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/*
Copyright (c) 2025, Intel Corporation
SPDX-License-Identifier: BSD-3-Clause
*/
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <vector>
#include <cmath>
#include "ispc/ispc.h"
// Function pointer type for our ISPC function
typedef void (*simple_func_t)(float vin[], float vout[], int count);
int main() {
// Initialize ISPC
std::cout << "Initializing ISPC...\n";
if (!ispc::Initialize()) {
std::cerr << "Error: Failed to initialize ISPC\n";
return 1;
}
std::cout << "Testing JIT compilation of simple.ispc...\n";
// Test 1: Basic JIT compilation and execution
{
std::cout << "\n=== Test 1: Basic JIT compilation ===\n";
std::vector<std::string> args = {"-O2"};
auto engine = ispc::ISPCEngine::CreateFromArgs(args);
if (!engine) {
std::cerr << "Failed to create ISPC engine\n";
ispc::Shutdown();
return 1;
}
int result = engine->CompileFromFileToJit("simple.ispc");
if (result == 0) {
std::cout << "JIT compilation successful!\n";
// Get the function pointer
auto func_ptr = engine->GetJitFunction("simple");
if (func_ptr) {
std::cout << "Successfully retrieved 'simple' function from JIT\n";
// Test the function
simple_func_t simple_func = reinterpret_cast<simple_func_t>(func_ptr);
// Prepare test data
const int count = 8;
float input[count] = {1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f};
float output[count] = {0.0f};
std::cout << "Executing JIT-compiled function...\n";
simple_func(input, output, count);
// Verify and display results
std::cout << "Results:\n";
bool all_correct = true;
for (int i = 0; i < count; i++) {
float expected = (input[i] < 3.0f) ? input[i] * input[i] : sqrt(input[i]);
std::cout << " input[" << i << "] = " << input[i]
<< " -> output[" << i << "] = " << output[i]
<< " (expected: " << expected << ")";
if (fabs(output[i] - expected) < 0.001f) {
std::cout << " ✓\n";
} else {
std::cout << " ✗\n";
all_correct = false;
}
}
if (all_correct) {
std::cout << "SUCCESS: All results match expected values\n";
} else {
std::cout << "FAILURE: Some results don't match\n";
}
} else {
std::cerr << "Failed to get 'simple' function from JIT\n";
}
} else {
std::cerr << "JIT compilation failed with code: " << result << "\n";
}
}
// Test 2: Multiple JIT engines with different optimization levels
{
std::cout << "\n=== Test 2: Multiple JIT engines ===\n";
std::vector<std::string> args_o2 = {"-O2"};
std::vector<std::string> args_o0 = {"-O0"};
auto engine_o2 = ispc::ISPCEngine::CreateFromArgs(args_o2);
auto engine_o0 = ispc::ISPCEngine::CreateFromArgs(args_o0);
if (!engine_o2 || !engine_o0) {
std::cerr << "Failed to create ISPC engines\n";
} else {
std::cout << "Created engines with different optimization levels\n";
// Compile with both engines
int result_o2 = engine_o2->CompileFromFileToJit("simple.ispc");
int result_o0 = engine_o0->CompileFromFileToJit("simple.ispc");
if (result_o2 == 0 && result_o0 == 0) {
std::cout << "Both engines compiled successfully\n";
// Get functions from both engines
auto func_o2 = engine_o2->GetJitFunction("simple");
auto func_o0 = engine_o0->GetJitFunction("simple");
if (func_o2 && func_o0) {
std::cout << "SUCCESS: Both engines provide the 'simple' function\n";
std::cout << " - O2 optimized function: " << func_o2 << "\n";
std::cout << " - O0 function: " << func_o0 << "\n";
// Test that both functions work correctly
simple_func_t simple_o2 = reinterpret_cast<simple_func_t>(func_o2);
simple_func_t simple_o0 = reinterpret_cast<simple_func_t>(func_o0);
const int count = 4;
float input[count] = {1.5f, 2.5f, 3.5f, 4.5f};
float output_o2[count] = {0.0f};
float output_o0[count] = {0.0f};
simple_o2(input, output_o2, count);
simple_o0(input, output_o0, count);
// Verify both produce same results
bool results_match = true;
for (int i = 0; i < count; i++) {
if (fabs(output_o2[i] - output_o0[i]) > 0.001f) {
results_match = false;
break;
}
}
if (results_match) {
std::cout << "SUCCESS: Both optimization levels produce identical results\n";
} else {
std::cout << "Note: Different optimization levels may produce slightly different results\n";
}
} else {
std::cerr << "Failed to get functions from one or both engines\n";
}
} else {
std::cerr << "Compilation failed - O2: " << result_o2 << ", O0: " << result_o0 << "\n";
}
}
}
// Test 3: Test engine cleanup
{
std::cout << "\n=== Test 3: Engine cleanup ===\n";
std::vector<std::string> args = {"--target=host"};
auto engine = ispc::ISPCEngine::CreateFromArgs(args);
if (engine) {
int result = engine->CompileFromFileToJit("simple.ispc");
if (result == 0) {
auto func = engine->GetJitFunction("simple");
if (func) {
std::cout << "Function retrieved successfully\n";
}
}
std::cout << "Engine will be automatically cleaned up when it goes out of scope\n";
}
std::cout << "SUCCESS: Engine cleanup test completed\n";
}
std::cout << "\nCleaning up...\n";
ispc::Shutdown();
std::cout << "ISPC shutdown complete\n";
return 0;
}
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