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llama: Add option to merge gate and exp weights #19139

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3c264fa
llama: Add option to merge gate and exp weights
am17an Jan 10, 2026
d379334
Update convert_hf_to_gguf.py
am17an Jan 27, 2026
d29e8d1
Update convert_hf_to_gguf.py
am17an Jan 27, 2026
93c09b0
update constants.py
am17an Jan 27, 2026
d527830
add gate_up for the all MoE models
am17an Jan 28, 2026
566884c
convert: simplify merge tensor condition
am17an Jan 28, 2026
362bff9
update constants.py
am17an Jan 28, 2026
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41 changes: 37 additions & 4 deletions convert_hf_to_gguf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -116,7 +116,8 @@ def __init__(self, dir_model: Path, ftype: gguf.LlamaFileType, fname_out: Path,
split_max_tensors: int = 0, split_max_size: int = 0, dry_run: bool = False,
small_first_shard: bool = False, hparams: dict[str, Any] | None = None, remote_hf_model_id: str | None = None,
disable_mistral_community_chat_template: bool = False,
sentence_transformers_dense_modules: bool = False):
sentence_transformers_dense_modules: bool = False,
fuse_gate_up_exps: bool = False):
if type(self) is ModelBase or \
type(self) is TextModel or \
type(self) is MmprojModel:
Expand All @@ -135,6 +136,9 @@ def __init__(self, dir_model: Path, ftype: gguf.LlamaFileType, fname_out: Path,
self.dry_run = dry_run
self.remote_hf_model_id = remote_hf_model_id
self.sentence_transformers_dense_modules = sentence_transformers_dense_modules
self.fuse_gate_up_exps = fuse_gate_up_exps
self._gate_exp_buffer: dict[int, Tensor] = {}
self._up_exp_buffer: dict[int, Tensor] = {}
self.hparams = ModelBase.load_hparams(self.dir_model, self.is_mistral_format) if hparams is None else hparams
self.model_tensors = self.index_tensors(remote_hf_model_id=remote_hf_model_id)
self.metadata_override = metadata_override
Expand Down Expand Up @@ -514,8 +518,31 @@ def set_gguf_parameters(self):
raise NotImplementedError("set_gguf_parameters() must be implemented in subclasses")

def modify_tensors(self, data_torch: Tensor, name: str, bid: int | None) -> Iterable[tuple[str, Tensor]]:
del bid # unused
return [(self.map_tensor_name(name), data_torch)]
new_name = self.map_tensor_name(name)

# Handle gate/up expert tensor fusion if enabled
if self.fuse_gate_up_exps and bid is not None:
if self.match_model_tensor_name(new_name, gguf.MODEL_TENSOR.FFN_GATE_EXP, bid):
self._gate_exp_buffer[bid] = data_torch
elif self.match_model_tensor_name(new_name, gguf.MODEL_TENSOR.FFN_UP_EXP, bid):
self._up_exp_buffer[bid] = data_torch

# Check if both gate and up are buffered for this layer
if bid in self._gate_exp_buffer and bid in self._up_exp_buffer:
gate_data = self._gate_exp_buffer.pop(bid)
up_data = self._up_exp_buffer.pop(bid)
# gate/up shape: (n_expert, n_ff, n_embd), concatenate to (n_expert, n_ff*2, n_embd)
fused_data = torch.cat([gate_data, up_data], dim=1)
fused_name = self.format_tensor_name(gguf.MODEL_TENSOR.FFN_GATE_UP_EXP, bid)
logger.info(f"Fused gate_exps and up_exps for layer {bid}")
return [(fused_name, fused_data)]

# If we buffered a gate/up tensor, wait for the other
if self.match_model_tensor_name(new_name, gguf.MODEL_TENSOR.FFN_GATE_EXP, bid) or \
self.match_model_tensor_name(new_name, gguf.MODEL_TENSOR.FFN_UP_EXP, bid):
return []

return [(new_name, data_torch)]

def tensor_force_quant(self, name: str, new_name: str, bid: int | None, n_dims: int) -> gguf.GGMLQuantizationType | bool:
del name, new_name, bid, n_dims # unused
Expand Down Expand Up @@ -11121,6 +11148,11 @@ def parse_args() -> argparse.Namespace:
"Default these modules are not included.")
)

parser.add_argument(
"--fuse-gate-up-exps", action="store_true",
help="Fuse gate_exps and up_exps tensors into a single gate_up_exps tensor for MoE models.",
)

args = parser.parse_args()
if not args.print_supported_models and args.model is None:
parser.error("the following arguments are required: model")
Expand Down Expand Up @@ -11258,7 +11290,8 @@ def main() -> None:
split_max_size=split_str_to_n_bytes(args.split_max_size), dry_run=args.dry_run,
small_first_shard=args.no_tensor_first_split,
remote_hf_model_id=hf_repo_id, disable_mistral_community_chat_template=disable_mistral_community_chat_template,
sentence_transformers_dense_modules=args.sentence_transformers_dense_modules
sentence_transformers_dense_modules=args.sentence_transformers_dense_modules,
fuse_gate_up_exps=args.fuse_gate_up_exps
)

