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Kijewski/reg_nop()

Created March 4, 2012 09:54
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an expensive, pipeline hostile nop
Raw
reg_nop()
.global reg_nop
.macro round
xor %eax, %ebx
xor %ebx, %ecx
xor %ecx, %edx
xor %edx, %eax
.endm
.macro reg_rol
round
round
round
round
xor %edx, %eax
.endm
.macro reg_nop
reg_rol
reg_rol
reg_rol
reg_rol
.endm
reg_nop:
reg_nop
ret
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