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    $0x20,%rsp
  mov    %r9d,0x14(%rsp)
  mov    0x68(%rsp),%r15d
  test   %r9d,%r9d
  jle    L60
  mov    %r8d,%r10d
  test   %r8d,%r8d
  jle    L60
  mov    %rcx,%rbp
  mov    0x58(%rsp),%ecx
  mov    %rdi,%rax
  lea    -0x1(%r15),%edi
  mov    %edi,-0x2c(%rsp)
  imul   0x58(%rsp),%edi
  movslq %r15d,%r11
  mov    %rsi,%r12
  imul   %r15d,%ecx
  mov    0x58(%rsp),%ebx
  mov    %rdx,%rsi
  lea    0x1(%r15),%edx
  mov    %r11,0x8(%rsp)
  mov    %edi,-0x4(%rsp)
  imul   %edx,%ebx
  movslq 0x58(%rsp),%rdx
  movslq %ecx,%rdi
  movl   $0x0,-0x30(%rsp)
  lea    (%r11,%rdi,1),%r8
  lea    0x0(,%rdx,4),%r13
  mov    %rdx,%r14
  shl    $0x2,%r8
  sub    %ebx,%ecx
  mov    %ebx,-0x8(%rsp)
  shl    $0x4,%r14
  add    %r8,%rax
  add    %r8,%rsi
  mov    %ecx,0x10(%rsp)
  mov    %r13,%r8
  mov    %rax,-0x68(%rsp)
  lea    0x1(%r11,%rdi,1),%rax
  neg    %r8
  lea    (%r12,%rax,4),%rax
  mov    %rsi,-0x40(%rsp)
  mov    %rax,(%rsp)
  lea    0x0(,%rdx,8),%rax
  neg    %rdx
  mov    %rax,-0x20(%rsp)
  lea    0x0(,%rdx,8),%rax
  mov    %rax,-0x18(%rsp)
  mov    %r15d,%eax
  shr    $0x2,%eax
  sub    $0x1,%eax
  add    $0x1,%rax
  shl    $0x4,%rax
  mov    %rax,-0x28(%rsp)
  mov    %r15d,%eax
  and    $0xfffffffc,%eax
  mov    %eax,-0x10(%rsp)
  add    $0x1,%eax
  mov    %eax,-0xc(%rsp)
  movslq %r10d,%rax
  mov    %rax,-0x38(%rsp)
  nopl   0x0(%rax)
L30:
  movslq -0x8(%rsp),%rax
  mov    0x10(%rsp),%ebx
  mov    (%rsp),%r11
  add    %eax,%ebx
  mov    %ebx,-0x50(%rsp)
  mov    0x8(%rsp),%rbx
  add    %rbx,%rax
  lea    (%r12,%rax,4),%rax
  mov    %rax,-0x60(%rsp)
  movslq -0x4(%rsp),%rax
  add    %rbx,%rax
  xor    %ebx,%ebx
  lea    (%r12,%rax,4),%rax
  mov    %rax,-0x58(%rsp)
  nopw   0x0(%rax,%rax,1)
L5:
  movss  -0x4(%r11),%xmm1
  lea    (%r15,%rbx,1),%eax
  mov    %ebx,-0x4c(%rsp)
  mov    %eax,-0x6c(%rsp)
  mov    -0x68(%rsp),%rax
  movaps %xmm1,%xmm3
  addss  %xmm1,%xmm3
  mulss  0x0(%rbp),%xmm1
  subss  (%rax,%rbx,4),%xmm3
  test   %r15d,%r15d
  jle    L18
  cmpl   $0x2,-0x2c(%rsp)
  jbe    L54
  mov    -0x60(%rsp),%rcx
  mov    -0x20(%rsp),%rdi
  lea    -0x14(%r11),%r10
  xor    %eax,%eax
  mov    -0x58(%rsp),%rdx
  mov    -0x18(%rsp),%rsi
  mov    %rbx,-0x48(%rsp)
  mov    -0x28(%rsp),%rbx
  add    %rcx,%rdi
  add    %rdx,%rsi
  cs nopw 0x0(%rax,%rax,1)
L108:
  movss  (%rsi,%r8,1),%xmm0
