user: What is the c source code of the assembly code below:

```asm
<kernel_strmm_nt_4x4_lib4>:
  endbr64
  movss  (%rdx),%xmm1
  movss  0x4(%rsi),%xmm4
  pxor   %xmm0,%xmm0
  mov    %rsi,%rax
  movss  0x14(%rsi),%xmm8
  movss  0x10(%rdx),%xmm5
  add    $0x40,%rax
  mulss  %xmm1,%xmm4
  movss  (%rsi),%xmm10
  movss  0x10(%rsi),%xmm9
  movaps %xmm8,%xmm14
  movss  0x18(%rsi),%xmm7
  movss  0x14(%rdx),%xmm2
  mulss  %xmm5,%xmm14
  movss  0x1c(%rsi),%xmm6
  movaps %xmm9,%xmm15
  movss  0x8(%rsi),%xmm3
  mulss  %xmm1,%xmm10
  movaps %xmm7,%xmm13
  movss  0x28(%rdx),%xmm12
  mulss  %xmm5,%xmm15
  addss  %xmm0,%xmm4
  mulss  %xmm5,%xmm13
  mulss  %xmm2,%xmm9
  mulss  %xmm6,%xmm5
  addss  %xmm4,%xmm14
  movss  0x20(%rsi),%xmm4
  mulss  %xmm2,%xmm8
  addss  %xmm0,%xmm10
  mulss  %xmm2,%xmm7
  mulss  %xmm2,%xmm6
  movss  0x20(%rdx),%xmm2
  movaps %xmm4,%xmm11
  mulss  %xmm1,%xmm3
  addss  %xmm10,%xmm15
  movss  0x24(%rsi),%xmm10
  addss  %xmm0,%xmm9
  mulss  %xmm2,%xmm11
  mulss  0xc(%rsi),%xmm1
  addss  %xmm0,%xmm8
  addss  %xmm0,%xmm7
  addss  %xmm0,%xmm6
  addss  %xmm0,%xmm3
  addss  %xmm15,%xmm11
  movaps %xmm10,%xmm15
  mulss  %xmm2,%xmm15
  addss  %xmm0,%xmm1
  addss  %xmm3,%xmm13
  movss  0x28(%rsi),%xmm3
  movd   %xmm11,%r9d
  movaps %xmm4,%xmm11
  addss  %xmm1,%xmm5
  movss  0x24(%rdx),%xmm1
  mulss  %xmm12,%xmm4
  addss  %xmm14,%xmm15
  mulss  %xmm1,%xmm11
  movaps %xmm3,%xmm14
  mulss  %xmm2,%xmm14
  mulss  -0x14(%rax),%xmm2
  movd   %xmm15,%r8d
  movaps %xmm10,%xmm15
  addss  %xmm0,%xmm4
  mulss  %xmm1,%xmm15
  addss  %xmm9,%xmm11
  mulss  %xmm12,%xmm10
  addss  %xmm13,%xmm14
  movss  -0x14(%rax),%xmm13
  addss  %xmm5,%xmm2
  movups -0x10(%rax),%xmm5
  mulss  %xmm12,%xmm13
  movd   %xmm14,%esi
  movaps %xmm3,%xmm14
  addss  %xmm8,%xmm15
  movups 0x30(%rdx),%xmm8
  mulss  %xmm1,%xmm14
  addss  %xmm0,%xmm10
  mulss  -0x14(%rax),%xmm1
  movaps %xmm8,%xmm9
  mulss  %xmm12,%xmm3
  shufps $0x0,%xmm8,%xmm9
  movaps %xmm8,%xmm12
  mulps  %xmm5,%xmm9
  shufps $0x55,%xmm8,%xmm12
  addss  %xmm0,%xmm13
  movd   %xmm10,%r10d
  mulps  %xmm5,%xmm12
  movaps %xmm8,%xmm10
  addss  %xmm7,%xmm14
  movd   %esi,%xmm7
  shufps $0xaa,%xmm8,%xmm10
  addss  %xmm6,%xmm1
  movd   %r9d,%xmm6
  unpcklps %xmm2,%xmm7
