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BitUtil: Delta, ZigZag, NumBits, Floating Point,...

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powturbo
2015-06-28 13:24:56 +02:00
parent ea146a6ed1
commit d1d7e68c20
1 changed files with 34 additions and 0 deletions
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34
bitutil.c
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@ -254,3 +254,37 @@ unsigned bitzigzag64(unsigned *in, unsigned n, unsigned *out, unsigned start) {
void bitunzigzag64(unsigned *p, unsigned n, unsigned start) {
BITUNZIGZAG(p, n, start);
}
//------------------- De-/Compose Floating Point -----------------------------------------
void bitdouble(double *in, unsigned n, unsigned *sgn, unsigned *expo, uint64_t *mant) {
double *ip;
uint64_t u;
for(ip = in; ip < in+n; ip++) {
u = *(uint64_t *)ip; BITFLOAT(u, *sgn++, *expo++, *mant++, DMANT_BITS, 1ull);
}
}
void bitundouble(unsigned *sgn, unsigned *expo, uint64_t *mant, unsigned n, double *out) {
double *op;
uint64_t u;
for(op = out; op < out+n; op++) {
BITUNFLOAT((uint64_t)(*sgn++), (uint64_t)(*expo++), *mant++, u, DMANT_BITS); *op = *(double *)&u;
}
}
void bitfloat(float *in, unsigned n, unsigned *sgn, unsigned *expo, unsigned *mant) {
float *ip;
unsigned u;
for(ip = in; ip < in+n; ip++) {
u = *(unsigned *)ip; BITFLOAT(u, *sgn++, *expo++, *mant++, FMANT_BITS, 1u);
}
}
void bitunfloat(unsigned *sgn, unsigned *expo, unsigned *mant, unsigned n, float *out) {
float *op;
unsigned u;
for(op = out; op < out+n; op++) {
BITUNFLOAT((*sgn++), (*expo++), *mant++, u, FMANT_BITS); *op = *(float *)&u;
}
}