sha2: RISC-V scalar crypto extension support #614
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Aug 21, 2024
| - run: cargo build --target riscv32gc-unknown-linux-gnu -Z build-std | ||
| env: | ||
| RUSTFLAGS: '-Dwarnings --cfg sha2_backend="riscv-zknh" -C target-feature=+zknh' | ||
| - run: cargo build --target riscv32gc-unknown-linux-gnu -Z build-std |
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Note that we do not run tests on RV32 because cross currently does not support the riscv32gc-unknown-linux-gnu target.
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The support is Nightly-only and requires to enable the
sha2_backendconfiguration flag with a value equal toriscv-zknhorriscv-zknh-compact.The resulting assembly and binary size of the
compressfunction (not counting the statics with round constants):