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llama : Support llama 4 text-only (#12791)

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* llama4 conversion

* initial support, no chat template

* clean up a bit

* fix tokenizer conversion

* correct hparams

* try this

* fix shexp

* ffn_inp_normed

* chat template

* clean up model conversion

* add_bos

* add scale_before_ffn

* fix order

* weight_before_ffn

* llm_graph_input_attn_temp

* add chunk attn mask

* build_inp_attn_scale()

* add comment about ggml_repeat

* clarify comments

* fix build
This commit is contained in:
Xuan-Son Nguyen
2025-04-07 23:06:44 +02:00
committed by GitHub
parent 82974011f3
commit 1466621e73
17 changed files with 532 additions and 22 deletions
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14
src/llama-chat.cpp
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@ -61,6 +61,7 @@ static const std::map<std::string, llm_chat_template> LLM_CHAT_TEMPLATES = {
{ "megrez", LLM_CHAT_TEMPLATE_MEGREZ },
{ "yandex", LLM_CHAT_TEMPLATE_YANDEX },
{ "bailing", LLM_CHAT_TEMPLATE_BAILING },
{ "llama4", LLM_CHAT_TEMPLATE_LLAMA4 },
};
llm_chat_template llm_chat_template_from_str(const std::string & name) {
@ -174,6 +175,8 @@ llm_chat_template llm_chat_detect_template(const std::string & tmpl) {
return LLM_CHAT_TEMPLATE_YANDEX;
} else if (tmpl_contains("<role>ASSISTANT</role>") && tmpl_contains("'HUMAN'")) {
return LLM_CHAT_TEMPLATE_BAILING;
} else if (tmpl_contains("<|header_start|>") && tmpl_contains("<|header_end|>")) {
return LLM_CHAT_TEMPLATE_LLAMA4;
}
return LLM_CHAT_TEMPLATE_UNKNOWN;
}
@ -608,7 +611,16 @@ int32_t llm_chat_apply_template(
if (add_ass) {
ss << "<role>ASSISTANT</role>";
}
} else {
} else if (tmpl == LLM_CHAT_TEMPLATE_LLAMA4) {
// Llama 4
for (auto message : chat) {
std::string role(message->role);
ss << "<|header_start|>" << role << "<|header_end|>\n\n" << trim(message->content) << "<|eot|>";
}
if (add_ass) {
ss << "<|header_start|>assistant<|header_end|>\n\n";
}
} else {
// template not supported
return -1;
}