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//
// Copyright (C) 2022 THL A29 Limited, a Tencent company. All rights reserved.
//
// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
// in compliance with the License. You may obtain a copy of the License at
//
// https://opensource.org/licenses/BSD-3-Clause
//
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
#include "save_ncnn.h"
namespace pnnx {
static bool type_is_integer(int type)
{
if (type == 1) return false;
if (type == 2) return false;
if (type == 3) return false;
if (type == 4) return true;
if (type == 5) return true;
if (type == 6) return true;
if (type == 7) return true;
if (type == 8) return true;
if (type == 9) return true;
if (type == 10) return false;
if (type == 11) return false;
if (type == 12) return false;
return false;
}
static const char* type_to_dtype_string(int type)
{
if (type == 1) return "torch.float";
if (type == 2) return "torch.double";
if (type == 3) return "torch.half";
if (type == 4) return "torch.int";
if (type == 5) return "torch.long";
if (type == 6) return "torch.short";
if (type == 7) return "torch.int8";
if (type == 8) return "torch.uint8";
if (type == 9) return "torch.bool";
if (type == 10) return "torch.complex64";
if (type == 11) return "torch.complex128";
if (type == 12) return "torch.complex32";
return "null";
}
static bool string_is_positive_integer(const std::string& t)
{
for (size_t i = 0; i < t.size(); i++)
{
if (t[i] < '0' || t[i] > '9')
return false;
}
return true;
}
static unsigned short float32_to_float16(float value)
{
// 1 : 8 : 23
union
{
unsigned int u;
float f;
} tmp;
tmp.f = value;
// 1 : 8 : 23
unsigned short sign = (tmp.u & 0x80000000) >> 31;
unsigned short exponent = (tmp.u & 0x7F800000) >> 23;
unsigned int significand = tmp.u & 0x7FFFFF;
// NCNN_LOGE("%d %d %d", sign, exponent, significand);
// 1 : 5 : 10
unsigned short fp16;
if (exponent == 0)
{
// zero or denormal, always underflow
fp16 = (sign << 15) | (0x00 << 10) | 0x00;
}
else if (exponent == 0xFF)
{
// infinity or NaN
fp16 = (sign << 15) | (0x1F << 10) | (significand ? 0x200 : 0x00);
}
else
{
// normalized
short newexp = exponent + (-127 + 15);
if (newexp >= 31)
{
// overflow, return infinity
fp16 = (sign << 15) | (0x1F << 10) | 0x00;
}
else if (newexp <= 0)
{
// Some normal fp32 cannot be expressed as normal fp16
fp16 = (sign << 15) | (0x00 << 10) | 0x00;
}
else
{
// normal fp16
fp16 = (sign << 15) | (newexp << 10) | (significand >> 13);
}
}
return fp16;
}
static size_t alignSize(size_t sz, int n)
{
return (sz + n - 1) & -n;
}
int save_ncnn(const Graph& g, const std::string& parampath, const std::string& binpath, const std::string& pypath, int fp16)
{
FILE* paramfp = fopen(parampath.c_str(), "wb");
if (!paramfp)
{
fprintf(stderr, "fopen %s failed\n", parampath.c_str());
return -1;
}
FILE* binfp = fopen(binpath.c_str(), "wb");
if (!binfp)
{
fprintf(stderr, "fopen %s failed\n", binpath.c_str());
fclose(paramfp);
return -1;
}
// magic
fprintf(paramfp, "7767517\n");
// op count and oprand count
fprintf(paramfp, "%d %d\n", (int)g.ops.size(), (int)g.operands.size());
for (const Operator* op : g.ops)
{
fprintf(paramfp, "%-24s %-24s %d %d", op->type.c_str(), op->name.c_str(), (int)op->inputs.size(), (int)op->outputs.size());
for (const Operand* oprand : op->inputs)
{
fprintf(paramfp, " %s", oprand->name.c_str());
