831317b605
The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com> |
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