cmov: use macros to write tests (#1290) #93

Job	Run time
test-miri (s390x-unknown-linux-gnu)	57s
test-careful	54s
build (1.85.0, wasm32-unknown-unknown)	18s
test (stable)	17s
test (1.85.0)	18s
test-miri (x86_64-unknown-linux-gnu)	40s
build (stable, thumbv7em-none-eabi)	11s
build (1.85.0, thumbv7em-none-eabi)	16s
minimal-versions / minimal-versions	25s
build (stable, wasm32-unknown-unknown)	9s
	4m 25s

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