Davide Libenzi wrote:
> On Tue, 25 Sep 2007, roel wrote:
>
>>> + if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
>> if (!((ap->flags & ATA_FLAG_IPM) && ata_dev_enabled(dev))) {
>
> int foo(int i, int j) {
>
> return !(i & 8) || !j;
> }
>
> int moo(int i, int j) {
>
> return !((i & 8) && j);
> }
>
>
> gcc -O2 -S:
>
>
> .globl foo
> .type foo, @function
> foo:
> shrl $3, %edi
> xorl $1, %edi
> testl %esi, %esi
> sete %al
> orl %eax, %edi
> andl $1, %edi
> movl %edi, %eax
> ret
> .globl moo
> .type moo, @function
> moo:
> shrl $3, %edi
> xorl $1, %edi
> testl %esi, %esi
> sete %al
> orl %eax, %edi
> andl $1, %edi
> movl %edi, %eax
> ret
Indeed, no difference, except for the eye.
do you not consider it an improvement or do you not want to change it?
or
don't you consider it an improvement and want to change it?
Never mind. Disregard if you please.
> - Davide
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
