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#include "Rts.h"
#include "MachDeps.h"
StgWord64
hs_pext64(StgWord64 src, StgWord64 mask)
{
uint64_t mk, mp, mv, t;
src = src & mask;
mk = ~mask << 1;
for (int i = 0; i < 6 ; i++) {
mp = mk ^ (mk << 1);
mp = mp ^ (mp << 2);
mp = mp ^ (mp << 4);
mp = mp ^ (mp << 8);
mp = mp ^ (mp << 16);
mp = mp ^ (mp << 32);
mv = mp & mask;
mask = (mask ^ mv) | (mv >> (1 << i));
t = src & mv;
src = (src ^ t) | (t >> (1 << i));
mk = mk & ~mp;
}
return src;
}
StgWord
hs_pext32(StgWord src, StgWord mask)
{
uint32_t mk, mp, mv, t;
src = src & mask;
mk = ~mask << 1;
for (int i = 0; i < 5 ; i++) {
mp = mk ^ (mk << 1);
mp = mp ^ (mp << 2);
mp = mp ^ (mp << 4);
mp = mp ^ (mp << 8);
mp = mp ^ (mp << 16);
mv = mp & mask;
mask = (mask ^ mv) | (mv >> (1 << i));
t = src & mv;
src = (src ^ t) | (t >> (1 << i));
mk = mk & ~mp;
}
return src;
}
StgWord
hs_pext16(StgWord src, StgWord mask)
{
uint16_t mk, mp, mv, t;
src = src & mask;
mk = ~mask << 1;
for (int i = 0; i < 4 ; i++) {
mp = mk ^ (mk << 1);
mp = mp ^ (mp << 2);
mp = mp ^ (mp << 4);
mp = mp ^ (mp << 8);
mv = mp & mask;
mask = (mask ^ mv) | (mv >> (1 << i));
t = src & mv;
src = (src ^ t) | (t >> (1 << i));
mk = mk & ~mp;
}
return src;
}
StgWord
hs_pext8(StgWord src, StgWord mask)
{
uint8_t mk, mp, mv, t;
src = src & mask;
mk = ~mask << 1;
for (int i = 0; i < 3 ; i++) {
mp = mk ^ (mk << 1);
mp = mp ^ (mp << 2);
mp = mp ^ (mp << 4);
mv = mp & mask;
mask = (mask ^ mv) | (mv >> (1 << i));
t = src & mv;
src = (src ^ t) | (t >> (1 << i));
mk = mk & ~mp;
}
return src;
}
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