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/* { dg-do run } */

/* { dg-options "-O2 -msse2" } */

/* { dg-require-effective-target sse2 } */

#include "sse2-check.h"

#include <mmintrin.h>

#define N 4

unsigned long long a[N], b[N], result[N];

unsigned long long check[N] =

  { 0x101010101010100full,

    0x1010101010101010ull,

    0x1010101010101010ull,

    0x1010101010101010ull };

__m64

unsigned_add3 (const __m64 * a, const __m64 * b,

               __m64 * result, unsigned int count)

{

  __m64 _a, _b, one, sum, carry, onesCarry;

  unsigned int i;

  carry = _mm_setzero_si64 ();

  one = _mm_cmpeq_pi8 (carry, carry);

  one = _mm_sub_si64 (carry, one);

  for (i = 0; i < count; i++)

    {

      _a = a[i];

      _b = b[i];

      sum = _mm_add_si64 (_a, _b);

      sum = _mm_add_si64 (sum, carry);

      result[i] = sum;

      onesCarry = _mm_and_si64 (_mm_xor_si64 (_a, _b), carry);

      onesCarry = _mm_or_si64 (_mm_and_si64 (_a, _b), onesCarry);

      onesCarry = _mm_and_si64 (onesCarry, one);

      _a = _mm_srli_si64 (_a, 1);

      _b = _mm_srli_si64 (_b, 1);

      carry = _mm_add_si64 (_mm_add_si64 (_a, _b), onesCarry);

      carry = _mm_srli_si64 (carry, 63);

    }

  return carry;

}

void __attribute__((noinline))

sse2_test (void)

{

  unsigned long long carry;

  int i;

  /* Really long numbers.  */

  a[3] = a[2] = a[1] = a[0] = 0xd3d3d3d3d3d3d3d3ull;

  b[3] = b[2] = b[1] = b[0] = 0x3c3c3c3c3c3c3c3cull;

  carry = (unsigned long long) unsigned_add3

    ((__m64 *)a, (__m64 *)b, (__m64 *)result, N);

  _mm_empty ();

  if (carry != 1)

    abort ();

  for (i = 0; i < N; i++)

    if (result [i] != check[i])

      abort ();

}