  movss  (%rsi),%xmm4
  mov    %rax,%r9
  sub    %r14,%rsi
  movss  (%rdx,%r8,1),%xmm5
  movss  (%rcx,%r13,1),%xmm6
  neg    %r9
  unpcklps %xmm0,%xmm4
  movss  (%rdx),%xmm0
  movups (%r11,%rax,1),%xmm7
  sub    %r14,%rdx
  movups (%r10,%r9,1),%xmm2
  unpcklps %xmm5,%xmm0
  movss  (%rdi),%xmm5
  movlhps %xmm4,%xmm0
  movss  (%rdi,%r13,1),%xmm4
  shufps $0x1b,%xmm2,%xmm2
  add    %r14,%rdi
  unpcklps %xmm4,%xmm5
  movss  (%rcx),%xmm4
  add    %r14,%rcx
  unpcklps %xmm6,%xmm4
  movups 0x4(%rbp,%rax,1),%xmm6
  add    $0x10,%rax
  movlhps %xmm5,%xmm4
  addps  %xmm4,%xmm0
  addps  %xmm7,%xmm0
  addps  %xmm2,%xmm0
  mulps  %xmm6,%xmm0
  addss  %xmm0,%xmm1
  movaps %xmm0,%xmm2
  shufps $0x55,%xmm0,%xmm2
  addss  %xmm1,%xmm2
  movaps %xmm0,%xmm1
  unpckhps %xmm0,%xmm1
  shufps $0xff,%xmm0,%xmm0
  addss  %xmm2,%xmm1
  addss  %xmm0,%xmm1
  cmp    %rax,%rbx
  jne    L108
  mov    -0x48(%rsp),%rbx
  cmp    %r15d,-0x10(%rsp)
  je     L18
  mov    -0xc(%rsp),%eax
L27:
  mov    -0x30(%rsp),%r10d
  mov    -0x6c(%rsp),%r9d
  movslq %eax,%rsi
  lea    0x0(,%rsi,4),%rdi
  mov    %r10d,%edx
  lea    (%r10,%rax,1),%ecx
  sub    %eax,%edx
  add    %r15d,%ecx
  add    %r15d,%edx
  imul   0x58(%rsp),%ecx
  imul   0x58(%rsp),%edx
  add    %r9d,%ecx
  add    %r9d,%edx
  mov    -0x4c(%rsp),%r9d
  movslq %ecx,%rcx
  movslq %edx,%rdx
  movss  (%r12,%rcx,4),%xmm0
  mov    -0x50(%rsp),%ecx
  addss  (%r12,%rdx,4),%xmm0
  lea    (%r9,%rax,1),%edx
  add    %r15d,%edx
  add    %ecx,%edx
  movslq %edx,%rdx
  addss  (%r12,%rdx,4),%xmm0
  mov    %r9d,%edx
  sub    %eax,%edx
  add    %r15d,%edx
  add    %ecx,%edx
  movslq %edx,%rdx
  addss  (%r12,%rdx,4),%xmm0
  mulss  0x0(%rbp,%rsi,4),%xmm0
  lea    0x1(%rax),%esi
  addss  %xmm0,%xmm1
  cmp    %esi,%r15d
  jl     L18
  mov    %r10d,%ecx
  lea    (%rsi,%r10,1),%edx
  add    $0x2,%eax
  sub    %esi,%ecx
  add    %r15d,%edx
  add    %r15d,%ecx
  imul   0x58(%rsp),%edx
  add    -0x6c(%rsp),%edx
  imul   0x58(%rsp),%ecx
  add    -0x6c(%rsp),%ecx
  movslq %edx,%rdx
  movslq %ecx,%rcx
  movss  (%r12,%rcx,4),%xmm0
  mov    -0x50(%rsp),%ecx
  addss  (%r12,%rdx,4),%xmm0
  lea    (%rsi,%r9,1),%edx
  add    %r15d,%edx
  add    %ecx,%edx
  movslq %edx,%rdx
  addss  (%r12,%rdx,4),%xmm0
  mov    %r9d,%edx
  sub    %esi,%edx
  mov    %ecx,%esi
  add    %r15d,%edx
  add    %ecx,%edx
  movslq %edx,%rdx
  addss  (%r12,%rdx,4),%xmm0
  mulss  0x4(%rbp,%rdi,1),%xmm0
