user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<kernel_strsv_lt_inv_3_lib4>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %edi,%r11d
  mov    0x28(%rsp),%rdi
  cmp    $0x4,%r11d
  jle    L12
  movss  0xc(%r8),%xmm2
  movaps %xmm2,%xmm3
  mulss  0xc(%rsi),%xmm3
  pxor   %xmm0,%xmm0
  movaps %xmm0,%xmm1
  subss  %xmm3,%xmm1
  movaps %xmm2,%xmm3
  mulss  0x1c(%rsi),%xmm3
  movaps %xmm0,%xmm4
  subss  %xmm3,%xmm4
  mulss  0x2c(%rsi),%xmm2
  subss  %xmm2,%xmm0
  shl    $0x2,%edx
  movslq %edx,%rbp
  shl    $0x2,%rbp
  lea    (%rsi,%rbp,1),%rdx
  lea    0x10(%r8),%rbx
  cmp    $0x7,%r11d
  jle    L23
  lea    -0x8(%r11),%r13d
  shr    $0x2,%r13d
  mov    %r13d,%r12d
  lea    0x2(%r12),%rax
  shl    $0x4,%rax
  add    %rax,%r8
  mov    %rbx,%r10
  mov    %rdx,%rax
L51:
  movss  (%r10),%xmm7
  movss  0x4(%r10),%xmm6
  movss  0x8(%r10),%xmm5
  movss  0xc(%r10),%xmm3
  movaps %xmm7,%xmm2
  mulss  (%rax),%xmm2
  subss  %xmm2,%xmm1
  movaps %xmm7,%xmm8
  mulss  0x10(%rax),%xmm8
  subss  %xmm8,%xmm4
  movaps %xmm4,%xmm2
  mulss  0x20(%rax),%xmm7
  subss  %xmm7,%xmm0
  movaps %xmm6,%xmm4
  mulss  0x4(%rax),%xmm4
  subss  %xmm4,%xmm1
  movaps %xmm6,%xmm4
  mulss  0x14(%rax),%xmm4
  subss  %xmm4,%xmm2
  mulss  0x24(%rax),%xmm6
  subss  %xmm6,%xmm0
  movaps %xmm5,%xmm4
  mulss  0x8(%rax),%xmm4
  subss  %xmm4,%xmm1
  movaps %xmm5,%xmm4
  mulss  0x18(%rax),%xmm4
  subss  %xmm4,%xmm2
  mulss  0x28(%rax),%xmm5
  subss  %xmm5,%xmm0
  movaps %xmm3,%xmm4
  mulss  0xc(%rax),%xmm4
  subss  %xmm4,%xmm1
  movaps %xmm3,%xmm5
  mulss  0x1c(%rax),%xmm5
  subss  %xmm5,%xmm2
  movaps %xmm2,%xmm4
  mulss  0x2c(%rax),%xmm3
  subss  %xmm3,%xmm0
  add    %rbp,%rax
  add    $0x10,%r10
  cmp    %r8,%r10
  jne    L51
  add    $0x1,%r12
  imul   %r12,%rbp
  add    %rbp,%rdx
  shl    $0x4,%r12
  add    %r12,%rbx
  lea    0x8(,%r13,4),%eax
  jmp    L8
L12:
  lea    0xc(%rsi),%rdx
  lea    0x4(%r8),%rbx
  pxor   %xmm0,%xmm0
  movaps %xmm0,%xmm4
  movaps %xmm0,%xmm1
  mov    $0x3,%eax
L8:
  cmp    %eax,%r11d
  jle    L60
L57:
  movss  (%rbx),%xmm2
  movaps %xmm2,%xmm3
  mulss  (%rdx),%xmm3
  subss  %xmm3,%xmm1
  movaps %xmm2,%xmm3
  mulss  0x10(%rdx),%xmm3
  subss  %xmm3,%xmm4
  mulss  0x20(%rdx),%xmm2
  subss  %xmm2,%xmm0
  add    $0x4,%rdx
  add    $0x4,%rbx
  add    $0x1,%eax
  cmp    %eax,%r11d
  jg     L57
L60:
  addss  (%r9),%xmm1
  addss  0x4(%r9),%xmm4
  addss  0x8(%r9),%xmm0
  mulss  0x8(%rcx),%xmm0
  movss  %xmm0,0x8(%rdi)
  movaps %xmm0,%xmm3
  mulss  0x8(%rsi),%xmm3
  subss  %xmm3,%xmm1
  mulss  0x18(%rsi),%xmm0
  movaps %xmm0,%xmm3
  movaps %xmm4,%xmm0
  subss  %xmm3,%xmm0
  mulss  0x4(%rcx),%xmm0
  movss  %xmm0,0x4(%rdi)
  mulss  0x4(%rsi),%xmm0
  subss  %xmm0,%xmm1
  mulss  (%rcx),%xmm1
  movss  %xmm1,(%rdi)
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L23:
  mov    $0x4,%eax
  jmp    L57
```

assistant: ```c
void kernel_strsv_lt_inv_3_lib4(int kmax, float *A, int sda, float *inv_diag_A, float *x, float *y, float *z) {
  const int bs = 4;
  int k;
  float *tA, *tx;
  tA = A;
  tx = x;
  float x_0, x_1, x_2, x_3, y_0 = 0, y_1 = 0, y_2 = 0;
  k = 3;
  if (kmax > 4) {
    x_3 = x[3];
    y_0 -= A[3 + bs * 0] * x_3;
    y_1 -= A[3 + bs * 1] * x_3;
    y_2 -= A[3 + bs * 2] * x_3;
    k = 4;
    A += 4 + (sda - 1) * bs;
    x += 4;
    for (; k < kmax - 3; k += 4) {
      x_0 = x[0];
      x_1 = x[1];
      x_2 = x[2];
      x_3 = x[3];
      y_0 -= A[0 + bs * 0] * x_0;
      y_1 -= A[0 + bs * 1] * x_0;
      y_2 -= A[0 + bs * 2] * x_0;
      y_0 -= A[1 + bs * 0] * x_1;
      y_1 -= A[1 + bs * 1] * x_1;
      y_2 -= A[1 + bs * 2] * x_1;
      y_0 -= A[2 + bs * 0] * x_2;
      y_1 -= A[2 + bs * 1] * x_2;
      y_2 -= A[2 + bs * 2] * x_2;
      y_0 -= A[3 + bs * 0] * x_3;
      y_1 -= A[3 + bs * 1] * x_3;
      y_2 -= A[3 + bs * 2] * x_3;
      A += sda * bs;
      x += 4;
    }
  } else {
    A += 3;
    x += 1;
  }
  for (; k < kmax; k++) {
    x_0 = x[0];
    y_0 -= A[0 + bs * 0] * x_0;
    y_1 -= A[0 + bs * 1] * x_0;
    y_2 -= A[0 + bs * 2] * x_0;
    A += 1;
    x += 1;
  }
  y_0 = y[0] + y_0;
  y_1 = y[1] + y_1;
  y_2 = y[2] + y_2;
  A = tA;
  x = tx;
  y_2 *= inv_diag_A[2];
  z[2] = y_2;
  y_0 -= A[2 + bs * 0] * y_2;
  y_1 -= A[2 + bs * 1] * y_2;
  y_1 *= inv_diag_A[1];
  z[1] = y_1;
  y_0 -= A[1 + bs * 0] * y_1;
  y_0 *= inv_diag_A[0];
  z[0] = y_0;
}
```