In GCC4.8.2, mno-bmi option doesn't work

[hanhwi]

Hi, all,

I'm using GCC 4.8.2 on x86-64 machine. The compiler emits tzcnt instruction
unlike previous gcc. I want to prevent using tzcnt instruction. As I know,
tzcnt instruction is BMI extension. To disable the feature, I set -mno-bmi
but it didn't work.

Is there any way to disable tzcnt instruction?

Thanks,
Hanhwi



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