user: 下面的汇编指令对应的C源代码是什么:

```asm
<fwd>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rsi,-0x28(%rsp)
  mov    0x60(%rsp),%esi
  mov    %rdi,-0x30(%rsp)
  mov    %rdx,-0x20(%rsp)
  mov    %r8d,0x8(%rsp)
  mov    %r9d,-0x34(%rsp)
  test   %esi,%esi
  jle    L48
  mov    0x70(%rsp),%edi
  imul   0x68(%rsp),%edi
  mov    %rcx,%rbx
  movl   $0x0,0xc(%rsp)
  mov    0x80(%rsp),%esi
  mov    0x80(%rsp),%eax
  mov    0x80(%rsp),%edx
  imul   %edi,%esi
  add    $0x1,%eax
  mov    %edi,%ecx
  mov    %edi,0x24(%rsp)
  sub    $0x1,%edx
  imul   %edx,%ecx
  mov    %esi,-0x38(%rsp)
  mov    %edi,%esi
  imul   %eax,%esi
  imul   0x68(%rsp),%eax
  mov    %ecx,0x14(%rsp)
  mov    0x68(%rsp),%ecx
  imul   0x80(%rsp),%ecx
  mov    %esi,0x10(%rsp)
  mov    %eax,0x1c(%rsp)
  mov    0x68(%rsp),%eax
  mov    %ecx,0x18(%rsp)
  imul   %edx,%eax
  mov    %eax,0x20(%rsp)
  movslq %edi,%rax
  mov    %rax,%rsi
  lea    0x0(,%rax,4),%r13
  neg    %esi
  movslq %esi,%rax
  lea    0x0(,%rax,4),%r12
  movslq 0x68(%rsp),%rax
  lea    0x0(,%rax,4),%r14
  mov    0x68(%rsp),%eax
  neg    %eax
  cltq
  lea    0x0(,%rax,4),%r15
  mov    %edx,%eax
  lea    0x4(,%rax,4),%rbp
  movslq 0x80(%rsp),%rax
  mov    %rax,(%rsp)
  movslq %r8d,%rax
  mov    %rax,-0x70(%rsp)
  mov    %r13,%rax
  mov    %r14,%r13
  mov    %r12,%r14
  mov    %rbp,%r12
  mov    %rax,%rbp
L72:
  mov    -0x34(%rsp),%eax
  test   %eax,%eax
  jle    L12
  mov    0x20(%rsp),%eax
  movl   $0x0,-0x48(%rsp)
  mov    %eax,-0x3c(%rsp)
  mov    0x1c(%rsp),%eax
  mov    %eax,-0x40(%rsp)
  mov    0x18(%rsp),%eax
  mov    %eax,-0x44(%rsp)
  movslq 0x10(%rsp),%rax
  mov    %rax,-0x18(%rsp)
  movslq 0x14(%rsp),%rax
  mov    %rax,-0x10(%rsp)
  movslq -0x38(%rsp),%rax
  mov    %rax,-0x8(%rsp)
  cs nopw 0x0(%rax,%rax,1)
L31:
  mov    0x8(%rsp),%edx
  test   %edx,%edx
  jle    L71
  movslq -0x44(%rsp),%rcx
  mov    -0x38(%rsp),%eax
  xor    %r10d,%r10d
  mov    (%rsp),%rdx
  mov    -0x28(%rsp),%rsi
  add    %ecx,%eax
  mov    -0x18(%rsp),%rdi
  cltq
  add    %rax,%rdx
  shl    $0x2,%rdx
  lea    (%rsi,%rdx,1),%r8
  mov    -0x30(%rsp),%rsi
  lea    (%rsi,%rdx,1),%r11
  lea    (%rdi,%rcx,1),%rsi
  add    -0x10(%rsp),%rcx
  add    -0x20(%rsp),%rdx
  sub    %rax,%rsi
  sub    %rax,%rcx
  mov    %rdx,-0x78(%rsp)
  lea    0x0(,%rsi,4),%rdi
  mov    -0x8(%rsp),%rsi
  mov    %rdi,-0x68(%rsp)
  lea    0x0(,%rcx,4),%rdi
  movslq -0x40(%rsp),%rcx
  mov    %rdi,-0x60(%rsp)
  add    %rsi,%rcx
  sub    %rax,%rcx
  lea    0x0(,%rcx,4),%rdi
  movslq -0x3c(%rsp),%rcx
  mov    %rdi,-0x58(%rsp)
  add    %rsi,%rcx
  sub    %rax,%rcx
  lea    0x0(,%rcx,4),%rax
  mov    %rax,-0x50(%rsp)
  cs nopw 0x0(%rax,%rax,1)
L15:
  movss  (%r8),%xmm1
  mov    0x80(%rsp),%ecx
  movaps %xmm1,%xmm2
  addss  %xmm1,%xmm2
  mulss  (%rbx),%xmm1
  subss  (%r11,%r10,4),%xmm2
