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cuda : add BF16 support for XIELU (llama/29955)

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The XIELU CUDA kernel template is already generic over the element
type; only the F32/F16 type assertion and the else-if dispatch were
missing. Add the nv_bfloat16 branch to the launcher, and drop the
temporary supports_op gate in ggml-cuda.cu that rejected BF16+XIELU.

test-backend-ops gains two BF16 cases ([10,5,4,3] and [512,16,1,1]).
docs/ops/CUDA.csv and docs/ops.md are regenerated; the F32 xIELU row
flips from no to yes as well, i.e. the previous record was stale.

Tested:
- Mac CPU: xIELU F32/F16/BF16, 6/6
- Mac Metal: existing F32/F16, 4/4; BF16 still unsupported
- RTX 4090 CUDA: xIELU F32/F16/BF16, 6/6
- RTX 4090 CUDA BF16-only: 2/2
- git diff --check passes
This commit is contained in:
qiao_px
2026-10-19 09:47:10 +02:00
committed by Daniel Bevenius
parent 1ea1089b6b
commit 2d5d68ea29
2 changed files with 4 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
ggml/src/ggml-cuda/ggml-cuda.cu
-3
View File
@@ -5314,9 +5314,6 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
case GGML_UNARY_OP_CEIL:
case GGML_UNARY_OP_ROUND:
case GGML_UNARY_OP_TRUNC:
if (op->src[0]->type == GGML_TYPE_BF16 && ggml_get_unary_op(op) == GGML_UNARY_OP_XIELU) {
return false;
}
// TODO: should become:
//return ggml_is_contiguous_rows(op->src[0]);
return ggml_is_contiguous(op->src[0]);
ggml/src/ggml-cuda/unary.cu
+4 -2
View File
@@ -547,8 +547,8 @@ void ggml_cuda_op_xielu(ggml_backend_cuda_context & ctx, ggml_tensor * dst) {
GGML_ASSERT(ggml_is_contiguous(src0));
GGML_ASSERT(src0->type == GGML_TYPE_F32 || src0->type == GGML_TYPE_F16);
GGML_ASSERT( dst->type == GGML_TYPE_F32 || dst->type == GGML_TYPE_F16);
GGML_ASSERT(src0->type == GGML_TYPE_F32 || src0->type == GGML_TYPE_F16 || src0->type == GGML_TYPE_BF16);
GGML_ASSERT( dst->type == GGML_TYPE_F32 || dst->type == GGML_TYPE_F16 || dst->type == GGML_TYPE_BF16);
GGML_ASSERT(src0->type == dst->type);
const float alpha_n = ggml_get_op_params_f32(dst, 1);
@@ -558,6 +558,8 @@ void ggml_cuda_op_xielu(ggml_backend_cuda_context & ctx, ggml_tensor * dst) {
if (src0->type == GGML_TYPE_F16) {
xielu_cuda((const half *)src0_d, (half *)dst_d, ggml_nelements(src0), alpha_n, alpha_p, beta, eps, stream);
} else if (src0->type == GGML_TYPE_BF16) {
xielu_cuda((const nv_bfloat16 *)src0_d, (nv_bfloat16 *)dst_d, ggml_nelements(src0), alpha_n, alpha_p, beta, eps, stream);
} else {
xielu_cuda((const float *)src0_d, (float *)dst_d, ggml_nelements(src0), alpha_n, alpha_p, beta, eps, stream);
}