  addss  %xmm0,%xmm3
  mulps  %xmm5,%xmm10
  movd   %xmm1,%r11d
  movd   %r8d,%xmm1
  unpcklps %xmm1,%xmm6
  movd   %r11d,%xmm1
  movlhps %xmm7,%xmm6
  movaps %xmm14,%xmm7
  addps  %xmm6,%xmm9
  movaps %xmm11,%xmm6
  unpcklps %xmm1,%xmm7
  unpcklps %xmm15,%xmm6
  movd   %r10d,%xmm1
  movlhps %xmm7,%xmm6
  movaps %xmm3,%xmm7
  addps  %xmm6,%xmm12
  movaps %xmm4,%xmm6
  unpcklps %xmm13,%xmm7
  unpcklps %xmm1,%xmm6
  movd   %r9d,%xmm1
  movlhps %xmm7,%xmm6
  movaps %xmm8,%xmm7
  unpcklps %xmm1,%xmm11
  shufps $0xff,%xmm8,%xmm7
  mulps  %xmm5,%xmm7
  addps  %xmm6,%xmm10
  pxor   %xmm6,%xmm6
  shufps $0x1b,%xmm8,%xmm8
  movaps %xmm0,%xmm1
  unpcklps %xmm4,%xmm1
  movaps %xmm1,%xmm4
  movd   %r8d,%xmm1
  movlhps %xmm11,%xmm4
  unpcklps %xmm1,%xmm15
  movd   %r10d,%xmm1
  addps  %xmm6,%xmm7
  movaps %xmm5,%xmm6
  lea    0x40(%rdx),%r10
  shufps $0x0,%xmm5,%xmm6
  mulps  %xmm8,%xmm6
  addps  %xmm4,%xmm6
  movaps %xmm5,%xmm4
  shufps $0x55,%xmm5,%xmm4
  mulps  %xmm8,%xmm4
  movaps %xmm6,-0x18(%rsp)
  movaps %xmm0,%xmm6
  unpcklps %xmm1,%xmm6
  movd   %esi,%xmm1
  movlhps %xmm15,%xmm6
  unpcklps %xmm1,%xmm14
  movd   %r11d,%xmm1
  addps  %xmm6,%xmm4
  movaps %xmm0,%xmm6
  unpcklps %xmm2,%xmm1
  unpcklps %xmm3,%xmm6
  unpcklps %xmm13,%xmm0
  movaps %xmm6,%xmm3
  movlhps %xmm1,%xmm0
  movaps %xmm4,-0x28(%rsp)
  movaps %xmm5,%xmm4
  movlhps %xmm14,%xmm3
  shufps $0xaa,%xmm5,%xmm4
  shufps $0xff,%xmm5,%xmm5
  mulps  %xmm8,%xmm4
  mulps  %xmm8,%xmm5
  addps  %xmm3,%xmm4
  addps  %xmm0,%xmm5
  movaps %xmm4,-0x38(%rsp)
  movaps %xmm5,-0x48(%rsp)
  cmp    $0x7,%edi
  jle    L18
  lea    -0x8(%rdi),%r11d
  mov    %rax,%r8
  shr    $0x2,%r11d
  mov    %r11d,%r9d
  lea    0x2(%r9),%rsi
  shl    $0x6,%rsi
  add    %rsi,%rdx
  mov    %r10,%rsi
  nopl   0x0(%rax)
L63:
  movups (%rsi),%xmm6
  movups (%r8),%xmm0
  add    $0x40,%rsi
  add    $0x40,%r8
  movups -0x30(%rsi),%xmm5
  movups -0x30(%r8),%xmm3
  movaps %xmm6,%xmm11
  movups -0x20(%rsi),%xmm4
  movups -0x20(%r8),%xmm2
  movaps %xmm6,%xmm15
  shufps $0x0,%xmm6,%xmm11
  mulps  %xmm0,%xmm11
  movups -0x10(%rsi),%xmm8
  movups -0x10(%r8),%xmm1
  shufps $0x1b,%xmm6,%xmm15
  movaps %xmm5,%xmm14
  movaps %xmm4,%xmm13
  shufps $0x1b,%xmm5,%xmm14
  shufps $0x1b,%xmm4,%xmm13
