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ggml: backward pass for split swiglu (llama/14483)

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Johannes Gäßler
2025-07-03 17:05:18 +02:00
committed by Georgi Gerganov
parent 0ca760433c
commit 4aaf8114e7
1 changed files with 17 additions and 2 deletions
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19
ggml/src/ggml.c
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@ -6042,13 +6042,28 @@ static void ggml_compute_backward(
}
GGML_ASSERT(!src1_needs_grads && "backward pass for labels not implemented");
} break;
case GGML_OP_GLU: {
switch (ggml_get_glu_op(tensor)) {
case GGML_GLU_OP_SWIGLU: {
if (src0_needs_grads) {
GGML_ASSERT(src1 && "backward pass only implemented for split swiglu");
ggml_add_or_set(ctx, cgraph, isrc0, ggml_silu_back(ctx, ggml_mul(ctx, grad, src1), src0));
}
if (src1_needs_grads) {
ggml_add_or_set(ctx, cgraph, isrc1, ggml_mul(ctx, ggml_silu(ctx, src0), grad));
}
} break;
default: {
GGML_ABORT("unsupported glu op for backward pass: %s", ggml_glu_op_name(ggml_get_glu_op(tensor)));
} //break;
}
} break;
case GGML_OP_NONE: {
// noop
} break;
case GGML_OP_COUNT:
default: {
fprintf(stderr, "%s: unsupported ggml op for backward pass: %s\n", __func__, ggml_op_name(tensor->op));
GGML_ABORT("fatal error");
GGML_ABORT("%s: unsupported ggml op for backward pass: %s\n", __func__, ggml_op_name(tensor->op));
} //break;
}