include/core/kernel.h


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#pragma once

#include <stdbool.h>
#include <stddef.h>

#include "maths/matrix.h"
#include "maths/vector.h"

enum PsiGateType
{
	PSI_GATE_TYPE_DIAGONAL,
	PSI_GATE_TYPE_NON_DIAGONAL,
	PSI_GATE_TYPE_CONTROLLED,
};

struct PsiKernel
{
	struct PsiMatrix matrix;
	size_t *targets;
	size_t target_count;
	char *name;
	enum PsiGateType gate_type;
};

struct PsiKernel psi_new_kernel(const char *name, struct PsiMatrix matrix, const size_t *targets, size_t target_count);
struct PsiKernel psi_clone_kernel(struct PsiKernel kernel);
void psi_free_kernel(struct PsiKernel *kernel);

bool psi_kernels_share_qubits(struct PsiKernel a, struct PsiKernel b);
bool psi_kernels_commute(struct PsiKernel a, struct PsiKernel b);
bool psi_kernels_can_fuse(struct PsiKernel a, struct PsiKernel b);
bool psi_fuse_kernels(struct PsiKernel a, struct PsiKernel b, struct PsiKernel *out);

struct PsiKernelBatch
{
	struct PsiKernel *kernels;
	size_t count;
	size_t capacity;
	size_t num_qubits;
};

struct PsiKernelBatch psi_new_kernel_batch(size_t num_qubits);
void psi_free_kernel_batch(struct PsiKernelBatch *batch);
void psi_add_kernel(struct PsiKernelBatch *batch, struct PsiKernel kernel);
void psi_optimize_kernel_batch(struct PsiKernelBatch *batch);
void psi_execute_kernel_batch(struct PsiKernelBatch batch, struct PsiVector *state);