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llama : extend llm_build_ffn() to support _scale tensors (#8103)
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parent
9b2f16f805
commit
494165f3b6
233
llama.cpp
233
llama.cpp
@ -7212,10 +7212,13 @@ static struct ggml_tensor * llm_build_ffn(
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struct ggml_tensor * cur,
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struct ggml_tensor * up,
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struct ggml_tensor * up_b,
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struct ggml_tensor * up_s,
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struct ggml_tensor * gate,
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struct ggml_tensor * gate_b,
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struct ggml_tensor * gate_s,
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struct ggml_tensor * down,
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struct ggml_tensor * down_b,
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struct ggml_tensor * down_s,
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struct ggml_tensor * act_scales,
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llm_ffn_op_type type_op,
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llm_ffn_gate_type type_gate,
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@ -7229,6 +7232,11 @@ static struct ggml_tensor * llm_build_ffn(
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cb(tmp, "ffn_up_b", il);
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}
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if (up_s) {
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tmp = ggml_mul(ctx, tmp, up_s);
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cb(tmp, "ffn_up_s", il);
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}
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if (gate) {
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switch (type_gate) {
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case LLM_FFN_SEQ:
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@ -7247,6 +7255,12 @@ static struct ggml_tensor * llm_build_ffn(
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cur = ggml_add(ctx, cur, gate_b);
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cb(cur, "ffn_gate_b", il);
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}
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if (gate_s) {
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cur = ggml_mul(ctx, cur, gate_s);
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cb(cur, "ffn_gate_s", il);
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}
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} else {
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cur = tmp;
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}
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@ -7286,7 +7300,10 @@ static struct ggml_tensor * llm_build_ffn(
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cb(cur, "ffn_gate_par", il);
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}
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if (down) {
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cur = ggml_mul_mat(ctx, down, cur);
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}
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if (down_b) {
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cb(cur, "ffn_down", il);
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}
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@ -7295,6 +7312,11 @@ static struct ggml_tensor * llm_build_ffn(
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cur = ggml_add(ctx, cur, down_b);
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}
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if (down_s) {
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cur = ggml_mul(ctx, cur, down_s);
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cb(cur, "ffn_down_s", il);
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}
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return cur;
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}
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@ -8003,9 +8025,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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model.layers[il].ffn_gate, model.layers[il].ffn_gate_b,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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model.layers[il].ffn_gate, model.layers[il].ffn_gate_b, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -8137,9 +8159,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -8242,9 +8264,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -8358,9 +8380,9 @@ struct llm_build_context {
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// feed forward
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{
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cur = llm_build_ffn(ctx0, attn_norm, // !! use the attn norm, not the result
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model.layers[il].ffn_up, NULL,
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NULL, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(cur, "ffn_out", il);
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@ -8749,9 +8771,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(cur, "ffn_out", il);
