target/arm: implement SM4 instructions
This implements emulation of the new SM4 instructions that have been added as an optional extension to the ARMv8 Crypto Extensions in ARM v8.2. Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Message-id: 20180207111729.15737-5-ard.biesheuvel@linaro.org Reviewed-by: NPeter Maydell <peter.maydell@linaro.org> Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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