提交记录 17455 - Judge Duck Online

用户	题目	状态	得分	用时	内存	语言	代码长度
EntropyIncreaser	mmmd1k. 测测你的双精度矩阵乘法-1k	Compile Error	0	0 ns	0 KB	C++11	597 B

提交时间	评测时间
2022-03-04 15:43:08	2022-03-04 15:43:09

代码

// copied from IntroCS
void matrix_multiply(int n, double* A, double* B, double* C){
    for (size_t i = 0; i < n; i++) {
        for (size_t j = 0; j < n; j += 256 / sizeof(double)) {
            //c0=C[i,j]//__m256d: a 256-bit register of four doubles
            __m256dc0 = _mm256_load_pd(C+i*n+j);
            for(size_tk = 0; k < n; k++){
                //c0 += A[i,k]*B[k,j]
                c0 = _mm256_add_pd(c0,_mm256_mul_pd(_mm256_broadcast_sd(A+i* n+k)),_mm256_load_pd(B+k*n+j));
                //C[i,j]=c0
                _mm256_store_pd(C+i*n+j, c0);
            }
        }
    }
}

评测结果

Compilation

N/A

Compile Error

Score: N/A

显示更多

jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp: In function ‘void matrix_multiply(int, double*, double*, double*)’:
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:3:10: error: ‘size_t’ was not declared in this scope
    3 |     for (size_t i = 0; i < n; i++) {
      |          ^~~~~~
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:1:1: note: ‘size_t’ is defined in header ‘<cstddef>’; did you forget to ‘#include <cstddef>’?
  +++ |+#include <cstddef>
    1 | // copied from IntroCS
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:3:24: error: ‘i’ was not declared in this scope
    3 |     for (size_t i = 0; i < n; i++) {
      |                        ^
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:4:20: error: expected ‘;’ before ‘j’
    4 |         for (size_t j = 0; j < n; j += 256 / sizeof(double)) {
      |                    ^~
      |                    ;
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:4:28: error: ‘j’ was not declared in this scope
    4 |         for (size_t j = 0; j < n; j += 256 / sizeof(double)) {
      |                            ^
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:6:13: error: ‘__m256dc0’ was not declared in this scope
    6 |             __m256dc0 = _mm256_load_pd(C+i*n+j);
      |             ^~~~~~~~~
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:6:25: error: ‘_mm256_load_pd’ was not declared in this scope
    6 |             __m256dc0 = _mm256_load_pd(C+i*n+j);
      |                         ^~~~~~~~~~~~~~
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:7:17: error: ‘size_tk’ was not declared in this scope
    7 |             for(size_tk = 0; k < n; k++){
      |                 ^~~~~~~
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contestant.cpp:7:30: error: ‘k’ was not declared in this scope
    7 |             for(size_tk = 0; k < n; k++){
      |                              ^
jp_data/tasks/bc28689a9b8e11ec8d96fdb470a28eb4/contesta