1 /* { dg-do run } */
2 /* { dg-require-effective-target fma4 } */
3 /* { dg-options "-O2 -mfma4" } */
4
5 #include "fma4-check.h"
6
7 #include <x86intrin.h>
8 #include <string.h>
9
10 #define NUM 20
11
12 union
13 {
14 __m256 x[NUM];
15 float f[NUM * 8];
16 __m256d y[NUM];
17 double d[NUM * 4];
18 } dst, res, src1, src2, src3;
19
20 /* Note that in macc*,msub*,mnmacc* and mnsub* instructions, the intermdediate
21 product is not rounded, only the addition is rounded. */
22
23 static void
init_maccps()24 init_maccps ()
25 {
26 int i;
27 for (i = 0; i < NUM * 8; i++)
28 {
29 src1.f[i] = i;
30 src2.f[i] = i + 10;
31 src3.f[i] = i + 20;
32 }
33 }
34
35 static void
init_maccpd()36 init_maccpd ()
37 {
38 int i;
39 for (i = 0; i < NUM * 4; i++)
40 {
41 src1.d[i] = i;
42 src2.d[i] = i + 10;
43 src3.d[i] = i + 20;
44 }
45 }
46
47 static int
check_maccps()48 check_maccps ()
49 {
50 int i, j, check_fails = 0;
51 for (i = 0; i < NUM * 8; i = i + 8)
52 for (j = 0; j < 8; j++)
53 {
54 res.f[i + j] = (src1.f[i + j] * src2.f[i + j]) + src3.f[i + j];
55 if (dst.f[i + j] != res.f[i + j])
56 check_fails++;
57 }
58 return check_fails;
59 }
60
61 static int
check_maccpd()62 check_maccpd ()
63 {
64 int i, j, check_fails = 0;
65 for (i = 0; i < NUM * 4; i = i + 4)
66 for (j = 0; j < 4; j++)
67 {
68 res.d[i + j] = (src1.d[i + j] * src2.d[i + j]) + src3.d[i + j];
69 if (dst.d[i + j] != res.d[i + j])
70 check_fails++;
71 }
72 return check_fails;
73 }
74
75 static void
fma4_test(void)76 fma4_test (void)
77 {
78 int i;
79
80 init_maccps ();
81
82 for (i = 0; i < NUM; i++)
83 dst.x[i] = _mm256_macc_ps (src1.x[i], src2.x[i], src3.x[i]);
84
85 if (check_maccps ())
86 abort ();
87
88 init_maccpd ();
89
90 for (i = 0; i < NUM; i++)
91 dst.y[i] = _mm256_macc_pd (src1.y[i], src2.y[i], src3.y[i]);
92
93 if (check_maccpd ())
94 abort ();
95 }
96