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llama.cpp
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sampling : cleaner approach for constructing floating point value

This commit is contained in:
Jan Boon 2026-02-09 03:27:12 +00:00
parent 7f433763b6
commit ae31b151e9
1 changed files with 4 additions and 7 deletions
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11
src/llama-sampler.cpp
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@ -434,13 +434,10 @@ struct blue_noise_rng {
// uniform double in [0, 1) with blue noise temporal autocorrelation
double nextf() {
double res = 0.0;
res += hash(position ^ ~seed); // fill low bits with white noise
res *= 1.0 / 4294967296.0;
res += next32();
res *= 1.0 / 4294967296.0;
if (res >= 1.0) res = std::nextafter(1.0, 0.0);
return res;
uint32_t lo = hash(position ^ ~seed); // white noise low bits
uint32_t hi = next32(); // blue noise high bits
uint64_t combined = ((uint64_t)hi << 32) | lo;
return (combined >> 11) * 0x1.0p-53;
}
};