The K6 at least assists in this by raising an interrupt if a process
accesses special registers one or more task switches. Special registers
being MMX, FPU, and possibly 3Dnow registers.
It also sports SYSCALL and SYSRET instructions; I wonder if they would
provide any speed gain if used with Linux or compatibility syscalls.
Jeff
--
"Nuclear war can ruin your whole compile."
-- Karl Lehenbauer
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