user: 下面的汇编指令对应的C源代码是什么：

```asm
<blasDSCAL>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %edi,-0x14(%rbp)
  movsd  %xmm0,-0x20(%rbp)
  mov    %rsi,-0x28(%rbp)
  mov    %edx,-0x18(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  jle    L24
  cmpl   $0x1,-0x18(%rbp)
  jne    L44
  mov    -0x14(%rbp),%eax
  movslq %eax,%rdx
  imul   $0x66666667,%rdx,%rdx
  shr    $0x20,%rdx
  sar    %edx
  mov    %eax,%esi
  sar    $0x1f,%esi
  mov    %edx,%ecx
  sub    %esi,%ecx
  mov    %ecx,%edx
  shl    $0x2,%edx
  add    %ecx,%edx
  sub    %edx,%eax
  mov    %eax,-0x4(%rbp)
  movl   $0x0,-0xc(%rbp)
  jmp    L98
L92:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mulsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0xc(%rbp)
L98:
  mov    -0xc(%rbp),%eax
  cmp    -0x4(%rbp),%eax
  jl     L92
  mov    -0x4(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  jmp    L33
L97:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mulsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mulsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mulsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x3,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x3,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mulsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x4,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x4,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mulsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x5,-0xc(%rbp)
L33:
  mov    -0xc(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jl     L97
  jmp    L24
L44:
  cmpl   $0x0,-0x18(%rbp)
  js     L101
  movl   $0x0,-0x8(%rbp)
  jmp    L105
L101:
  mov    $0x1,%eax
  sub    -0x14(%rbp),%eax
  mov    -0x18(%rbp),%edx
  imul   %edx,%eax
  mov    %eax,-0x8(%rbp)
L105:
  movl   $0x0,-0xc(%rbp)
  jmp    L77
L58:
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mulsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  mov    -0x18(%rbp),%eax
  add    %eax,-0x8(%rbp)
  addl   $0x1,-0xc(%rbp)
L77:
  mov    -0xc(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jl     L58
L24:
  nop
  pop    %rbp
  ret
```

assistant: ```c
void blasDSCAL(int n, double sa, double x[], int incx) {
  int i, ix, m;
  if (n <= 0) {
  } else if (incx == 1) {
    m = n % 5;
    for (i = 0; i < m; i++) {
      x[i] = sa * x[i];
    }
    for (i = m; i < n; i = i + 5) {
      x[i] = sa * x[i];
      x[i + 1] = sa * x[i + 1];
      x[i + 2] = sa * x[i + 2];
      x[i + 3] = sa * x[i + 3];
      x[i + 4] = sa * x[i + 4];
    }
  } else {
    if (0 <= incx) {
      ix = 0;
    } else {
      ix = (-n + 1) * incx;
    }
    for (i = 0; i < n; i++) {
      x[ix] = sa * x[ix];
      ix = ix + incx;
    }
  }
}
```