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llama.cpp
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opencl: add SOFTPLUS op support (#18726)

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shaofeiqi 2026-01-10 21:57:44 -08:00 committed by GitHub
parent b137718878
commit 707cbafcaa
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3 changed files with 227 additions and 0 deletions
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1
ggml/src/ggml-opencl/CMakeLists.txt
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@ -122,6 +122,7 @@ set(GGML_OPENCL_KERNELS
upscale
tanh
expm1
softplus
pad
repeat
mul_mat_f16_f32

138
ggml/src/ggml-opencl/ggml-opencl.cpp
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@ -540,6 +540,8 @@ struct ggml_backend_opencl_context {
cl_kernel kernel_tanh_f16_nd;
cl_kernel kernel_expm1_f32_nd;
cl_kernel kernel_expm1_f16_nd;
cl_kernel kernel_softplus_f32_nd;
cl_kernel kernel_softplus_f16_nd;
cl_kernel kernel_upscale;
cl_kernel kernel_upscale_bilinear;
cl_kernel kernel_concat_f32_contiguous;
@ -1826,6 +1828,31 @@ static void load_cl_kernels(ggml_backend_opencl_context *backend_ctx, ggml_cl_ve
CL_CHECK(clReleaseProgram(prog));
}
// softplus
{
#ifdef GGML_OPENCL_EMBED_KERNELS
const std::string kernel_src {
#include "softplus.cl.h"
};
#else
const std::string kernel_src = read_file("softplus.cl");
#endif
cl_program prog;
if (!kernel_src.empty()) {
prog =
build_program_from_source(backend_ctx->context, backend_ctx->device, kernel_src.c_str(), compile_opts);
CL_CHECK((backend_ctx->kernel_softplus_f32_nd = clCreateKernel(prog, "kernel_softplus_f32_nd", &err), err));
CL_CHECK((backend_ctx->kernel_softplus_f16_nd = clCreateKernel(prog, "kernel_softplus_f16_nd", &err), err));
GGML_LOG_CONT(".");
} else {
GGML_LOG_WARN("ggml_opencl: softplus kernel source not found or empty. Softplus operation will not be available.\n");
prog = nullptr;
backend_ctx->kernel_softplus_f32_nd = nullptr;
backend_ctx->kernel_softplus_f16_nd = nullptr;
}
CL_CHECK(clReleaseProgram(prog));
}
// upscale
{
#ifdef GGML_OPENCL_EMBED_KERNELS
@ -3138,6 +3165,9 @@ static bool ggml_opencl_supports_op(ggml_backend_dev_t dev, const struct ggml_te
case GGML_UNARY_OP_EXPM1:
return (op->src[0]->type == GGML_TYPE_F32 && op->type == GGML_TYPE_F32) ||
(op->src[0]->type == GGML_TYPE_F16 && op->type == GGML_TYPE_F16);
case GGML_UNARY_OP_SOFTPLUS:
return (op->src[0]->type == GGML_TYPE_F32 && op->type == GGML_TYPE_F32) ||
(op->src[0]->type == GGML_TYPE_F16 && op->type == GGML_TYPE_F16);
default:
return false;
}
@ -6596,6 +6626,108 @@ static void ggml_cl_expm1(ggml_backend_t backend, const ggml_tensor * src0, cons
backend_ctx->enqueue_ndrange_kernel(kernel, 3, global_work_size, local_work_size_ptr, dst);
}
static void ggml_cl_softplus(ggml_backend_t backend, const ggml_tensor * src0, const ggml_tensor * src1, ggml_tensor * dst) {
GGML_ASSERT(src0);
GGML_ASSERT(src0->extra);
GGML_ASSERT(dst);
GGML_ASSERT(dst->extra);
UNUSED(src1);
ggml_backend_opencl_context *backend_ctx = (ggml_backend_opencl_context *)backend->context;
