在C中有没有优化矩阵乘法的方法？

void matrix_multiply_unrolled(int A[N][N], int B[N][N], int C[N][N]) {
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            int sum = 0;
            for (int k = 0; k < N; k += 4) {
                sum += A[i][k] * B[k][j];
                sum += A[i][k+1] * B[k+1][j];
                sum += A[i][k+2] * B[k+2][j];
                sum += A[i][k+3] * B[k+3][j];
            }
            C[i][j] = sum;
        }
    }
}

#define BLOCK_SIZE 32

void matrix_multiply_blocked(int A[N][N], int B[N][N], int C[N][N]) {
    for (int ii = 0; ii < N; ii += BLOCK_SIZE) {
        for (int jj = 0; jj < N; jj += BLOCK_SIZE) {
            for (int kk = 0; kk < N; kk += BLOCK_SIZE) {
                for (int i = ii; i < ii + BLOCK_SIZE && i < N; i++) {
                    for (int j = jj; j < jj + BLOCK_SIZE && j < N; j++) {
                        for (int k = kk; k < kk + BLOCK_SIZE && k < N; k++) {
                            C[i][j] += A[i][k] * B[k][j];
                        }
                    }
                }
            }
        }
    }
}

#include <immintrin.h>

void matrix_multiply_simd(int A[N][N], int B[N][N], int C[N][N]) {
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            __m256i sum = _mm256_setzero_si256();
            for (int k = 0; k < N; k += 8) {
                __m256i a = _mm256_loadu_si256((__m256i*)&A[i][k]);
                __m256i b = _mm256_loadu_si256((__m256i*)&B[k][j]);
                sum = _mm256_add_epi32(sum, _mm256_mullo_epi32(a, b));
            }
            int result[8];
            _mm256_storeu_si256((__m256i*)result, sum);
            for (int l = 0; l < 8; l++) {
                C[i][j] += result[l];
            }
        }
    }
}

#include <pthread.h>

void* multiply_block(void* args) {
    // 实现具体的矩阵乘法逻辑
    return NULL;
}

void matrix_multiply_parallel(int A[N][N], int B[N][N], int C[N][N]) {
    pthread_t threads[NUM_THREADS];
    for (int t = 0; t < NUM_THREADS; t++) {
        pthread_create(&threads[t], NULL, multiply_block, (void*)(intptr_t)t);
    }
    for (int t = 0; t < NUM_THREADS; t++) {
        pthread_join(threads[t], NULL);
    }
}