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Use existing helper function to implement popcntd instruction 

The recent patches adding partial support for POWER7 cpu emulation included
implementing the popcntd instruction.  The support for this was open coded,
but host-utils.h already included a function implementing an equivalent
population count function, which uses a gcc builtin (which can use special
host instructions) if available.

This patch makes the popcntd implementation use the existing, potentially
faster, implementation.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
master
David Gibson 2011-04-05 15:12:11 +10:00 committed by Alexander Graf
parent a3467baa88
commit 3601ff1173
1 changed files with 1 additions and 13 deletions
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14
target-ppc/op_helper.c
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@ -528,19 +528,7 @@ target_ulong helper_popcntw (target_ulong val)
target_ulong helper_popcntd (target_ulong val)
{
val = (val & 0x5555555555555555ULL) + ((val >> 1) &
0x5555555555555555ULL);
val = (val & 0x3333333333333333ULL) + ((val >> 2) &
0x3333333333333333ULL);
val = (val & 0x0f0f0f0f0f0f0f0fULL) + ((val >> 4) &
0x0f0f0f0f0f0f0f0fULL);
val = (val & 0x00ff00ff00ff00ffULL) + ((val >> 8) &
0x00ff00ff00ff00ffULL);
val = (val & 0x0000ffff0000ffffULL) + ((val >> 16) &
0x0000ffff0000ffffULL);
val = (val & 0x00000000ffffffffULL) + ((val >> 32) &
0x00000000ffffffffULL);
return val;
return ctpop64(val);
}
#else
target_ulong helper_popcntb (target_ulong val)