  addss  %xmm0,%xmm1
  cmp    %eax,%r15d
  jl     L18
  mov    %r10d,%ecx
  lea    (%r10,%rax,1),%edx
  sub    %eax,%ecx
  add    %r15d,%edx
  add    %r15d,%ecx
  imul   0x58(%rsp),%edx
  add    -0x6c(%rsp),%edx
  imul   0x58(%rsp),%ecx
  add    -0x6c(%rsp),%ecx
  movslq %edx,%rdx
  movslq %ecx,%rcx
  movss  (%r12,%rcx,4),%xmm0
  addss  (%r12,%rdx,4),%xmm0
  lea    (%r9,%rax,1),%edx
  sub    %eax,%r9d
  add    %r15d,%edx
  lea    (%r9,%r15,1),%eax
  add    %esi,%edx
  add    %esi,%eax
  movslq %edx,%rdx
  cltq
  addss  (%r12,%rdx,4),%xmm0
  addss  (%r12,%rax,4),%xmm0
  mulss  0x8(%rbp,%rdi,1),%xmm0
  addss  %xmm0,%xmm1
L18:
  mov    -0x40(%rsp),%rax
  addq   $0x4,-0x60(%rsp)
  add    $0x4,%r11
  addq   $0x4,-0x58(%rsp)
  mulss  (%rax,%rbx,4),%xmm1
  mov    -0x68(%rsp),%rax
  addss  %xmm3,%xmm1
  movss  %xmm1,(%rax,%rbx,4)
  add    $0x1,%rbx
  cmp    -0x38(%rsp),%rbx
  jne    L5
  mov    0x58(%rsp),%edi
  addl   $0x1,-0x30(%rsp)
  add    %edi,-0x8(%rsp)
  mov    -0x30(%rsp),%eax
  add    %edi,-0x4(%rsp)
  add    %r13,-0x40(%rsp)
  add    %r13,-0x68(%rsp)
  add    %r13,(%rsp)
  cmp    %eax,0x14(%rsp)
  jne    L30
L60:
  add    $0x20,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L54:
  mov    $0x1,%eax
  jmp    L27
```

assistant: ```c
void fwd(float *next, float *curr, float *vsq, float *c_coeff, int nx, int ny, int dimx, int dimy, int radius) {
#pragma acc parallel present(next [0:dimx * dimy], curr [0:dimx * dimy], vsq [0:dimx * dimy], c_coeff [0:NUM_COEFF])
#pragma acc loop collapse(2) gang worker vector
  for (int y = 0; y < ny; y++) {
    for (int x = 0; x < nx; x++) {
      int this_offset = (((radius) + (y)) * (dimx) + ((radius) + (x)));
      float temp = 2.0f * curr[this_offset] - next[this_offset];
      float div = c_coeff[0] * curr[this_offset];
#pragma acc loop seq
      for (int d = 1; d <= radius; d++) {
        int y_pos_offset = (((radius) + (y + d)) * (dimx) + ((radius) + (x)));
        int y_neg_offset = (((radius) + (y - d)) * (dimx) + ((radius) + (x)));
        int x_pos_offset = (((radius) + (y)) * (dimx) + ((radius) + (x + d)));
        int x_neg_offset = (((radius) + (y)) * (dimx) + ((radius) + (x - d)));
        div += c_coeff[d] * (curr[y_pos_offset] + curr[y_neg_offset] + curr[x_pos_offset] + curr[x_neg_offset]);
      }
      next[this_offset] = temp + div * vsq[this_offset];
    }
  }
}
```