  addps  %xmm9,%xmm11
  movaps %xmm5,%xmm9
  shufps $0x0,%xmm5,%xmm9
  mulps  %xmm3,%xmm9
  addps  %xmm9,%xmm11
  movaps %xmm4,%xmm9
  shufps $0x0,%xmm4,%xmm9
  mulps  %xmm2,%xmm9
  addps  %xmm9,%xmm11
  movaps %xmm8,%xmm9
  shufps $0x0,%xmm8,%xmm9
  mulps  %xmm1,%xmm9
  addps  %xmm11,%xmm9
  movaps %xmm6,%xmm11
  shufps $0x55,%xmm6,%xmm11
  mulps  %xmm0,%xmm11
  addps  %xmm12,%xmm11
  movaps %xmm5,%xmm12
  shufps $0x55,%xmm5,%xmm12
  mulps  %xmm3,%xmm12
  addps  %xmm12,%xmm11
  movaps %xmm4,%xmm12
  shufps $0x55,%xmm4,%xmm12
  mulps  %xmm2,%xmm12
  addps  %xmm12,%xmm11
  movaps %xmm8,%xmm12
  shufps $0x55,%xmm8,%xmm12
  mulps  %xmm1,%xmm12
  addps  %xmm11,%xmm12
  movaps %xmm6,%xmm11
  shufps $0xaa,%xmm6,%xmm11
  mulps  %xmm0,%xmm11
  shufps $0xff,%xmm6,%xmm6
  mulps  %xmm0,%xmm6
  addps  %xmm11,%xmm10
  movaps %xmm5,%xmm11
  shufps $0xaa,%xmm5,%xmm11
  mulps  %xmm3,%xmm11
  shufps $0xff,%xmm5,%xmm5
  addps  %xmm7,%xmm6
  mulps  %xmm3,%xmm5
  movaps %xmm8,%xmm7
  shufps $0xff,%xmm8,%xmm7
  mulps  %xmm1,%xmm7
  addps  %xmm11,%xmm10
  movaps %xmm4,%xmm11
  addps  %xmm5,%xmm6
  shufps $0xaa,%xmm4,%xmm11
  shufps $0xff,%xmm4,%xmm4
  movaps %xmm4,%xmm5
  mulps  %xmm2,%xmm5
  movaps %xmm0,%xmm4
  shufps $0x0,%xmm0,%xmm4
  mulps  %xmm15,%xmm4
  addps  -0x18(%rsp),%xmm4
  mulps  %xmm2,%xmm11
  addps  %xmm6,%xmm5
  addps  %xmm11,%xmm10
  movaps %xmm8,%xmm11
  addps  %xmm5,%xmm7
  movaps %xmm3,%xmm5
  shufps $0xaa,%xmm8,%xmm11
  shufps $0x1b,%xmm8,%xmm8
  shufps $0x0,%xmm3,%xmm5
  mulps  %xmm14,%xmm5
  mulps  %xmm1,%xmm11
  addps  %xmm5,%xmm4
  movaps %xmm2,%xmm5
  shufps $0x0,%xmm2,%xmm5
  mulps  %xmm13,%xmm5
  addps  %xmm11,%xmm10
  addps  %xmm5,%xmm4
  movaps %xmm1,%xmm5
  shufps $0x0,%xmm1,%xmm5
  mulps  %xmm8,%xmm5
  addps  %xmm5,%xmm4
  movaps %xmm3,%xmm5
  shufps $0x55,%xmm3,%xmm5
  mulps  %xmm14,%xmm5
  movaps %xmm4,-0x18(%rsp)
  movaps %xmm0,%xmm4
  shufps $0x55,%xmm0,%xmm4
  mulps  %xmm15,%xmm4
  addps  -0x28(%rsp),%xmm4
  addps  %xmm5,%xmm4
  movaps %xmm2,%xmm5
  shufps $0x55,%xmm2,%xmm5
  mulps  %xmm13,%xmm5
  addps  %xmm5,%xmm4
  movaps %xmm1,%xmm5
  shufps $0x55,%xmm1,%xmm5
  mulps  %xmm8,%xmm5
  addps  %xmm5,%xmm4
  movaps %xmm3,%xmm5
  shufps $0xaa,%xmm3,%xmm5
  mulps  %xmm14,%xmm5
