	3m 41s
test (x86_64-pc-windows-msvc, --release, 1.63.0)	3m 41s
test (x86_64-apple-darwin, stable)	1m 15s
test (x86_64-apple-darwin, 1.63.0)	2m 43s
test (x86_64-apple-darwin, --release, stable)	2m 22s
test (x86_64-apple-darwin, --release, 1.63.0)	3m 22s
test (x86_64-unknown-linux-musl, stable)	52s
test (x86_64-unknown-linux-musl, 1.63.0)	2m 7s
test (x86_64-unknown-linux-musl, --release, stable)	2m 2s
test (x86_64-unknown-linux-musl, --release, 1.63.0)	3m 3s
test (x86_64-unknown-linux-gnu, stable)	36s
test (x86_64-unknown-linux-gnu, 1.63.0)	1m 55s
test (x86_64-unknown-linux-gnu, --release, stable)	1m 49s
test (x86_64-unknown-linux-gnu, --release, 1.63.0)	2m 54s
test (aarch64-apple-tvos, nightly, --release, macos-14, --no-run -Z build-std)	1m 6s
test (aarch64-apple-visionos, nightly, --release, macos-14, 15.2, --no-run -Z build-std)	1m 10s
test (aarch64-apple-watchos, nightly, --release, macos-14, --no-run -Z build-std)	1m 8s
test (mips-unknown-linux-gnu, --release, 1.71.0, ubuntu-22.04)	7m 56s
test (mips64el-unknown-linux-gnuabi64, --release, 1.71.0, ubuntu-22.04)	5m 9s
test (mipsel-unknown-linux-gnu, --release, 1.71.0, ubuntu-22.04)	7m 58s
test (powerpc-unknown-linux-gnu, --release, stable, ubuntu-22.04)	7m 49s
test (powerpc64-unknown-linux-gnu, --release, stable, ubuntu-22.04)	5m 0s
test (powerpc64le-unknown-linux-gnu, --release, stable, ubuntu-22.04)	5m 27s
test (s390x-unknown-linux-gnu, --release, stable, ubuntu-22.04)	10m 51s
	8h 59m 7s

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p256: Use 3 less additions in addition chain for scalar inversion. #3943

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p256: Use 3 less additions in addition chain for scalar inversion. #3943

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