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M profile doesn't have the MSR(banked) and MRS(banked) instructions and uses the encodings for different kinds of M-profile MRS/MSR. Guard the relevant bits of the decode logic to make sure we don't accidentally fall into them by accident on M-profile. (The bit being checked for this (bit 5) is part of the SYSm field on M-profile, but since no currently allocated system registers have encodings with bit 5 of SYSm set, this hasn't been a problem in practice.) Backports commit 43ac65742319ef5ac4461daf43316b189cd21e89 from qemu |
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mips | ||
sparc |