Peter Maydell be197f9857 target/arm: Implement v8.1M branch-future insns (as NOPs) ... v8.1M implements a new 'branch future' feature, which is a set of instructions that request the CPU to perform a branch "in the future", when it reaches a particular execution address. In hardware, the expected implementation is that the information about the branch location and destination is cached and then acted upon when execution reaches the specified address. However the architecture permits an implementation to discard this cached information at any point, and so guest code must always include a normal branch insn at the branch point as a fallback. In particular, an implementation is specifically permitted to treat all BF insns as NOPs (which is equivalent to discarding the cached information immediately). For QEMU, implementing this caching of branch information would be complicated and would not improve the speed of execution at all, so we make the IMPDEF choice to implement all BF insns as NOPs. Backports commit 05903f036edba8e3ed940cc215b8e27fb49265b9		2021-03-01 20:25:15 -05:00
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arm	target/arm: Implement v8.1M branch-future insns (as NOPs)	2021-03-01 20:25:15 -05:00
i386	i386/cpu: Clear FEAT_XSAVE_COMP_{LO,HI} when XSAVE is not available	2021-03-01 19:04:03 -05:00
m68k	target/m68k: consolidate physical translation offset into get_physical_address()	2021-02-25 23:13:48 -05:00
mips	target/mips: Support variable page size	2020-06-14 21:09:51 -04:00
riscv	target/riscv: Set instance_align on RISCVCPU TypeInfo	2021-03-01 19:00:27 -05:00
sparc	softfloat: Name compare relation enum	2020-05-21 18:08:52 -04:00