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@ -8841,9 +8863,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -9026,23 +9048,23 @@ struct llm_build_context {
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// feed-forward network
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if (model.arch == LLM_ARCH_BERT) {
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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} else if (model.arch == LLM_ARCH_JINA_BERT_V2) {
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_PAR, cb, il);
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} else {
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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}
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@ -9138,9 +9160,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(cur, "ffn_out", il);
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@ -9276,9 +9298,9 @@ struct llm_build_context {
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LLM_NORM, cb, il);
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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model.layers[il].ffn_act,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(cur, "ffn_out", il);
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@ -9425,9 +9447,9 @@ struct llm_build_context {
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cur = inpSA;
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}
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -9538,9 +9560,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -9651,9 +9673,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -9788,9 +9810,9 @@ struct llm_build_context {
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cb(cur_gate, "ffn_shexp_gate", il);
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ggml_tensor * cur_ffn = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up_shexp, NULL,
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model.layers[il].ffn_gate_shexp, NULL,
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model.layers[il].ffn_down_shexp, NULL,
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model.layers[il].ffn_up_shexp, NULL, NULL,
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model.layers[il].ffn_gate_shexp, NULL, NULL,
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model.layers[il].ffn_down_shexp, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur_ffn, "ffn_shexp", il);
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@ -9917,9 +9939,9 @@ struct llm_build_context {
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// FF
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{
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ffn_output = llm_build_ffn(ctx0, attn_norm_output,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(ffn_output, "ffn_out", il);
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@ -10155,9 +10177,9 @@ struct llm_build_context {
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// feed-forward network
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{
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -10263,9 +10285,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(cur, "ffn_out", il);
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@ -10374,9 +10396,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(cur, "ffn_out", il);
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@ -10491,9 +10513,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -10609,9 +10631,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -10746,9 +10768,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -10863,9 +10885,9 @@ struct llm_build_context {
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// feed-forward network
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{
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, NULL,
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model.layers[il].ffn_gate, NULL,
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model.layers[il].ffn_down, NULL,
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model.layers[il].ffn_up, NULL, NULL,
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model.layers[il].ffn_gate, NULL, NULL,
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model.layers[il].ffn_down, NULL, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_PAR, cb, il);
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cb(cur, "ffn_out", il);
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@ -10983,9 +11005,9 @@ struct llm_build_context {
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cb(cur, "ffn_norm", il);
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cur = llm_build_ffn(ctx0, cur,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b,
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NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b,
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model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
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NULL, NULL, NULL,
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model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
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NULL,
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LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
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cb(cur, "ffn_out", il);
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@ -11271,9 +11293,9 @@ struct llm_build_context {