ggml_tensor_extra_cl * extra0 = (ggml_tensor_extra_cl *)src0->extra;
ggml_tensor_extra_cl * extrad = (ggml_tensor_extra_cl *)dst->extra;
cl_ulong offset0_abs = extra0->offset + src0->view_offs;
cl_ulong offsetd_abs = extrad->offset + dst->view_offs;
cl_kernel kernel;
if (dst->type == GGML_TYPE_F32) {
kernel = backend_ctx->kernel_softplus_f32_nd;
} else if (dst->type == GGML_TYPE_F16) {
kernel = backend_ctx->kernel_softplus_f16_nd;
} else {
GGML_ASSERT(false && "Unsupported type for ggml_cl_softplus");
}
GGML_ASSERT(kernel != nullptr);
const int ne00 = src0->ne[0];
const int ne01 = src0->ne[1];
const int ne02 = src0->ne[2];
const int ne03 = src0->ne[3];
const cl_ulong nb00 = src0->nb[0];
const cl_ulong nb01 = src0->nb[1];
const cl_ulong nb02 = src0->nb[2];
const cl_ulong nb03 = src0->nb[3];
const int ne10 = dst->ne[0];
const int ne11 = dst->ne[1];
const int ne12 = dst->ne[2];
const int ne13 = dst->ne[3];
const cl_ulong nb10 = dst->nb[0];
const cl_ulong nb11 = dst->nb[1];
const cl_ulong nb12 = dst->nb[2];
const cl_ulong nb13 = dst->nb[3];
CL_CHECK(clSetKernelArg(kernel, 0, sizeof(cl_mem), &extra0->data_device));
CL_CHECK(clSetKernelArg(kernel, 1, sizeof(cl_ulong), &offset0_abs));
CL_CHECK(clSetKernelArg(kernel, 2, sizeof(cl_mem), &extrad->data_device));
CL_CHECK(clSetKernelArg(kernel, 3, sizeof(cl_ulong), &offsetd_abs));
CL_CHECK(clSetKernelArg(kernel, 4, sizeof(int), &ne00));
CL_CHECK(clSetKernelArg(kernel, 5, sizeof(int), &ne01));
CL_CHECK(clSetKernelArg(kernel, 6, sizeof(int), &ne02));
CL_CHECK(clSetKernelArg(kernel, 7, sizeof(int), &ne03));
CL_CHECK(clSetKernelArg(kernel, 8, sizeof(cl_ulong), &nb00));
CL_CHECK(clSetKernelArg(kernel, 9, sizeof(cl_ulong), &nb01));
CL_CHECK(clSetKernelArg(kernel, 10, sizeof(cl_ulong),&nb02));
CL_CHECK(clSetKernelArg(kernel, 11, sizeof(cl_ulong),&nb03));
CL_CHECK(clSetKernelArg(kernel, 12, sizeof(int), &ne10));
CL_CHECK(clSetKernelArg(kernel, 13, sizeof(int), &ne11));
CL_CHECK(clSetKernelArg(kernel, 14, sizeof(int), &ne12));
CL_CHECK(clSetKernelArg(kernel, 15, sizeof(int), &ne13));
CL_CHECK(clSetKernelArg(kernel, 16, sizeof(cl_ulong),&nb10));
CL_CHECK(clSetKernelArg(kernel, 17, sizeof(cl_ulong),&nb11));
CL_CHECK(clSetKernelArg(kernel, 18, sizeof(cl_ulong),&nb12));
CL_CHECK(clSetKernelArg(kernel, 19, sizeof(cl_ulong),&nb13));
size_t global_work_size[3];
if (ne10 == 0 || ne11 == 0 || ne12 == 0 || ne13 == 0) { // Handle case of 0 elements
return;
}
global_work_size[0] = (size_t)ne10;
global_work_size[1] = (size_t)ne11;
global_work_size[2] = (size_t)ne12;
size_t lws0 = 16, lws1 = 4, lws2 = 1;
if (ne10 < 16) lws0 = ne10;
if (ne11 < 4) lws1 = ne11;
if (ne12 < 1) lws2 = ne12 > 0 ? ne12 : 1;
while (lws0 * lws1 * lws2 > 256 && lws0 > 1) lws0 /= 2;
while (lws0 * lws1 * lws2 > 256 && lws1 > 1) lws1 /= 2;
while (lws0 * lws1 * lws2 > 256 && lws2 > 1) lws2 /= 2;
size_t local_work_size[] = {lws0, lws1, lws2};
size_t* local_work_size_ptr = local_work_size;
if (!backend_ctx->non_uniform_workgroups) {
if (global_work_size[0] % local_work_size[0] != 0 ||
global_work_size[1] % local_work_size[1] != 0 ||
