gcc/testsuite/gcc.target/i386/sse4_1-packusdw.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target sse4 } */
   3 /* { dg-options "-O2 -msse4.1" } */
   4
   5 #ifndef CHECK_H
   6 #define CHECK_H "sse4_1-check.h"
   7 #endif
   8
   9 #ifndef TEST
  10 #define TEST sse4_1_test
  11 #endif
  12
  13 #include CHECK_H
  14
  15 #include <smmintrin.h>
  16
  17 #define NUM 64
  18
  19 static unsigned short
  20 int_to_ushort (int iVal)
  21 {
  22   unsigned short sVal;
  23
  24   if (iVal < 0)
  25     sVal = 0;
  26   else if (iVal > 0xffff)
  27     sVal = 0xffff;
  28   else sVal = iVal;
  29
  30   return sVal;
  31 }
  32
  33 static void
  34 TEST (void)
  35 {
  36   union
  37     {
  38       __m128i x[NUM / 4];
  39       int i[NUM];
  40     } src1, src2;
  41   union
  42     {
  43       __m128i x[NUM / 4];
  44       unsigned short s[NUM * 2];
  45     } dst;
  46   int i, sign = 1;
  47
  48   for (i = 0; i < NUM; i++)
  49     {
  50       src1.i[i] = i * i * sign;
  51       src2.i[i] = (i + 20) * sign;
  52       sign = -sign;
  53     }
  54
  55   for (i = 0; i < NUM; i += 4)
  56     dst.x[i / 4] = _mm_packus_epi32 (src1.x [i / 4], src2.x [i / 4]);
  57
  58   for (i = 0; i < NUM; i ++)
  59     {
  60       int dstIndex;
  61       unsigned short sVal;
  62
  63       sVal = int_to_ushort (src1.i[i]);
  64       dstIndex = (i % 4) + (i / 4) * 8;
  65       if (sVal != dst.s[dstIndex])
  66         abort ();
  67
  68       sVal = int_to_ushort (src2.i[i]);
  69       dstIndex += 4;
  70       if (sVal != dst.s[dstIndex])
  71         abort ();
  72     }
  73 }