1 /* { dg-do run } */
2 /* { dg-require-effective-target ssse3 } */
3 /* { dg-options "-O2 -fno-strict-aliasing -mssse3" } */
4
5 #ifndef CHECK_H
6 #define CHECK_H "ssse3-check.h"
7 #endif
8
9 #ifndef TEST
10 #define TEST ssse3_test
11 #endif
12
13 #include CHECK_H
14
15 #include "ssse3-vals.h"
16
17 #include <tmmintrin.h>
18
19 /* Test the 64-bit form */
20 static void
ssse3_test_phsubsw(int * i1,int * i2,int * r)21 ssse3_test_phsubsw (int *i1, int *i2, int *r)
22 {
23 __m64 t1 = *(__m64 *) i1;
24 __m64 t2 = *(__m64 *) i2;
25
26 *(__m64 *) r = _mm_hsubs_pi16 (t1, t2);
27
28 _mm_empty ();
29 }
30
31 /* Test the 128-bit form */
32 static void
ssse3_test_phsubsw128(int * i1,int * i2,int * r)33 ssse3_test_phsubsw128 (int *i1, int *i2, int *r)
34 {
35 /* Assumes incoming pointers are 16-byte aligned */
36 __m128i t1 = *(__m128i *) i1;
37 __m128i t2 = *(__m128i *) i2;
38 *(__m128i *) r = _mm_hsubs_epi16 (t1, t2);
39 }
40
41 static short
signed_saturate_to_word(int x)42 signed_saturate_to_word (int x)
43 {
44 if (x > (int )0x7fff)
45 return 0x7fff;
46
47 if (x < (int) 0xffff8000)
48 return 0x8000;
49
50 return (short)x;
51 }
52
53 /* Routine to manually compute the results */
54 static void
compute_correct_result(int * i1,int * i2,int * r)55 compute_correct_result (int *i1, int *i2, int *r)
56 {
57 short *s1 = (short *) i1;
58 short *s2 = (short *) i2;
59 short *sout = (short *) r;
60 int i;
61
62 for (i = 0; i < 4; i++)
63 sout[i] = signed_saturate_to_word (s1[2 * i] - s1[2 * i + 1]);
64
65 for (i = 0; i < 4; i++)
66 sout[i + 4] = signed_saturate_to_word (s2[2 * i] - s2[2 * i + 1]);
67 }
68
69 static void
TEST(void)70 TEST (void)
71 {
72 int i;
73 int r [4] __attribute__ ((aligned(16)));
74 int ck [4];
75 int fail = 0;
76
77 for (i = 0; i < 256; i += 8)
78 {
79 /* Manually compute the result */
80 compute_correct_result (&vals[i + 0], &vals[i + 4], ck);
81
82 /* Run the 64-bit tests */
83 ssse3_test_phsubsw (&vals[i + 0], &vals[i + 2], &r[0]);
84 ssse3_test_phsubsw (&vals[i + 4], &vals[i + 6], &r[2]);
85 fail += chk_128 (ck, r);
86
87 /* Run the 128-bit tests */
88 ssse3_test_phsubsw128 (&vals[i + 0], &vals[i + 4], r);
89 fail += chk_128 (ck, r);
90 }
91
92 if (fail != 0)
93 abort ();
94 }
95