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The M-profile FPCCR.ASPEN bit indicates that automatic floating-point context preservation is enabled. Before executing any floating-point instruction, if FPCCR.ASPEN is set and the CONTROL FPCA/SFPA bits indicate that there is no active floating point context then we must create a new context (by initializing FPSCR and setting FPCA/SFPA to indicate that the context is now active). In the pseudocode this is handled by ExecuteFPCheck(). Implement this with a new TB flag which tracks whether we need to create a new FP context. Backports commit 6000531e19964756673a5f4b694a649ef883605a from qemu |
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