#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */
typedef int /*<<< orphan*/ __m128i;

/* Variables and functions */
int /*<<< orphan*/ _MM_SHUFFLE(int, int, int, int);
int /*<<< orphan*/ _mm_or_si128(int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ _mm_shuffle_epi32(int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ _mm_shufflehi_epi16(int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ _mm_shufflelo_epi16(int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ _mm_slli_epi16(int /*<<< orphan*/, int);
int /*<<< orphan*/ _mm_srli_epi16(int /*<<< orphan*/, int);
__m128i _mm_bswap_si128(__m128i x) {
  __m128i a = _mm_or_si128(_mm_slli_epi16(x, 8), _mm_srli_epi16(x, 8));
  a = _mm_shufflelo_epi16(a, _MM_SHUFFLE(0, 1, 2, 3));
  a = _mm_shufflehi_epi16(a, _MM_SHUFFLE(0, 1, 2, 3));
  return _mm_shuffle_epi32(a, _MM_SHUFFLE(1, 0, 3, 2));
}


x86 assembly (clang, -O0):
<_mm_bswap_si128>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%edi
mov    $0x8,%esi
call   1090 <_mm_slli_epi16@plt>
mov    %eax,-0x18(%rbp)
mov    -0x4(%rbp),%edi
mov    $0x8,%esi
call   1040 <_mm_srli_epi16@plt>
mov    -0x18(%rbp),%edi
mov    %eax,%esi
call   1070 <_mm_or_si128@plt>
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
xor    %edi,%edi
mov    $0x1,%esi
mov    $0x2,%edx
mov    $0x3,%ecx
call   1030 <_MM_SHUFFLE@plt>
mov    -0x14(%rbp),%edi
mov    %eax,%esi
call   1050 <_mm_shufflelo_epi16@plt>
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x10(%rbp)
xor    %edi,%edi
mov    $0x1,%esi
mov    $0x2,%edx
mov    $0x3,%ecx
call   1030 <_MM_SHUFFLE@plt>
mov    -0x10(%rbp),%edi
mov    %eax,%esi
call   1080 <_mm_shufflehi_epi16@plt>
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    $0x1,%edi
xor    %esi,%esi
mov    $0x3,%edx
mov    $0x2,%ecx
call   1030 <_MM_SHUFFLE@plt>
mov    -0xc(%rbp),%edi
mov    %eax,%esi
call   1060 <_mm_shuffle_epi32@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<_mm_bswap_si128>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebx
mov    $0x8,%esi
call   1090 <_mm_slli_epi16@plt>
mov    %eax,%ebp
mov    %ebx,%edi
mov    $0x8,%esi
call   1040 <_mm_srli_epi16@plt>
mov    %ebp,%edi
mov    %eax,%esi
call   1070 <_mm_or_si128@plt>
mov    %eax,%ebx
xor    %edi,%edi
mov    $0x1,%esi
mov    $0x2,%edx
mov    $0x3,%ecx
call   1030 <_MM_SHUFFLE@plt>
mov    %ebx,%edi
mov    %eax,%esi
call   1050 <_mm_shufflelo_epi16@plt>
mov    %eax,%ebx
xor    %edi,%edi
mov    $0x1,%esi
mov    $0x2,%edx
mov    $0x3,%ecx
call   1030 <_MM_SHUFFLE@plt>
mov    %ebx,%edi
mov    %eax,%esi
call   1080 <_mm_shufflehi_epi16@plt>
mov    %eax,%ebx
mov    $0x1,%edi
xor    %esi,%esi
mov    $0x3,%edx
mov    $0x2,%ecx
call   1030 <_MM_SHUFFLE@plt>
mov    %ebx,%edi
mov    %eax,%esi
add    $0x8,%rsp
pop    %rbx
pop    %rbp
jmp    1060 <_mm_shuffle_epi32@plt>

LLVM IR (-O0):
define i32 @_mm_bswap_si128(i32 %0) {
%2 = alloca i32
%3 = alloca i32
store i32 %0, i32* %2
%4 = load i32, i32* %2
%5 = call i32 @_mm_slli_epi16(i32 %4, i32 8)
%6 = load i32, i32* %2
%7 = call i32 @_mm_srli_epi16(i32 %6, i32 8)
%8 = call i32 @_mm_or_si128(i32 %5, i32 %7)
store i32 %8, i32* %3
%9 = load i32, i32* %3
%10 = call i32 @_MM_SHUFFLE(i32 0, i32 1, i32 2, i32 3)
%11 = call i32 @_mm_shufflelo_epi16(i32 %9, i32 %10)
store i32 %11, i32* %3
%12 = load i32, i32* %3
%13 = call i32 @_MM_SHUFFLE(i32 0, i32 1, i32 2, i32 3)
%14 = call i32 @_mm_shufflehi_epi16(i32 %12, i32 %13)
store i32 %14, i32* %3
%15 = load i32, i32* %3
%16 = call i32 @_MM_SHUFFLE(i32 1, i32 0, i32 3, i32 2)
%17 = call i32 @_mm_shuffle_epi32(i32 %15, i32 %16)
ret i32 %17
}

LLVM IR (-O2):
define i32 @_mm_bswap_si128(i32 %0) {
%2 = tail call i32 @_mm_slli_epi16(i32 %0, i32 8)
%3 = tail call i32 @_mm_srli_epi16(i32 %0, i32 8)
%4 = tail call i32 @_mm_or_si128(i32 %2, i32 %3)
%5 = tail call i32 @_MM_SHUFFLE(i32 0, i32 1, i32 2, i32 3)
%6 = tail call i32 @_mm_shufflelo_epi16(i32 %4, i32 %5)
%7 = tail call i32 @_MM_SHUFFLE(i32 0, i32 1, i32 2, i32 3)
%8 = tail call i32 @_mm_shufflehi_epi16(i32 %6, i32 %7)
%9 = tail call i32 @_MM_SHUFFLE(i32 1, i32 0, i32 3, i32 2)
%10 = tail call i32 @_mm_shuffle_epi32(i32 %8, i32 %9)
ret i32 %10
}