}
for (const Operand* oprand : op->outputs)
{
fprintf(paramfp, " %s", oprand->name.c_str());
}
for (const auto& it : op->params)
{
const Parameter& param = it.second;
if (!string_is_positive_integer(it.first))
{
fprintf(stderr, "ignore %s %s param %s=", op->type.c_str(), op->name.c_str(), it.first.c_str());
if (param.type == 0)
{
fprintf(stderr, "None");
}
if (param.type == 1)
{
if (param.b)
fprintf(stderr, "True");
else
fprintf(stderr, "False");
}
if (param.type == 2)
{
fprintf(stderr, "%d", param.i);
}
if (param.type == 3)
{
fprintf(stderr, "%e", param.f);
}
if (param.type == 4)
{
fprintf(stderr, "%s", param.s.c_str());
}
if (param.type == 5)
{
fprintf(stderr, "(");
for (size_t i = 0; i < param.ai.size(); i++)
{
fprintf(stderr, "%d", param.ai[i]);
if (i + 1 != param.ai.size())
fprintf(stderr, ",");
}
fprintf(stderr, ")");
}
if (param.type == 6)
{
fprintf(stderr, "(");
for (size_t i = 0; i < param.af.size(); i++)
{
fprintf(stderr, "%e", param.af[i]);
if (i + 1 != param.af.size())
fprintf(stderr, ",");
}
fprintf(stderr, ")");
}
if (param.type == 7)
{
fprintf(stderr, "(");
for (size_t i = 0; i < param.as.size(); i++)
{
fprintf(stderr, "%s", param.as[i].c_str());
if (i + 1 != param.as.size())
fprintf(stderr, ",");
}
fprintf(stderr, ")");
}
fprintf(stderr, "\n");
continue;
}
const int idkey = std::stoi(it.first);
if (param.type == 2)
{
fprintf(paramfp, " %d=%d", idkey, param.i);
}
if (param.type == 3)
{
fprintf(paramfp, " %d=%e", idkey, param.f);
}
if (param.type == 5)
{
const int array_size = (int)param.ai.size();
fprintf(paramfp, " %d=%d", -23300 - idkey, array_size);
for (size_t i = 0; i < param.ai.size(); i++)
{
fprintf(paramfp, ",%d", param.ai[i]);
}
}
if (param.type == 6)
{
const int array_size = (int)param.af.size();
fprintf(paramfp, " %d=%d", -23300 - idkey, array_size);
for (size_t i = 0; i < param.af.size(); i++)
{
fprintf(paramfp, ",%e", param.af[i]);
}
}
}
bool is_type_flag_fp32 = false;
for (const auto& it : op->attrs)
{
// fprintf(paramfp, " @%s=", it.first.c_str());
const Attribute& attr = it.second;
if (fp16 && is_type_flag_fp32)
{
// fp32 -> fp16
const float* p = (const float*)attr.data.data();
int len = attr.data.size() / 4;
std::vector<char> data_fp16(alignSize(len * 2, 4));
unsigned short* p_fp16 = (unsigned short*)data_fp16.data();
for (int i = 0; i < len; i++)
{
p_fp16[i] = float32_to_float16(p[i]);
}
// pad size to 4bytes
if (len % 2 == 1)
{
// pad with fixed value for model hash consistency
p_fp16[len] = 0x2283;
}
fwrite(data_fp16.data(), data_fp16.size(), 1, binfp);
is_type_flag_fp32 = false;
continue;
}
if (fp16 && attr.type == 0 && attr.data == std::vector<char> {0, 0, 0, 0})
{
// write fp16 flag
unsigned int fp16_flag = 0x01306B47;
fwrite((const char*)&fp16_flag, sizeof(fp16_flag), 1, binfp);
is_type_flag_fp32 = true;
continue;
}
fwrite(attr.data.data(), attr.data.size(), 1, binfp);
}
// if (op->inputnames.size() == op->inputs.size())
// {
// for (size_t i = 0; i < op->inputs.size(); i++)
// {
// const Operand* oprand = op->inputs[i];
// fprintf(paramfp, " $%s=%s", op->inputnames[i].c_str(), oprand->name.c_str());
// }
// }
// for (const Operand* oprand : op->outputs)
// {
// if (oprand->params.find("__batch_index") == oprand->params.end())
// continue;
//
// const int batch_index = oprand->params.at("__batch_index").i;
//
