Question

What is the problem with comparing two floating-point values on early versions of the IA-32 architecture?

a.

The standard conditional branch instructions couldn’t be used

b.

The floating-point unit was not an integral part of the processor

c.

The math coprocessor couldn’t directly update the EFLAGS register

d.

Both a and c

Posted under Reverse Engineering

Answer: (d).Both a and c Explanation:To compare two floating-point values, one couldn’t just compare and conditionally branch using the standard conditional branch instructions. The problem was that the math coprocessor couldn’t directly update the EFLAGS register.

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