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TurboPFor: Variable byte encode/decode

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2017-01-15 13:56:26 +01:00
parent 6e9d216a4b
commit 7e3ebcb044
1 changed files with 8 additions and 6 deletions
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14
vint.c
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@ -80,10 +80,12 @@ unsigned char *TEMPLATE2(vbdec, USIZE)(unsigned char *__restrict in, unsigned n
OVERFLOWD(in, n, out, VB_MAX);
#define VBE(_i_) TEMPLATE2(_vbget, USIZE)(in, x, op[_i_] = x)
for(op = out; op != out+(n&~(UN-1)); op += UN) { VBE(0); VBE(1); VBE(2); VBE(3); __builtin_prefetch(in+8*USIZE, 0);
for(op = out; op != out+(n&~(UN-1)); op += UN) {
VBE(0); VBE(1); VBE(2); VBE(3);
#if UN > 4
VBE(4); VBE(5); VBE(6); VBE(7);
#endif
__builtin_prefetch(in+16*USIZE, 0);
}
while(op != out+n)
TEMPLATE2(_vbget, USIZE)(in, x, *op++ = x );
@ -246,14 +248,14 @@ unsigned char *TEMPLATE2(VBDDEC, USIZE)(unsigned char *__restrict in, unsigned n
return in;
}
#endif
#define VBDD { TEMPLATE2(_vbget, USIZE)(in, x, x+=VDELTA); *op++ = (start += x); }
for(op = out; op != out+(n&~(UN-1)); ) {
VBDD; VBDD; VBDD; VBDD;
#define VBDD(i) { TEMPLATE2(_vbget, USIZE)(in, x, x+=VDELTA); op[i] = (start += x); }
for(op = out; op != out+(n&~(UN-1)); op+=UN) {
VBDD(0); VBDD(1); VBDD(2); VBDD(3);
#if UN > 4
VBDD; VBDD; VBDD; VBDD;
VBDD(4); VBDD(5); VBDD(6); VBDD(7);
#endif
}
while(op != out+n) VBDD;
while(op != out+n) VBDD(0);
return in;
}
#undef VBDD