8000 vocab : fix ugm tokenizer precision by CISC · Pull Request #13743 · ggml-org/llama.cpp · GitHub
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vocab : fix ugm tokenizer precision #13743

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May 24, 2025
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vocab : fix ugm tokenizer precision #13743

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8 changes: 4 additions & 4 deletions src/llama-vocab.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -835,7 +835,7 @@ struct llm_tokenizer_ugm_session {
}

// initialize score_sum to -FLT_MAX so it will be always lower than sums of token scores
std::vector<struct best_tokenization> tokenization_results(input_len + 1, {vocab.token_unk(), 0, -FLT_MAX});
std::vector<struct best_tokenization> tokenization_results(input_len + 1, {vocab.token_unk(), 0, -DBL_MAX});
// at the beginning tokenization score is zero
tokenization_results[0] = { vocab.token_unk(), 0, 0 };

Expand Down Expand Up @@ -867,7 +867,7 @@ struct llm_tokenizer_ugm_session {
const double challenger_score = current_best.score_sum + token_score;
struct best_tokenization & current_champ = tokenization_results[prefix_offset];
if (challenger_score > current_champ.score_sum) {
struct best_tokenization challenger = { token_id, input_offset, (float) challenger_score };
struct best_tokenization challenger = { token_id, input_offset, challenger_score };
current_champ = challenger;
}
}
Expand All @@ -881,7 +881,7 @@ struct llm_tokenizer_ugm_session {
prefix_offset = input_offset + n_utf8_code_units;
struct best_tokenization & current_champ = tokenization_results[prefix_offset];
if (challenger_score > current_champ.score_sum) {
struct best_tokenization challenger = { vocab.token_unk(), input_offset, (float) challenger_score };
struct best_tokenization challenger = { vocab.token_unk(), input_offset, challenger_score };
current_champ = challenger;
}
}
Expand Down Expand Up @@ -1007,7 +1007,7 @@ struct llm_tokenizer_ugm_session {
struct best_tokenization {
llama_token token_id;
size_t input_offset;
float score_sum;
double score_sum;
};

struct normalization_result normalize_prefix(const std::string & input, size_t input_offset) {
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