  shufps $0xff,%xmm3,%xmm3
  mulps  %xmm14,%xmm3
  movaps %xmm4,-0x28(%rsp)
  movaps %xmm0,%xmm4
  shufps $0xaa,%xmm0,%xmm4
  mulps  %xmm15,%xmm4
  shufps $0xff,%xmm0,%xmm0
  addps  -0x38(%rsp),%xmm4
  mulps  %xmm15,%xmm0
  addps  -0x48(%rsp),%xmm0
  addps  %xmm5,%xmm4
  movaps %xmm2,%xmm5
  shufps $0xaa,%xmm2,%xmm5
  mulps  %xmm13,%xmm5
  shufps $0xff,%xmm2,%xmm2
  addps  %xmm0,%xmm3
  mulps  %xmm13,%xmm2
  addps  %xmm5,%xmm4
  movaps %xmm1,%xmm5
  shufps $0xaa,%xmm1,%xmm5
  shufps $0xff,%xmm1,%xmm1
  mulps  %xmm8,%xmm5
  addps  %xmm3,%xmm2
  mulps  %xmm8,%xmm1
  addps  %xmm5,%xmm4
  addps  %xmm1,%xmm2
  movaps %xmm4,-0x38(%rsp)
  movaps %xmm2,-0x48(%rsp)
  cmp    %rsi,%rdx
  jne    L63
  lea    0x1(%r9),%rdx
  shl    $0x6,%rdx
  add    %rdx,%rax
  add    %rdx,%r10
  lea    0x8(,%r11,4),%edx
L50:
  cmp    %edx,%edi
  jle    L49
  movups (%rax),%xmm3
  movups (%r10),%xmm4
  sub    %edx,%edi
  movaps %xmm3,%xmm2
  movaps %xmm3,%xmm0
  movaps %xmm3,%xmm1
  shufps $0x1b,%xmm4,%xmm4
  shufps $0xff,%xmm3,%xmm2
  shufps $0xaa,%xmm3,%xmm0
  shufps $0x55,%xmm3,%xmm1
  shufps $0x0,%xmm3,%xmm3
  mulps  %xmm4,%xmm2
  movaps %xmm3,%xmm9
  mulps  %xmm4,%xmm0
  addps  -0x48(%rsp),%xmm2
  mulps  %xmm4,%xmm1
  addps  -0x38(%rsp),%xmm0
  mulps  %xmm4,%xmm9
  addps  -0x28(%rsp),%xmm1
  addps  -0x18(%rsp),%xmm9
  cmp    $0x1,%edi
  je     L19
  movups 0x10(%rax),%xmm3
  movups 0x10(%r10),%xmm4
  movaps %xmm3,%xmm5
  shufps $0x1b,%xmm4,%xmm4
  shufps $0xff,%xmm3,%xmm5
  mulps  %xmm4,%xmm5
  addps  %xmm5,%xmm2
  movaps %xmm3,%xmm5
  shufps $0xaa,%xmm3,%xmm5
  mulps  %xmm4,%xmm5
  addps  %xmm5,%xmm0
  movaps %xmm3,%xmm5
  shufps $0x55,%xmm3,%xmm5
  shufps $0x0,%xmm3,%xmm3
  mulps  %xmm4,%xmm5
  mulps  %xmm4,%xmm3
  addps  %xmm5,%xmm1
  addps  %xmm3,%xmm9
  cmp    $0x2,%edi
  je     L19
  movups 0x20(%rax),%xmm3
  movups 0x20(%r10),%xmm4
  movaps %xmm3,%xmm5
  shufps $0x1b,%xmm4,%xmm4
  shufps $0xff,%xmm3,%xmm5
  mulps  %xmm4,%xmm5
  addps  %xmm5,%xmm2
  movaps %xmm3,%xmm5
  shufps $0xaa,%xmm3,%xmm5
  mulps  %xmm4,%xmm5
  addps  %xmm5,%xmm0
  movaps %xmm3,%xmm5
  shufps $0x55,%xmm3,%xmm5
  shufps $0x0,%xmm3,%xmm3
  mulps  %xmm4,%xmm5
  mulps  %xmm4,%xmm3
  addps  %xmm5,%xmm1
  addps  %xmm3,%xmm9
  cmp    $0x3,%edi
  je     L19
