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1 /* Test fxtract instruction. */
2
3 #include <stdint.h>
4 #include <stdio.h>
5
6 union u {
7 struct { uint64_t sig; uint16_t sign_exp; } s;
8 long double ld;
9 };
10
11 volatile union u ld_pseudo_m16382 = { .s = { UINT64_C(1) << 63, 0 } };
12 volatile union u ld_invalid_1 = { .s = { 1, 1234 } };
13 volatile union u ld_invalid_2 = { .s = { 0, 1234 } };
14 volatile union u ld_invalid_3 = { .s = { 0, 0x7fff } };
15 volatile union u ld_invalid_4 = { .s = { (UINT64_C(1) << 63) - 1, 0x7fff } };
16
17 volatile long double ld_sig, ld_exp;
18
19 int isnan_ld(long double x)
20 {
21 union u tmp = { .ld = x };
22 return ((tmp.s.sign_exp & 0x7fff) == 0x7fff &&
23 (tmp.s.sig >> 63) != 0 &&
24 (tmp.s.sig << 1) != 0);
25 }
26
27 int issignaling_ld(long double x)
28 {
29 union u tmp = { .ld = x };
30 return isnan_ld(x) && (tmp.s.sig & UINT64_C(0x4000000000000000)) == 0;
31 }
32
33 int main(void)
34 {
35 int ret = 0;
36 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) : "0" (2.5L));
37 if (ld_sig != 1.25L || ld_exp != 1.0L) {
38 printf("FAIL: fxtract 2.5\n");
39 ret = 1;
40 }
41 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) : "0" (0.0L));
42 if (ld_sig != 0.0L || __builtin_copysignl(1.0L, ld_sig) != 1.0L ||
43 ld_exp != -__builtin_infl()) {
44 printf("FAIL: fxtract 0.0\n");
45 ret = 1;
46 }
47 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) : "0" (-0.0L));
48 if (ld_sig != -0.0L || __builtin_copysignl(1.0L, ld_sig) != -1.0L ||
49 ld_exp != -__builtin_infl()) {
50 printf("FAIL: fxtract -0.0\n");
51 ret = 1;
52 }
53 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
54 "0" (__builtin_infl()));
55 if (ld_sig != __builtin_infl() || ld_exp != __builtin_infl()) {
56 printf("FAIL: fxtract inf\n");
57 ret = 1;
58 }
59 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
60 "0" (-__builtin_infl()));
61 if (ld_sig != -__builtin_infl() || ld_exp != __builtin_infl()) {
62 printf("FAIL: fxtract -inf\n");
63 ret = 1;
64 }
65 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
66 "0" (__builtin_nanl("")));
67 if (!isnan_ld(ld_sig) || issignaling_ld(ld_sig) ||
68 !isnan_ld(ld_exp) || issignaling_ld(ld_exp)) {
69 printf("FAIL: fxtract qnan\n");
70 ret = 1;
71 }
72 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
73 "0" (__builtin_nansl("")));
74 if (!isnan_ld(ld_sig) || issignaling_ld(ld_sig) ||
75 !isnan_ld(ld_exp) || issignaling_ld(ld_exp)) {
76 printf("FAIL: fxtract snan\n");
77 ret = 1;
78 }
79 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
80 "0" (0x1p-16445L));
81 if (ld_sig != 1.0L || ld_exp != -16445.0L) {
82 printf("FAIL: fxtract subnormal\n");
83 ret = 1;
84 }
85 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
86 "0" (ld_pseudo_m16382.ld));
87 if (ld_sig != 1.0L || ld_exp != -16382.0L) {
88 printf("FAIL: fxtract pseudo\n");
89 ret = 1;
90 }
91 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
92 "0" (ld_invalid_1.ld));
93 if (!isnan_ld(ld_sig) || issignaling_ld(ld_sig) ||
94 !isnan_ld(ld_exp) || issignaling_ld(ld_exp)) {
95 printf("FAIL: fxtract invalid 1\n");
96 ret = 1;
97 }
98 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
99 "0" (ld_invalid_2.ld));
100 if (!isnan_ld(ld_sig) || issignaling_ld(ld_sig) ||
101 !isnan_ld(ld_exp) || issignaling_ld(ld_exp)) {
102 printf("FAIL: fxtract invalid 2\n");
103 ret = 1;
104 }
105 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
106 "0" (ld_invalid_3.ld));
107 if (!isnan_ld(ld_sig) || issignaling_ld(ld_sig) ||
108 !isnan_ld(ld_exp) || issignaling_ld(ld_exp)) {
109 printf("FAIL: fxtract invalid 3\n");
110 ret = 1;
111 }
112 __asm__ volatile ("fxtract" : "=t" (ld_sig), "=u" (ld_exp) :
113 "0" (ld_invalid_4.ld));
114 if (!isnan_ld(ld_sig) || issignaling_ld(ld_sig) ||
115 !isnan_ld(ld_exp) || issignaling_ld(ld_exp)) {
116 printf("FAIL: fxtract invalid 4\n");
117 ret = 1;
118 }
119 return ret;
120 }