daiduo/TurboPFor-Integer-Compression
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

TurboPFor: TurboPFor decode

Browse Source
This commit is contained in:
x
2017-02-26 14:22:11 +01:00
parent 203081940f
commit 3afddc6f87
1 changed files with 19 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
vp4d.c
View File

@ -253,12 +253,14 @@ static ALIGNED(char, shuffles[16][16], 16) = {
#pragma GCC optimize ("align-functions=16")
ALWAYS_INLINE unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out P4DELTA(uint_t start), unsigned b, unsigned bx ) {
uint_t ex[P4D_MAX+8];
uint_t ex[P4D_MAX+32];
#if USIZE == 64
b = ((b>>1)==63)?(64<<1):b;
#endif
if(!(b & 1))
return TEMPLATE2(BITUNPACKD, USIZE)(in, n, out P4DELTA(start), b>>1);
b >>= 1;
#ifdef VSIZE
#if defined(VSIZE) && USIZE < 64
unsigned char *pb = in;
#if VSIZE == 128
in = TEMPLATE2(bitunpack, USIZE)(in+16, popcnt64(ctou64(in)) + popcnt64(ctou64(in+8)), ex, bx);
@ -267,7 +269,8 @@ ALWAYS_INLINE unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict
#endif
return TEMPLATE2(_BITUNPACKD, USIZE)(in, n, out P4DELTA(start), b, ex, pb);
#else
unsigned long long bb[P4D_MAX/64]; unsigned num=0,i,p4dn = (n+63)/64;
unsigned long long bb[P4D_MAX/64];
unsigned num=0,i,p4dn = (n+63)/64;
for(i = 0; i < n/64; i++) { bb[i] = ctou64(in+i*8); num += popcnt64(bb[i]); }
if(n & 0x3f) { bb[i] = ctou64(in+i*8) & ((1ull<<(n&0x3f))-1); num += popcnt64(bb[i]); }
in = TEMPLATE2(bitunpack, USIZE)(in+PAD8(n), num, ex, bx);
@ -287,10 +290,10 @@ ALWAYS_INLINE unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict
} _op+=64;
}
#else
unsigned k = 0; uint_t *_op=out,*op;
for(op=_op,i = 0; i < p4dn; i++) {
while(bb[i]) { unsigned x = ctz64(bb[i]); op[x] += ex[k++]<<b; bb[i] ^= (1ull<<x); } _op += 8;
}
unsigned k = 0;
uint_t *op;
for(op=out,i = 0; i < p4dn; i++,op += 64)
while(bb[i]) { unsigned x = ctz64(bb[i]); op[x] += ex[k++]<<b; bb[i] ^= (1ull<<x); }
#endif
#ifdef BITUNDD
TEMPLATE2(BITUNDD, USIZE)(out, n, start);
@ -300,18 +303,18 @@ ALWAYS_INLINE unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict
}
unsigned char *TEMPLATE2(P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out P4DELTA(uint_t start) ) { if(!n) return in;
unsigned b = *in++,bx,i;
unsigned b = *in++, bx, i;
if(likely(!(b & 0x80))) {
if(b & 1)
bx = *in++;
return TEMPLATE2(_P4DEC, USIZE)(in, n, out P4DELTA(start), b, bx );
return TEMPLATE2(_P4DEC, USIZE)(in, n, out P4DELTA(start), b, bx);
}
#if USIZE > 8
else {
uint_t ex[P4D_MAX+8];
uint_t ex[P4D_MAX+32];
b = (b & 0x7f)>>1;
bx = *in++;
in = TEMPLATE2(BITUNPACK, USIZE)(in, n, out, b);
in = TEMPLATE2(vbdec, USIZE)(in, bx, ex);
for(i = 0; i != (bx & ~7); i += 8) {