  test   %ecx,%ecx
  jle    L39
  mov    -0x68(%rsp),%rax
  lea    (%rax,%r8,1),%rdi
  mov    -0x60(%rsp),%rax
  lea    (%r8,%rax,1),%rsi
  mov    -0x58(%rsp),%rax
  lea    (%r8,%rax,1),%rcx
  mov    -0x50(%rsp),%rax
  lea    (%r8,%rax,1),%rdx
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L1:
  mov    %rax,%r9
  movss  (%rdi),%xmm0
  addss  (%rsi),%xmm0
  add    %rbp,%rdi
  neg    %r9
  addss  (%rcx),%xmm0
  addss  (%rdx),%xmm0
  add    %r14,%rsi
  addss  0x4(%r8,%rax,1),%xmm0
  add    %r13,%rcx
  add    %r15,%rdx
  addss  -0x4(%r8,%r9,1),%xmm0
  mulss  0x4(%rbx,%rax,1),%xmm0
  add    $0x4,%rax
  addss  %xmm0,%xmm1
  cmp    %rax,%r12
  jne    L1
L39:
  mov    -0x78(%rsp),%rax
  add    $0x4,%r8
  mulss  (%rax,%r10,4),%xmm1
  addss  %xmm2,%xmm1
  movss  %xmm1,(%r11,%r10,4)
  add    $0x1,%r10
  cmp    %r10,-0x70(%rsp)
  jne    L15
L71:
  mov    0x68(%rsp),%edi
  addl   $0x1,-0x48(%rsp)
  add    %edi,-0x44(%rsp)
  mov    -0x48(%rsp),%eax
  add    %edi,-0x40(%rsp)
  add    %edi,-0x3c(%rsp)
  cmp    %eax,-0x34(%rsp)
  jne    L31
L12:
  mov    0x24(%rsp),%edx
  addl   $0x1,0xc(%rsp)
  add    %edx,-0x38(%rsp)
  mov    0xc(%rsp),%eax
  add    %edx,0x10(%rsp)
  add    %edx,0x14(%rsp)
  cmp    %eax,0x60(%rsp)
  jne    L72
L48:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void fwd(float *next, float *curr, float *vsq, float *c_coeff, int nx, int ny, int nz, int dimx, int dimy, int dimz, int radius) {
#pragma omp parallel for collapse(3)
  for (int z = 0; z < nz; z++) {
    for (int y = 0; y < ny; y++) {
      for (int x = 0; x < nx; x++) {
        int this_offset = (((radius) + (z)) * (dimy) * (dimx) + ((radius) + (y)) * (dimx) + ((radius) + (x)));
        float temp = 2.0f * curr[this_offset] - next[this_offset];
        float div = c_coeff[0] * curr[this_offset];
        for (int d = 1; d <= radius; d++) {
          int z_pos_offset = (((radius) + (z + d)) * (dimy) * (dimx) + ((radius) + (y)) * (dimx) + ((radius) + (x)));
          int z_neg_offset = (((radius) + (z - d)) * (dimy) * (dimx) + ((radius) + (y)) * (dimx) + ((radius) + (x)));
          int y_pos_offset = (((radius) + (z)) * (dimy) * (dimx) + ((radius) + (y + d)) * (dimx) + ((radius) + (x)));
          int y_neg_offset = (((radius) + (z)) * (dimy) * (dimx) + ((radius) + (y - d)) * (dimx) + ((radius) + (x)));
          int x_pos_offset = (((radius) + (z)) * (dimy) * (dimx) + ((radius) + (y)) * (dimx) + ((radius) + (x + d)));
          int x_neg_offset = (((radius) + (z)) * (dimy) * (dimx) + ((radius) + (y)) * (dimx) + ((radius) + (x - d)));
          div += c_coeff[d] * (curr[z_pos_offset] + curr[z_neg_offset] + curr[y_pos_offset] + curr[y_neg_offset] + curr[x_pos_offset] + curr[x_neg_offset]);
        }
        next[this_offset] = temp + div * vsq[this_offset];
      }
    }
  }
}
```