BTEST

Operation: result = arg1

arg1 = data to test bit on

arg2 = bit mask

UOP encoding

Encoding: 0x404

Modifiers

DSZ Modifier

DSZ8,DSZ16,DSZ32, DSZ64

Core2 issue

Core2 has sometimes DSZ modifier with value 180 (e.g. ADD.180, which seems to be similar to DSZ32)

References

Based on Intel x86 ISA

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