target-arm: A64: add support for conditional branches
This patch adds emulation for the conditional branch (b.cond) instruction. Signed-off-by: NAlexander Graf <agraf@suse.de> [claudio: adapted to new decoder structure, reused arm infrastructure for checking the flags] Signed-off-by: NClaudio Fontana <claudio.fontana@linaro.org> Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> Reviewed-by: NRichard Henderson <rth@twiddle.net>
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