if args.vocab_only:
Expand Down
38 changes: 38 additions & 0 deletions gguf-py/gguf/constants.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -511,6 +511,7 @@ class MODEL_TENSOR(IntEnum):
FFN_GATE_EXP = auto()
FFN_DOWN_EXP = auto()
FFN_UP_EXP = auto()
FFN_GATE_UP_EXP = auto()
FFN_GATE_SHEXP = auto()
FFN_DOWN_SHEXP = auto()
FFN_UP_SHEXP = auto()
Expand Down Expand Up @@ -937,6 +938,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP: "blk.{bid}.ffn_gate_exps",
MODEL_TENSOR.FFN_DOWN_EXP: "blk.{bid}.ffn_down_exps",
MODEL_TENSOR.FFN_UP_EXP: "blk.{bid}.ffn_up_exps",
MODEL_TENSOR.FFN_GATE_UP_EXP: "blk.{bid}.ffn_gate_up_exps",
MODEL_TENSOR.FFN_EXP_PROBS_B: "blk.{bid}.exp_probs_b",
MODEL_TENSOR.LAYER_OUT_NORM: "blk.{bid}.layer_output_norm",
MODEL_TENSOR.PER_LAYER_TOKEN_EMBD: "per_layer_token_embd", # gemma3n
Expand Down Expand Up @@ -1311,6 +1313,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.LLAMA4: [
MODEL_TENSOR.TOKEN_EMBD,
Expand All @@ -1331,6 +1334,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand All @@ -1354,6 +1358,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.GROK: [
MODEL_TENSOR.TOKEN_EMBD,
Expand All @@ -1375,6 +1380,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_POST_NORM,
MODEL_TENSOR.LAYER_OUT_NORM,
],
Expand Down Expand Up @@ -1688,6 +1694,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_INP_SHEXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
Expand Down Expand Up @@ -1726,6 +1733,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.QWEN3NEXT: [
MODEL_TENSOR.TOKEN_EMBD,
Expand All @@ -1749,6 +1757,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.SSM_A,
MODEL_TENSOR.SSM_CONV1D,
MODEL_TENSOR.SSM_DT,
Expand Down Expand Up @@ -1790,6 +1799,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.PLAMO: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -1910,6 +1920,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.CODESHELL: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -1976,6 +1987,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.MINICPM3: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -2288,6 +2300,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.XVERSE: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -2343,6 +2356,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.OLMO: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -2401,6 +2415,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.OPENELM: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -2435,6 +2450,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.DEEPSEEK: [
MODEL_TENSOR.TOKEN_EMBD,
Expand All @@ -2455,6 +2471,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand All @@ -2481,6 +2498,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE,
MODEL_TENSOR.FFN_DOWN,
MODEL_TENSOR.FFN_UP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
Expand All @@ -2506,6 +2524,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand Down Expand Up @@ -2576,6 +2595,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand Down Expand Up @@ -2776,6 +2796,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand Down Expand Up @@ -2816,6 +2837,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
Expand All @@ -2842,6 +2864,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
Expand Down Expand Up @@ -2903,6 +2926,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand All @@ -2925,6 +2949,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand Down Expand Up @@ -2959,6 +2984,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_UP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_UP_SHEXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.ARCEE: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -2995,6 +3021,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
Expand Down Expand Up @@ -3067,6 +3094,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_SHEXP,
MODEL_TENSOR.FFN_DOWN_SHEXP,
MODEL_TENSOR.FFN_UP_SHEXP,
Expand Down Expand Up @@ -3115,6 +3143,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.ATTN_OUT,
MODEL_TENSOR.ATTN_SINKS,
MODEL_TENSOR.FFN_GATE_INP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
Expand Down Expand Up @@ -3160,6 +3189,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_EXP_PROBS_B,
],
MODEL_ARCH.SMALLTHINKER: [
Expand All @@ -3179,6 +3209,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.APERTUS: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -3214,6 +3245,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.GROVEMOE: [
MODEL_TENSOR.TOKEN_EMBD,
Expand All @@ -3231,6 +3263,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_GATE_CHEXP,
MODEL_TENSOR.FFN_DOWN_CHEXP,
MODEL_TENSOR.FFN_UP_CHEXP,
Expand All @@ -3251,6 +3284,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_EXP_PROBS_B,
],
MODEL_ARCH.COGVLM: [
Expand Down Expand Up @@ -3286,6 +3320,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.PANGU_EMBED: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down Expand Up @@ -3320,6 +3355,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.MIMO2: [
MODEL_TENSOR.TOKEN_EMBD,
Expand All @@ -3339,6 +3375,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
MODEL_TENSOR.FFN_EXP_PROBS_B,
],
MODEL_ARCH.LLAMA_EMBED: [
Expand All @@ -3360,6 +3397,7 @@ class MODEL_TENSOR(IntEnum):
MODEL_TENSOR.FFN_GATE_EXP,
MODEL_TENSOR.FFN_DOWN_EXP,
MODEL_TENSOR.FFN_UP_EXP,
MODEL_TENSOR.FFN_GATE_UP_EXP,
],
MODEL_ARCH.MAINCODER: [
MODEL_TENSOR.TOKEN_EMBD,
Expand Down
4 changes: 4 additions & 0 deletions gguf-py/gguf/tensor_mapping.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -555,6 +555,10 @@ class TensorNameMap:
"model.layers.{bid}.mlp.chunk_experts.gate_proj", # grovemoe
),

MODEL_TENSOR.FFN_GATE_UP_EXP: (
"model.layers.{bid}.mlp.experts.gate_up_proj", # gpt-oss
),

# Feed-forward down
MODEL_TENSOR.FFN_DOWN: (
"gpt_neox.layers.{bid}.mlp.dense_4h_to_h", # gptneox
Expand Down
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