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SubjectRe: [PATCH] -mm: i386 i8259.c simplify i8259A_irq_real()
Andreas Mohr <andi@rhlx01.fht-esslingen.de> wrote:
>
> Hello all,
>
> I noticed the very "non-nice" asymmetry of i8259A_irq_real(),
> so I decided to fix the weirdly aligned branches.
> While doing this, I noticed that it could be streamlined much more,
> resulting in an astonishing 208 byte object code saving for such a tiny code
> fragment! (gcc 3.2.3)

It saves an astonishing two bytes here, with gcc-3.2.1

text data bss dec hex filename
1302 388 10 1700 6a4 arch/i386/kernel/i8259.o

1300 388 10 1698 6a2 arch/i386/kernel/i8259.o

;)



And with gcc-4.2.0:

bix:/usr/src/25> size arch/i386/kernel/i8259.o
text data bss dec hex filename
1340 356 12 1708 6ac arch/i386/kernel/i8259.o

1335 356 12 1703 6a7 arch/i386/kernel/i8259.o


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