user: 下面的汇编指令对应的C源代码是什么:

```asm
<covsrt>:
  endbr64
  push   %r14
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdx,%r11
  mov    %ecx,%ebx
  cmp    $0x1,%esi
  jle    L174
  lea    0x1(%rsi),%r9d
  mov    $0x4,%ecx
  mov    $0x2,%r8d
L168:
  cmp    %r8d,%esi
  jl     L70
  mov    %r8,%rax
L92:
  mov    (%rdi,%rax,8),%rdx
  movl   $0x0,(%rdx,%rcx,1)
  add    $0x1,%rax
  cmp    %eax,%esi
  jge    L92
L70:
  add    $0x1,%r8
  add    $0x4,%rcx
  cmp    %r9,%r8
  jne    L168
  cmp    $0x1,%ebx
  jle    L93
L69:
  lea    0x8(%rdi),%r10
  lea    0x4(%r11),%r9
  mov    $0x1,%r12d
  mov    $0x2,%ebp
  jmp    L13
L174:
  cmp    $0x1,%ecx
  jg     L69
  mov    0x8(%rdi),%rax
  movss  0x4(%rax),%xmm1
  test   %esi,%esi
  jg     L247
  movslq 0x4(%r11),%rax
  mov    (%rdi,%rax,8),%rdx
  movss  %xmm1,(%rdx,%rax,4)
  jmp    L57
L129:
  mov    (%r10),%r14
  movss  (%r14,%rax,1),%xmm0
  movslq %ecx,%rcx
  movslq %edx,%rdx
  mov    (%rdi,%rcx,8),%rcx
  movss  %xmm0,(%rcx,%rdx,4)
L240:
  add    $0x4,%rax
  cmp    %r8,%rax
  je     L47
L215:
  mov    (%r11,%rax,1),%edx
  mov    (%r9),%ecx
  cmp    %ecx,%edx
  jle    L129
  mov    (%r10),%r14
  movss  (%r14,%rax,1),%xmm0
  movslq %edx,%rdx
  movslq %ecx,%rcx
  mov    (%rdi,%rdx,8),%rdx
  movss  %xmm0,(%rdx,%rcx,4)
  jmp    L240
L47:
  add    $0x1,%rbp
  add    $0x1,%r12
  add    $0x8,%r10
  add    $0x4,%r9
  cmp    %r12d,%ebx
  jle    L229
L13:
  cmp    %ebp,%ebx
  jl     L47
  lea    0x0(,%rbp,4),%rax
  mov    %ebx,%edx
  sub    %ebp,%edx
  lea    0x2(%r12,%rdx,1),%r8
  shl    $0x2,%r8
  jmp    L215
L229:
  mov    0x8(%rdi),%rax
  movss  0x4(%rax),%xmm1
  test   %esi,%esi
  jle    L39
L247:
  mov    $0x1,%eax
L48:
  mov    (%rdi,%rax,8),%rdx
  movss  (%rdx,%rax,4),%xmm0
  mov    0x8(%rdi),%rdx
  movss  %xmm0,(%rdx,%rax,4)
  mov    (%rdi,%rax,8),%rdx
  movl   $0x0,(%rdx,%rax,4)
  add    $0x1,%rax
  cmp    %eax,%esi
  jge    L48
L39:
  movslq 0x4(%r11),%rax
  mov    (%rdi,%rax,8),%rdx
  movss  %xmm1,(%rdx,%rax,4)
  cmp    $0x1,%ebx
  jle    L57
  lea    0x1(%rbx),%r8d
  shl    $0x2,%r8
  mov    $0x8,%eax
L148:
  movslq (%r11,%rax,1),%rdx
  mov    0x8(%rdi),%rcx
  movss  (%rcx,%rax,1),%xmm0
  mov    (%rdi,%rdx,8),%rcx
  movss  %xmm0,(%rcx,%rdx,4)
  add    $0x4,%rax
  cmp    %rax,%r8
  jne    L148
L57:
  cmp    $0x1,%esi
  jle    L182
  lea    0x10(%rdi),%r8
  add    $0x1,%esi
  mov    $0x8,%edx
  mov    $0x2,%r9d
  jmp    L19
L20:
  mov    (%r8),%rcx
  movss  (%rcx,%rax,1),%xmm0
  mov    (%rdi,%rax,2),%rcx
  movss  %xmm0,(%rcx,%rdx,1)
  add    $0x4,%rax
  cmp    %rdx,%rax
  jne    L20
L116:
  add    $0x1,%r9d
  add    $0x8,%r8
  add    $0x4,%rdx
  cmp    %esi,%r9d
  je     L182
L19:
  mov    $0x4,%eax
  cmp    $0x1,%r9d
  jg     L20
  jmp    L116
L93:
  mov    0x8(%rdi),%rax
  movss  0x4(%rax),%xmm1
  jmp    L247
L182:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r14
  ret
```

assistant: ```c
void covsrt(covar, ma, lista, mfit) float **covar;
int ma, lista[], mfit;
{
  int i, j;
  float swap;
  for (j = 1; j < ma; j++)
    for (i = j + 1; i <= ma; i++)
      covar[i][j] = 0.0;
  for (i = 1; i < mfit; i++)
    for (j = i + 1; j <= mfit; j++) {
      if (lista[j] > lista[i])
        covar[lista[j]][lista[i]] = covar[i][j];
      else
        covar[lista[i]][lista[j]] = covar[i][j];
    }
  swap = covar[1][1];
  for (j = 1; j <= ma; j++) {
    covar[1][j] = covar[j][j];
    covar[j][j] = 0.0;
  }
  covar[lista[1]][lista[1]] = swap;
  for (j = 2; j <= mfit; j++)
    covar[lista[j]][lista[j]] = covar[1][j];
  for (j = 2; j <= ma; j++)
    for (i = 1; i <= j - 1; i++)
      covar[i][j] = covar[j][i];
}
```