Le vendredi 05 septembre 2014 à 13:35 +0200, Andreas Tille a écrit :
> Hi,
>
> On Mon, Aug 04, 2014 at 12:58:42PM +0100, Wookey wrote:
> > +++ Andreas Tille [2014-08-04 09:48 +0200]:
>
> ebwt.h:1909: Error: invalid instruction suffix for `popcnt'
> make[2]: *** [bowtie-build] Error 1
>
> The relevant line in the code is:
>
> $ grep -w -n asm e*
> ebwt.h:1909: asm ("popcntq %[x],%[count]\n": [count] "=&r"
> (count): [x] "r" (x));
A quick search shows this instruction is supported by -msse4.2 switch,
which is probably not enabled on debian i386 arch.
Another quick search show how to switch to popcnt (without q):
({ __cpu_mask r; \
- asm ("popcntq %1, %0" : "=r" (r) : "0" (l));\
+ asm ("popcnt %1, %0" : "=r" (r) : "0" (l));\
r; })
Jérémy.
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