// fprintf(paramfp, " #%s=%d", oprand->name.c_str(), batch_index);
// }
// for (const Operand* oprand : op->outputs)
// {
// if (oprand->shape.empty())
// continue;
//
// fprintf(paramfp, " #%s=", oprand->name.c_str());
//
// fprintf(paramfp, "(");
// for (int64_t i = 0; i < oprand->shape.size() - 1; i++)
// {
// fprintf(paramfp, "%d,", oprand->shape[i]);
// }
// if (oprand->shape.size() > 0)
// fprintf(paramfp, "%d", oprand->shape[oprand->shape.size() - 1]);
// fprintf(paramfp, ")");
//
// fprintf(paramfp, type_to_string(oprand->type));
// }
fprintf(paramfp, "\n");
}
fclose(paramfp);
fclose(binfp);
FILE* pyfp = fopen(pypath.c_str(), "wb");
if (!pyfp)
{
fprintf(stderr, "fopen %s failed\n", pypath.c_str());
return -1;
}
fprintf(pyfp, "import numpy as np\n");
fprintf(pyfp, "import ncnn\n");
fprintf(pyfp, "import torch\n");
fprintf(pyfp, "\n");
// test inference
{
fprintf(pyfp, "def test_inference():\n");
fprintf(pyfp, " torch.manual_seed(0)\n");
for (int input_index = 0;; input_index++)
{
std::string input_name = std::string("in") + std::to_string(input_index);
const Operand* r = g.get_operand(input_name);
if (!r)
break;
if (type_is_integer(r->type))
{
fprintf(pyfp, " %s = torch.randint(10, (", input_name.c_str());
for (size_t i = 0; i < r->shape.size(); i++)
{
fprintf(pyfp, "%d", r->shape[i]);
if (i + 1 != r->shape.size() || r->shape.size() == 1)
fprintf(pyfp, ", ");
}
fprintf(pyfp, "), dtype=%s)\n", type_to_dtype_string(r->type));
}
else
{
fprintf(pyfp, " %s = torch.rand(", input_name.c_str());
for (size_t i = 0; i < r->shape.size(); i++)
{
fprintf(pyfp, "%d, ", r->shape[i]);
}
fprintf(pyfp, "dtype=%s)\n", type_to_dtype_string(r->type));
}
}
fprintf(pyfp, " out = []\n");
fprintf(pyfp, "\n");
fprintf(pyfp, " with ncnn.Net() as net:\n");
fprintf(pyfp, " net.load_param(\"%s\")\n", parampath.c_str());
fprintf(pyfp, " net.load_model(\"%s\")\n", binpath.c_str());
fprintf(pyfp, "\n");
fprintf(pyfp, " with net.create_extractor() as ex:\n");
for (int input_index = 0;; input_index++)
{
std::string input_name = std::string("in") + std::to_string(input_index);
const Operand* r = g.get_operand(input_name);
if (!r)
break;
const int batch_index = r->params.at("__batch_index").i;
if (batch_index != 233)
{
fprintf(pyfp, " ex.input(\"%s\", ncnn.Mat(%s.squeeze(%d).numpy()).clone())\n", input_name.c_str(), input_name.c_str(), batch_index);
}
else
{
fprintf(pyfp, " ex.input(\"%s\", ncnn.Mat(%s.numpy()).clone())\n", input_name.c_str(), input_name.c_str());
}
}
fprintf(pyfp, "\n");
for (int output_index = 0;; output_index++)
{
std::string output_name = std::string("out") + std::to_string(output_index);
const Operand* r = g.get_operand(output_name);
if (!r)
break;
fprintf(pyfp, " _, %s = ex.extract(\"%s\")\n", output_name.c_str(), output_name.c_str());
const int batch_index = r->params.at("__batch_index").i;
if (batch_index != 233)
{
fprintf(pyfp, " out.append(torch.from_numpy(np.array(%s)).unsqueeze(%d))\n", output_name.c_str(), batch_index);
}
else
{
fprintf(pyfp, " out.append(torch.from_numpy(np.array(%s)))\n", output_name.c_str());
}
}
fprintf(pyfp, "\n");
fprintf(pyfp, " if len(out) == 1:\n");
fprintf(pyfp, " return out[0]\n");
fprintf(pyfp, " else:\n");
fprintf(pyfp, " return tuple(out)\n");
}
fclose(pyfp);
return 0;
}
} // namespace pnnx
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