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BOOK: Professional Assembly Language
This is the forum to discuss the Wrox book Professional Assembly Language by Richard Blum; ISBN: 9780764579011
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Old December 23rd, 2012, 07:59 PM
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Default i need some help!

i come across a question when i read the page 149-150 of the book.
the code source below:
if (eax < ebx) || (eax == ecx) creates the following assembly language code:
cmpl %eax, %ebx
jle else
cmpl %eax, %ecx
jne else
< then logic code>
jmp end
< else logic code >
This If statement condition required two separate CMP instructions. Because the logical operator is
an OR, if either CMP instruction evaluates to true, the program jumps to the else label. If the logical
operator is an AND, you would need to use an intermediate label to ensure that both CMP instructions
evaluate to true.
i think it should use if (eax < ebx) && (eax == ecx) instead of if (eax < ebx) || (eax == ecx)
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