  movups 0x30(%rax),%xmm3
  movups 0x30(%r10),%xmm4
  movaps %xmm3,%xmm5
  shufps $0x1b,%xmm4,%xmm4
  shufps $0xff,%xmm3,%xmm5
  mulps  %xmm4,%xmm5
  addps  %xmm5,%xmm2
  movaps %xmm3,%xmm5
  shufps $0xaa,%xmm3,%xmm5
  mulps  %xmm4,%xmm5
  addps  %xmm5,%xmm0
  movaps %xmm3,%xmm5
  shufps $0x55,%xmm3,%xmm5
  shufps $0x0,%xmm3,%xmm3
  mulps  %xmm4,%xmm5
  mulps  %xmm4,%xmm3
  addps  %xmm5,%xmm1
  addps  %xmm3,%xmm9
L19:
  movaps %xmm9,%xmm7
  movaps %xmm0,%xmm3
  movaps %xmm9,%xmm10
  unpcklps %xmm2,%xmm3
  unpcklps %xmm1,%xmm7
  movaps %xmm2,%xmm5
  shufps $0x55,%xmm9,%xmm10
  movlhps %xmm3,%xmm7
  movaps %xmm1,%xmm3
  shufps $0x55,%xmm2,%xmm5
  movaps %xmm9,%xmm12
  shufps $0x55,%xmm1,%xmm3
  movaps %xmm3,%xmm4
  movaps %xmm0,%xmm3
  unpckhps %xmm9,%xmm12
  unpcklps %xmm4,%xmm10
  shufps $0x55,%xmm0,%xmm3
  unpcklps %xmm5,%xmm3
  movaps %xmm2,%xmm5
  movlhps %xmm3,%xmm10
  movaps %xmm1,%xmm3
  unpckhps %xmm2,%xmm5
  shufps $0xff,%xmm9,%xmm9
  unpckhps %xmm1,%xmm3
  shufps $0xff,%xmm2,%xmm2
  shufps $0xff,%xmm1,%xmm1
  unpcklps %xmm1,%xmm9
  movaps %xmm3,%xmm4
  movaps %xmm0,%xmm3
  unpckhps %xmm0,%xmm3
  unpcklps %xmm4,%xmm12
  shufps $0xff,%xmm0,%xmm0
  unpcklps %xmm2,%xmm0
  unpcklps %xmm5,%xmm3
  movlhps %xmm0,%xmm9
  movlhps %xmm3,%xmm12
L49:
  movups %xmm9,(%rcx)
  movups %xmm12,0x10(%rcx)
  movups %xmm10,0x20(%rcx)
  movups %xmm7,0x30(%rcx)
  ret
  nopl   0x0(%rax)
L18:
  mov    $0x4,%edx
  jmp    L50
```

assistant: ```c
void kernel_strmm_nt_4x4_lib4(int kadd, float *A, float *B, float *C) {
  const int bs = 4;
  const int lda = bs;
  const int ldc = bs;
  int k;
  float a_0, a_1, a_2, a_3, b_0, b_1, b_2, b_3, c_00 = 0, c_01 = 0, c_02 = 0, c_03 = 0, c_10 = 0, c_11 = 0, c_12 = 0, c_13 = 0, c_20 = 0, c_21 = 0, c_22 = 0, c_23 = 0, c_30 = 0, c_31 = 0, c_32 = 0, c_33 = 0;
  a_0 = A[0 + lda * 0];
  a_1 = A[1 + lda * 0];
  a_2 = A[2 + lda * 0];
  a_3 = A[3 + lda * 0];
  b_0 = B[0 + lda * 0];
  c_00 += a_0 * b_0;
  c_10 += a_1 * b_0;
  c_20 += a_2 * b_0;
  c_30 += a_3 * b_0;
  a_0 = A[0 + lda * 1];
  a_1 = A[1 + lda * 1];
  a_2 = A[2 + lda * 1];
  a_3 = A[3 + lda * 1];
  b_0 = B[0 + lda * 1];
  b_1 = B[1 + lda * 1];
  c_00 += a_0 * b_0;
  c_10 += a_1 * b_0;
  c_20 += a_2 * b_0;
  c_30 += a_3 * b_0;
