user: Demonstrate the C code that generates the assembly output below:

```asm
<blocksum>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %edx,-0x34(%rbp)
  mov    %ecx,-0x38(%rbp)
  mov    %r8d,-0x3c(%rbp)
  mov    %r9,-0x48(%rbp)
  mov    -0x34(%rbp),%eax
  imul   -0x38(%rbp),%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x18(%rbp),%eax
  add    %eax,%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edx
  mov    -0x30(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    -0x30(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x18(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  movl   $0x0,-0x1c(%rbp)
  jmp    L207
L200:
  mov    -0x1c(%rbp),%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,-0x14(%rbp)
  movl   $0x0,-0x20(%rbp)
  jmp    L99
L24:
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  addss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0x20(%rbp)
L99:
  mov    -0x20(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L24
  addl   $0x1,-0x1c(%rbp)
L207:
  mov    -0x1c(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jl     L200
  movl   $0x0,-0x1c(%rbp)
  jmp    L19
L176:
  mov    -0x1c(%rbp),%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,-0x14(%rbp)
  movl   $0x1,-0x20(%rbp)
  jmp    L170
L134:
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %eax,%edx
  mov    -0x3c(%rbp),%eax
  add    %edx,%eax
  cmp    %eax,-0x18(%rbp)
  jle    L120
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %eax,%edx
  mov    -0x3c(%rbp),%eax
  add    %edx,%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  addss  %xmm1,%xmm0
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  subss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  jmp    L168
L120:
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x14(%rbp),%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  subss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
L168:
  addl   $0x1,-0x20(%rbp)
L170:
  mov    -0x20(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L134
  addl   $0x1,-0x1c(%rbp)
L19:
  mov    -0x1c(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jl     L176
  movl   $0x0,-0x20(%rbp)
  jmp    L23
L206:
  movl   $0x0,-0x1c(%rbp)
  jmp    L51
L172:
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x1c(%rbp),%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  addss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0x1c(%rbp)
L51:
  mov    -0x1c(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L172
  addl   $0x1,-0x20(%rbp)
L23:
  mov    -0x20(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L206
  movl   $0x0,-0x20(%rbp)
  jmp    L121
L55:
  movl   $0x1,-0x1c(%rbp)
  jmp    L125
L107:
  mov    -0x1c(%rbp),%edx
  mov    -0x3c(%rbp),%eax
  add    %edx,%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cmp    %eax,-0x18(%rbp)
  jle    L35
  mov    -0x1c(%rbp),%eax
  sub    $0x1,%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x1c(%rbp),%edx
  mov    -0x3c(%rbp),%eax
  add    %edx,%eax
  sub    $0x1,%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  addss  %xmm1,%xmm0
  mov    -0x1c(%rbp),%eax
  sub    $0x1,%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x1c(%rbp),%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  subss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  jmp    L49
L35:
  mov    -0x1c(%rbp),%eax
  sub    $0x1,%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x1c(%rbp),%eax
  sub    $0x1,%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm1
  mov    -0x1c(%rbp),%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  subss  %xmm1,%xmm0
  movss  %xmm0,(%rax)
L49:
  addl   $0x1,-0x1c(%rbp)
L125:
  mov    -0x1c(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jl     L107
  addl   $0x1,-0x20(%rbp)
L121:
  mov    -0x20(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L55
  movl   $0x0,-0x20(%rbp)
  jmp    L8
L160:
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rax,%rdx
  mov    -0x20(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0x20(%rbp)
L8:
  mov    -0x20(%rbp),%eax
  cmp    -0x18(%rbp),%eax
  jl     L160
  nop
  leave
  ret
```

assistant: ```c
void blocksum(float *A, float *workspace, int w, int h, int c, float *B) {
  int i, j;
  int y;
  int size;
  float *Q;
  float *N;
  size = w * h;
  memset(workspace, 0, 2 * size * sizeof(float));
  Q = workspace;
  N = workspace + size;
  for (j = 0; j < h; j++) {
    y = j * w;
    for (i = 0; i < c; i++) {
      Q[y] += A[y + i];
    }
  }
  for (j = 0; j < h; j++) {
    y = j * w;
    for (i = 1; i < w; i++) {
      if (y + i + c < size)
        Q[y + i] = Q[y + i - 1] + A[y + i + c - 1] - A[y + i - 1];
      else
        Q[y + i] = Q[y + i - 1] - A[y + i - 1];
    }
  }
  for (i = 0; i < w; i++) {
    for (j = 0; j < c; j++) {
      N[i] += Q[j * w + i];
    }
  }
  for (i = 0; i < w; i++) {
    for (j = 1; j < h; j++) {
      if ((j + c) * w + i < size)
        N[j * w + i] = N[(j - 1) * w + i] + Q[(j + c - 1) * w + i] - Q[(j - 1) * w + i];
      else
        N[j * w + i] = N[(j - 1) * w + i] - Q[(j - 1) * w + i];
    }
  }
  for (i = 0; i < size; i++) {
    B[i] = (float)N[i];
  }
  return;
}
```