SHA-2 Hash Function (Zknh) - Riscvonomicon

32-bit	64-bit
`sha256sig0`	`sha256sig0`
`sha256sig1`	`sha256sig1`
`sha256sum0`	`sha256sum0`
`sha256sum1`	`sha256sum1`
`sha512sig0h`	`sha512sig0`
`sha512sig0l`	`sha512sig1`
`sha512sig1h`	`sha512sum0`
`sha512sig1l`	`sha512sum1`
`sha512sum0r`
`sha512sum1r`