  c_01 += a_0 * b_1;
  c_11 += a_1 * b_1;
  c_21 += a_2 * b_1;
  c_31 += a_3 * b_1;
  a_0 = A[0 + lda * 2];
  a_1 = A[1 + lda * 2];
  a_2 = A[2 + lda * 2];
  a_3 = A[3 + lda * 2];
  b_0 = B[0 + lda * 2];
  b_1 = B[1 + lda * 2];
  b_2 = B[2 + lda * 2];
  c_00 += a_0 * b_0;
  c_10 += a_1 * b_0;
  c_20 += a_2 * b_0;
  c_30 += a_3 * b_0;
  c_01 += a_0 * b_1;
  c_11 += a_1 * b_1;
  c_21 += a_2 * b_1;
  c_31 += a_3 * b_1;
  c_02 += a_0 * b_2;
  c_12 += a_1 * b_2;
  c_22 += a_2 * b_2;
  c_32 += a_3 * b_2;
  a_0 = A[0 + lda * 3];
  a_1 = A[1 + lda * 3];
  a_2 = A[2 + lda * 3];
  a_3 = A[3 + lda * 3];
  b_0 = B[0 + lda * 3];
  b_1 = B[1 + lda * 3];
  b_2 = B[2 + lda * 3];
  b_3 = B[3 + lda * 3];
  c_00 += a_0 * b_0;
  c_10 += a_1 * b_0;
  c_20 += a_2 * b_0;
  c_30 += a_3 * b_0;
  c_01 += a_0 * b_1;
  c_11 += a_1 * b_1;
  c_21 += a_2 * b_1;
  c_31 += a_3 * b_1;
  c_02 += a_0 * b_2;
  c_12 += a_1 * b_2;
  c_22 += a_2 * b_2;
  c_32 += a_3 * b_2;
  c_03 += a_0 * b_3;
  c_13 += a_1 * b_3;
  c_23 += a_2 * b_3;
  c_33 += a_3 * b_3;
  A += 16;
  B += 16;
  for (k = 4; k < kadd - 3; k += 4) {
    a_0 = A[0 + lda * 0];
    a_1 = A[1 + lda * 0];
    a_2 = A[2 + lda * 0];
    a_3 = A[3 + lda * 0];
    b_0 = B[0 + lda * 0];
    b_1 = B[1 + lda * 0];
    b_2 = B[2 + lda * 0];
    b_3 = B[3 + lda * 0];
    c_00 += a_0 * b_0;
    c_10 += a_1 * b_0;
    c_20 += a_2 * b_0;
    c_30 += a_3 * b_0;
    c_01 += a_0 * b_1;
    c_11 += a_1 * b_1;
    c_21 += a_2 * b_1;
    c_31 += a_3 * b_1;
    c_02 += a_0 * b_2;
    c_12 += a_1 * b_2;
    c_22 += a_2 * b_2;
    c_32 += a_3 * b_2;
    c_03 += a_0 * b_3;
    c_13 += a_1 * b_3;
    c_23 += a_2 * b_3;
    c_33 += a_3 * b_3;
    a_0 = A[0 + lda * 1];
    a_1 = A[1 + lda * 1];
    a_2 = A[2 + lda * 1];
    a_3 = A[3 + lda * 1];
    b_0 = B[0 + lda * 1];
    b_1 = B[1 + lda * 1];
    b_2 = B[2 + lda * 1];
    b_3 = B[3 + lda * 1];
    c_00 += a_0 * b_0;
    c_10 += a_1 * b_0;
    c_20 += a_2 * b_0;
    c_30 += a_3 * b_0;
    c_01 += a_0 * b_1;
    c_11 += a_1 * b_1;
    c_21 += a_2 * b_1;
    c_31 += a_3 * b_1;
    c_02 += a_0 * b_2;
    c_12 += a_1 * b_2;
    c_22 += a_2 * b_2;
    c_32 += a_3 * b_2;
    c_03 += a_0 * b_3;
    c_13 += a_1 * b_3;
    c_23 += a_2 * b_3;