global_work_size[2] % local_work_size[2] != 0) {
local_work_size_ptr = NULL;
}
}
if (global_work_size[0] == 0 || global_work_size[1] == 0 || global_work_size[2] == 0) return;
backend_ctx->enqueue_ndrange_kernel(kernel, 3, global_work_size, local_work_size_ptr, dst);
}
static void ggml_cl_repeat(ggml_backend_t backend, const ggml_tensor * src0, const ggml_tensor * src1_shape_def, ggml_tensor * dst) {
GGML_ASSERT(src0);
GGML_ASSERT(src0->extra);
@ -9775,6 +9907,12 @@ bool ggml_cl_compute_forward(ggml_backend_t backend, struct ggml_tensor * tensor
}
func = ggml_cl_expm1;
break;
case GGML_UNARY_OP_SOFTPLUS:
if (!any_on_device) {
return false;
}
func = ggml_cl_softplus;
break;
default:
return false;
} break;

88
ggml/src/ggml-opencl/kernels/softplus.cl Normal file
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@ -0,0 +1,88 @@
#pragma OPENCL EXTENSION cl_khr_fp16 : enable
//------------------------------------------------------------------------------
// softplus
//------------------------------------------------------------------------------
inline float softplus_f32(float x){
float ax = fabs(x);
float m = fmax(x, 0.0f);
return log1p(exp(-ax)) + m;
}
kernel void kernel_softplus_f32_nd(
global void * p_src0_base,
ulong off_src0_abs,
global void * p_dst_base,
ulong off_dst_abs,
int ne00,
int ne01,
int ne02,
int ne03,
ulong nb00,
ulong nb01,
ulong nb02,
ulong nb03,
int ne10,
int ne11,
int ne12,
int ne13,
ulong nb10,
ulong nb11,
ulong nb12,
ulong nb13
) {
int i0 = get_global_id(0);
int i1 = get_global_id(1);
int i2 = get_global_id(2);
if (i0 < ne10 && i1 < ne11 && i2 < ne12) {
for (int i3 = 0; i3 < ne13; ++i3) {
ulong src_offset_in_tensor = (ulong)i0*nb00 + (ulong)i1*nb01 + (ulong)i2*nb02 + (ulong)i3*nb03;
global const float *src_val_ptr = (global const float *)((global char *)p_src0_base + off_src0_abs + src_offset_in_tensor);
ulong dst_offset_in_tensor = (ulong)i0*nb10 + (ulong)i1*nb11 + (ulong)i2*nb12 + (ulong)i3*nb13;
global float *dst_val_ptr = (global float *)((global char *)p_dst_base + off_dst_abs + dst_offset_in_tensor);
*dst_val_ptr = softplus_f32(*src_val_ptr);
}
}
}
kernel void kernel_softplus_f16_nd(
global void * p_src0_base,
ulong off_src0_abs,
global void * p_dst_base,
ulong off_dst_abs,
int ne00,
int ne01,
int ne02,
int ne03,
ulong nb00,
ulong nb01,
ulong nb02,
ulong nb03,
int ne10,
int ne11,
int ne12,
int ne13,
ulong nb10,
ulong nb11,
ulong nb12,
ulong nb13
) {
int i0 = get_global_id(0);
int i1 = get_global_id(1);
int i2 = get_global_id(2);
if (i0 < ne10 && i1 < ne11 && i2 < ne12) {
for (int i3 = 0; i3 < ne13; ++i3) {
ulong src_offset_in_tensor = (ulong)i0*nb00 + (ulong)i1*nb01 + (ulong)i2*nb02 + (ulong)i3*nb03;
global const half *src_val_ptr = (global const half *)((global char *)p_src0_base + off_src0_abs + src_offset_in_tensor);
ulong dst_offset_in_tensor = (ulong)i0*nb10 + (ulong)i1*nb11 + (ulong)i2*nb12 + (ulong)i3*nb13;
global half *dst_val_ptr = (global half *)((global char *)p_dst_base + off_dst_abs + dst_offset_in_tensor);
*dst_val_ptr = (half)(softplus_f32((float)(*src_val_ptr)));
}
}
}