http://groups.google.com/group/android-ndk/browse_thread/thread/b41d13b517abe69d?hl=en
不知道中間Dave Buther講的這段話
On the emulator I suspect it is being (correctly) treated as an
UNDEFINED instruction (the emulator is running as an ARM926 I
believe), under user-mode on an ARM1176 or an ARMv7-a processor it
will still be treated as an UNDEFINED
while in user mode.
是什麼意思............
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1 comment:
ARM9 CPU 有以下幾個 mode
User mode,
System mode,
SVC mode,
Abort mode,
Undefined mode,
IRQ mode,
FIQ mode.
在ARM9 CPU user mode下不能操作一些CPU指令。
另外，在模擬器上，少用的ARM9CPU指令，模擬器有可能偷懶不模擬。如文章猜測是 UNDEFINED instruction。
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