    c_33 += a_3 * b_3;
    a_0 = A[0 + lda * 2];
    a_1 = A[1 + lda * 2];
    a_2 = A[2 + lda * 2];
    a_3 = A[3 + lda * 2];
    b_0 = B[0 + lda * 2];
    b_1 = B[1 + lda * 2];
    b_2 = B[2 + lda * 2];
    b_3 = B[3 + lda * 2];
    c_00 += a_0 * b_0;
    c_10 += a_1 * b_0;
    c_20 += a_2 * b_0;
    c_30 += a_3 * b_0;
    c_01 += a_0 * b_1;
    c_11 += a_1 * b_1;
    c_21 += a_2 * b_1;
    c_31 += a_3 * b_1;
    c_02 += a_0 * b_2;
    c_12 += a_1 * b_2;
    c_22 += a_2 * b_2;
    c_32 += a_3 * b_2;
    c_03 += a_0 * b_3;
    c_13 += a_1 * b_3;
    c_23 += a_2 * b_3;
    c_33 += a_3 * b_3;
    a_0 = A[0 + lda * 3];
    a_1 = A[1 + lda * 3];
    a_2 = A[2 + lda * 3];
    a_3 = A[3 + lda * 3];
    b_0 = B[0 + lda * 3];
    b_1 = B[1 + lda * 3];
    b_2 = B[2 + lda * 3];
    b_3 = B[3 + lda * 3];
    c_00 += a_0 * b_0;
    c_10 += a_1 * b_0;
    c_20 += a_2 * b_0;
    c_30 += a_3 * b_0;
    c_01 += a_0 * b_1;
    c_11 += a_1 * b_1;
    c_21 += a_2 * b_1;
    c_31 += a_3 * b_1;
    c_02 += a_0 * b_2;
    c_12 += a_1 * b_2;
    c_22 += a_2 * b_2;
    c_32 += a_3 * b_2;
    c_03 += a_0 * b_3;
    c_13 += a_1 * b_3;
    c_23 += a_2 * b_3;
    c_33 += a_3 * b_3;
    A += 16;
    B += 16;
  }
  for (; k < kadd; k++) {
    a_0 = A[0 + lda * 0];
    a_1 = A[1 + lda * 0];
    a_2 = A[2 + lda * 0];
    a_3 = A[3 + lda * 0];
    b_0 = B[0 + lda * 0];
    b_1 = B[1 + lda * 0];
    b_2 = B[2 + lda * 0];
    b_3 = B[3 + lda * 0];
    c_00 += a_0 * b_0;
    c_10 += a_1 * b_0;
    c_20 += a_2 * b_0;
    c_30 += a_3 * b_0;
    c_01 += a_0 * b_1;
    c_11 += a_1 * b_1;
    c_21 += a_2 * b_1;
    c_31 += a_3 * b_1;
    c_02 += a_0 * b_2;
    c_12 += a_1 * b_2;
    c_22 += a_2 * b_2;
    c_32 += a_3 * b_2;
    c_03 += a_0 * b_3;
    c_13 += a_1 * b_3;
    c_23 += a_2 * b_3;
    c_33 += a_3 * b_3;
    A += 4;
    B += 4;
  }
  C[0 + ldc * 0] = c_00;
  C[1 + ldc * 0] = c_10;
  C[2 + ldc * 0] = c_20;
  C[3 + ldc * 0] = c_30;
  C[0 + ldc * 1] = c_01;
  C[1 + ldc * 1] = c_11;
  C[2 + ldc * 1] = c_21;
  C[3 + ldc * 1] = c_31;
  C[0 + ldc * 2] = c_02;
  C[1 + ldc * 2] = c_12;
  C[2 + ldc * 2] = c_22;
  C[3 + ldc * 2] = c_32;
  C[0 + ldc * 3] = c_03;
  C[1 + ldc * 3] = c_13;
  C[2 + ldc * 3] = c_23;
  C[3 + ldc * 3] = c_33;
}
```