k256

p521: projective arithmetic tests #1968

Job	Run time
benches (1.65.0)	7m 2s
build (1.65.0, thumbv7em-none-eabi)	6m 18s
benches (stable)	2m 39s
build (1.65.0, wasm32-unknown-unknown)	5m 23s
build (stable, thumbv7em-none-eabi)	1m 9s
test (i686-unknown-linux-gnu, 1.65.0, sudo apt update && sudo apt install gcc-multilib)	5m 21s
build (stable, wasm32-unknown-unknown)	56s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	2m 42s
test (x86_64-unknown-linux-gnu, 1.65.0)	7m 15s
test (x86_64-unknown-linux-gnu, stable)	2m 44s
cross (armv7-unknown-linux-gnueabihf, 1.65.0)	6m 57s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 26s
doc	34s
cross (aarch64-unknown-linux-gnu, 1.65.0)	8m 25s
cross (aarch64-unknown-linux-gnu, stable)	1m 23s
cross (powerpc-unknown-linux-gnu, 1.65.0)	6m 40s
cross (powerpc-unknown-linux-gnu, stable)	1m 26s
	1h 8m 20s

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