user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<daxpy_>:
  endbr64
  push   %rbp
  push   %rbx
  mov    %rdi,%rax
  mov    (%rdi),%ebp
  test   %ebp,%ebp
  jle    L43
  mov    %rsi,%rdi
  mov    %rdx,%r11
  mov    %rcx,%rbx
  pxor   %xmm0,%xmm0
  ucomisd (%rsi),%xmm0
  jp     L55
  je     L43
L55:
  mov    (%rbx),%edx
  cmp    $0x1,%edx
  je     L11
  movl   $0x1,D36(%rip)
  movl   $0x1,D99(%rip)
  test   %edx,%edx
  jns    L162
  mov    $0x1,%eax
  sub    %ebp,%eax
  imul   %edx,%eax
  add    $0x1,%eax
  mov    %eax,D52(%rip)
L162:
  mov    (%r9),%edx
  test   %edx,%edx
  js     L156
L25:
  mov    D99(%rip),%edx
  mov    D52(%rip),%ecx
  mov    $0x0,%eax
L137:
  movslq %edx,%rsi
  lea    -0x8(%r8,%rsi,8),%rsi
  movslq %ecx,%r10
  movsd  -0x8(%r11,%r10,8),%xmm0
  mulsd  (%rdi),%xmm0
  addsd  (%rsi),%xmm0
  movsd  %xmm0,(%rsi)
  add    (%rbx),%ecx
  add    (%r9),%edx
  mov    %eax,%esi
  add    $0x1,%eax
  cmp    %ebp,%eax
  jne    L137
  mov    %ecx,D52(%rip)
  mov    %edx,D52(%rip)
  add    $0x2,%esi
  mov    %esi,D52(%rip)
L43:
  mov    $0x0,%eax
  pop    %rbx
  pop    %rbp
  ret
L11:
  cmpl   $0x1,(%r9)
  je     L115
  movl   $0x1,D52(%rip)
  movl   $0x1,D52(%rip)
  jmp    L162
L115:
  mov    %ebp,%edx
  sar    $0x1f,%edx
  shr    $0x1e,%edx
  lea    0x0(%rbp,%rdx,1),%ecx
  and    $0x3,%ecx
  sub    %edx,%ecx
  test   $0x3,%bpl
  je     L145
  movl   $0x1,D52(%rip)
  test   %ecx,%ecx
  jle    L1
  mov    $0x1,%edx
L100:
  movsd  (%rdi),%xmm0
  mulsd  -0x8(%r11,%rdx,8),%xmm0
  addsd  -0x8(%r8,%rdx,8),%xmm0
  movsd  %xmm0,-0x8(%r8,%rdx,8)
  add    $0x1,%rdx
  cmp    %edx,%ecx
  jge    L100
  lea    0x1(%rcx),%edx
  mov    %edx,D127(%rip)
L1:
  cmpl   $0x3,(%rax)
  jle    L43
L145:
  lea    0x1(%rcx),%edx
  mov    (%rax),%esi
  mov    %edx,D127(%rip)
  cmp    %esi,%edx
  jg     L43
  lea    0x2(%rcx),%eax
  cltq
  lea    -0x8(,%rax,8),%rdx
  lea    (%r8,%rdx,1),%rax
  add    %r11,%rdx
  lea    -0x1(%rsi),%r9d
  sub    %ecx,%r9d
  shr    $0x2,%r9d
  mov    %r9d,%r10d
  movslq %ecx,%rsi
  lea    (%rsi,%r10,4),%rsi
  lea    0x28(%r8,%rsi,8),%rsi
L161:
  movsd  (%rdi),%xmm0
  mulsd  -0x8(%rdx),%xmm0
  addsd  -0x8(%rax),%xmm0
  movsd  %xmm0,-0x8(%rax)
  movsd  (%rdi),%xmm0
  mulsd  (%rdx),%xmm0
  addsd  (%rax),%xmm0
  movsd  %xmm0,(%rax)
  movsd  (%rdi),%xmm0
  mulsd  0x8(%rdx),%xmm0
  addsd  0x8(%rax),%xmm0
  movsd  %xmm0,0x8(%rax)
  movsd  (%rdi),%xmm0
  mulsd  0x10(%rdx),%xmm0
  addsd  0x10(%rax),%xmm0
  movsd  %xmm0,0x10(%rax)
  add    $0x20,%rax
  add    $0x20,%rdx
  cmp    %rsi,%rax
  jne    L161
  lea    0x5(%rcx,%r9,4),%eax
  mov    %eax,D127(%rip)
  jmp    L43
L156:
  mov    $0x1,%eax
  sub    %ebp,%eax
  imul   %edx,%eax
  add    $0x1,%eax
  mov    %eax,D127(%rip)
  jmp    L25
```

assistant: ```c
int daxpy_(int *n, double *da, double *dx, int *incx, double *dy, int *incy) {
  int i__1;
  static int i__, m, ix, iy, mp1;
  --dy;
  --dx;
  if (*n <= 0) {
    return 0;
  }
  if (*da == 0.) {
    return 0;
  }
  if (*incx == 1 && *incy == 1) {
    goto L20;
  }
  ix = 1;
  iy = 1;
  if (*incx < 0) {
    ix = (-(*n) + 1) * *incx + 1;
  }
  if (*incy < 0) {
    iy = (-(*n) + 1) * *incy + 1;
  }
  i__1 = *n;
  for (i__ = 1; i__ <= i__1; ++i__) {
    dy[iy] += *da * dx[ix];
    ix += *incx;
    iy += *incy;
  }
  return 0;
L20:
  m = *n % 4;
  if (m == 0) {
    goto L40;
  }
  i__1 = m;
  for (i__ = 1; i__ <= i__1; ++i__) {
    dy[i__] += *da * dx[i__];
  }
  if (*n < 4) {
    return 0;
  }
L40:
  mp1 = m + 1;
  i__1 = *n;
  for (i__ = mp1; i__ <= i__1; i__ += 4) {
    dy[i__] += *da * dx[i__];
    dy[i__ + 1] += *da * dx[i__ + 1];
    dy[i__ + 2] += *da * dx[i__ + 2];
    dy[i__ + 3] += *da * dx[i__ + 3];
  }
  return 0;
}
```