|
||||
// feed-forward network
|
||||
{
|
||||
cur = llm_build_ffn(ctx0, ffn_inp,
|
||||
model.layers[il].ffn_up, NULL,
|
||||
model.layers[il].ffn_gate, NULL,
|
||||
model.layers[il].ffn_down, NULL,
|
||||
model.layers[il].ffn_up, NULL, NULL,
|
||||
model.layers[il].ffn_gate, NULL, NULL,
|
||||
model.layers[il].ffn_down, NULL, NULL,
|
||||
NULL,
|
||||
LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
|
||||
cb(cur, "ffn_out", il);
|
||||
@ -11408,9 +11430,9 @@ struct llm_build_context {
|
||||
cb(cur, "ffn_norm", il);
|
||||
|
||||
cur = llm_build_ffn(ctx0, cur,
|
||||
model.layers[il].ffn_up, NULL,
|
||||
model.layers[il].ffn_gate, NULL,
|
||||
model.layers[il].ffn_down, NULL,
|
||||
model.layers[il].ffn_up, NULL, NULL,
|
||||
model.layers[il].ffn_gate, NULL, NULL,
|
||||
model.layers[il].ffn_down, NULL, NULL,
|
||||
NULL,
|
||||
LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
|
||||
cb(cur, "ffn_out", il);
|
||||
@ -11522,9 +11544,9 @@ struct llm_build_context {
|
||||
cb(cur, "ffn_norm", il);
|
||||
|
||||
cur = llm_build_ffn(ctx0, cur,
|
||||
model.layers[il].ffn_up, model.layers[il].ffn_up_b,
|
||||
NULL, NULL,
|
||||
model.layers[il].ffn_down, model.layers[il].ffn_down_b,
|
||||
model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
|
||||
NULL, NULL, NULL,
|
||||
model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
|
||||
NULL,
|
||||
LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
|
||||
cb(cur, "ffn_out", il);
|
||||
@ -11553,9 +11575,9 @@ struct llm_build_context {
|
||||
cb(cur, "ffn_norm", il);
|
||||
|
||||
cur = llm_build_ffn(ctx0, cur,
|
||||
model.layers[il].ffn_up, model.layers[il].ffn_up_b,
|
||||
NULL, NULL,
|
||||
model.layers[il].ffn_down, model.layers[il].ffn_down_b,
|
||||
model.layers[il].ffn_up, model.layers[il].ffn_up_b, NULL,
|
||||
NULL, NULL, NULL,
|
||||
model.layers[il].ffn_down, model.layers[il].ffn_down_b, NULL,
|
||||
NULL,
|
||||
LLM_FFN_GELU, LLM_FFN_SEQ, cb, il);
|
||||
cb(cur, "ffn_out", il);
|
||||
@ -11662,9 +11684,9 @@ struct llm_build_context {
|
||||
cb(cur, "ffn_norm", il);
|
||||
|
||||
cur = llm_build_ffn(ctx0, cur,
|
||||
model.layers[il].ffn_up, NULL,
|
||||
model.layers[il].ffn_gate, NULL,
|
||||
model.layers[il].ffn_down, NULL,
|
||||
model.layers[il].ffn_up, NULL, NULL,
|
||||
model.layers[il].ffn_gate, NULL, NULL,
|
||||
model.layers[il].ffn_down, NULL, NULL,
|
||||
NULL,
|
||||
LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
|
||||
cb(cur, "ffn_out", il);
|
||||
@ -11884,9 +11906,9 @@ struct llm_build_context {
|
||||
cb(cur, "ffn_norm", il);
|
||||
|
||||
cur = llm_build_ffn(ctx0, cur,
|
||||
model.layers[il].ffn_up, NULL,
|
||||
model.layers[il].ffn_gate, NULL,
|
||||
model.layers[il].ffn_down, NULL,
|
||||
model.layers[il].ffn_up, NULL, NULL,
|
||||
model.layers[il].ffn_gate, NULL, NULL,
|
||||
model.layers[il].ffn_down, NULL, NULL,
|
||||
NULL,
|
||||
LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
|
||||
cb(cur, "ffn_out", il);
|
||||
@ -11912,9 +11934,9 @@ struct llm_build_context {
|
||||
// FFN shared expert
|
||||
{
|
||||
ggml_tensor * ffn_shexp = llm_build_ffn(ctx0, cur,
|
||||
model.layers[il].ffn_up_shexp, NULL,
|
||||
model.layers[il].ffn_gate_shexp, NULL,
|
||||
model.layers[il].ffn_down_shexp, NULL,
|
||||
model.layers[il].ffn_up_shexp, NULL, NULL,
|
||||
model.layers[il].ffn_gate_shexp, NULL, NULL,
|
||||
model.layers[il].ffn_down_shexp, NULL, NULL,
|
||||
NULL,
|
||||
LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
|
||||
cb(ffn_shexp, "ffn_shexp", il);
|
||||
@ -12017,7 +12039,7 @@ struct llm_build_context {
|
||||
cb(Kcur, "Kcur", il);
|
||||
|
||||
cur = llm_build_kv(ctx0, model, hparams, cparams, kv_self, gf,
|
||||
nullptr, nullptr,
|
||||
NULL, NULL,
|
||||
Kcur, Vcur, Qcur, KQ_mask, n_tokens, kv_head, n_kv, 1.0f/sqrtf(float(n_embd_head)), cb, il);
|
||||
|
||||
cur = llm_build_norm(ctx0, cur, hparams,
|
||||
@ -12044,25 +12066,18 @@ struct llm_build_context {
|
||||
cb(ffn_inp, "ffn_inp", il);
|
||||
|
||||
// feed-forward forward
|
||||
if (model.layers[il].ffn_gate_inp == nullptr) {
|
||||
cur = llm_build_norm(ctx0, ffn_inp, hparams,
|
||||
model.layers[il].ffn_norm, NULL,
|
||||
LLM_NORM_RMS, cb, il);
|
||||
cb(cur, "ffn_norm", il);
|
||||
|
||||
struct ggml_tensor *tmp = ggml_mul_mat(ctx0, model.layers[il].ffn_up, cur);
|
||||
tmp = ggml_mul(ctx0, tmp, model.layers[il].ffn_up_scale);
|
||||
cb(tmp, "ffn_up", il);
|
||||
|
||||
cur = ggml_mul_mat(ctx0, model.layers[il].ffn_gate, cur);
|
||||
cur = ggml_mul(ctx0, cur, model.layers[il].ffn_gate_scale);
|
||||
cb(cur, "ffn_gate", il);
|
||||
|
||||
cur = ggml_silu(ctx0, cur);
|
||||
cb(cur, "ffn_silu", il);
|
||||
|
||||
cur = ggml_mul(ctx0, cur, tmp);
|
||||
cb(cur, "ffn_gate_par", il);
|
||||
cur = llm_build_ffn(ctx0, cur,
|
||||
model.layers[il].ffn_up, NULL, model.layers[il].ffn_up_scale,
|
||||
model.layers[il].ffn_gate, NULL, model.layers[il].ffn_gate_scale,
|
||||
NULL, NULL, NULL,
|
||||
NULL,
|
||||
LLM_FFN_SILU, LLM_FFN_PAR, cb, il);
|
||||
cb(cur, "ffn_sub_out", il);
|
||||
|
||||
cur = llm_build_norm(ctx0, cur, hparams,
|
||||
model.layers[il].ffn_sub_norm, NULL,
|
||||
@ -12072,7 +12087,7 @@ struct llm_build_context {
|
||||
cur = ggml_mul_mat(ctx0, model.layers[il].ffn_down, cur);
|
||||
cur = ggml_mul(ctx0, cur, model.layers[il].ffn_down_scale);
|
||||
cb(cur, "ffn_down", il);
|
||||
}
|
||||
|
||||
cur = ggml_add(ctx0, cur, ffn_inp);
|
||||
cb(cur, "l_out", il);
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user