1 /*
2 * Test R5900-specific three-operand MADD and MADD1.
3 */
4
5 #include <stdio.h>
6 #include <inttypes.h>
7 #include <assert.h>
8
madd(int64_t a,int32_t rs,int32_t rt)9 int64_t madd(int64_t a, int32_t rs, int32_t rt)
10 {
11 int32_t lo = a;
12 int32_t hi = a >> 32;
13 int32_t rd;
14 int64_t r;
15
16 __asm__ __volatile__ (
17 " mtlo %5\n"
18 " mthi %6\n"
19 " madd %0, %3, %4\n"
20 " mflo %1\n"
21 " mfhi %2\n"
22 : "=r" (rd), "=r" (lo), "=r" (hi)
23 : "r" (rs), "r" (rt), "r" (lo), "r" (hi));
24 r = ((int64_t)hi << 32) | (uint32_t)lo;
25
26 assert(a + (int64_t)rs * rt == r);
27 assert(rd == lo);
28
29 return r;
30 }
31
madd1(int64_t a,int32_t rs,int32_t rt)32 int64_t madd1(int64_t a, int32_t rs, int32_t rt)
33 {
34 int32_t lo = a;
35 int32_t hi = a >> 32;
36 int32_t rd;
37 int64_t r;
38
39 __asm__ __volatile__ (
40 " mtlo1 %5\n"
41 " mthi1 %6\n"
42 " madd1 %0, %3, %4\n"
43 " mflo1 %1\n"
44 " mfhi1 %2\n"
45 : "=r" (rd), "=r" (lo), "=r" (hi)
46 : "r" (rs), "r" (rt), "r" (lo), "r" (hi));
47 r = ((int64_t)hi << 32) | (uint32_t)lo;
48
49 assert(a + (int64_t)rs * rt == r);
50 assert(rd == lo);
51
52 return r;
53 }
54
madd_variants(int64_t a,int32_t rs,int32_t rt)55 static int64_t madd_variants(int64_t a, int32_t rs, int32_t rt)
56 {
57 int64_t rd = madd(a, rs, rt);
58 int64_t rd1 = madd1(a, rs, rt);
59
60 assert(rd == rd1);
61
62 return rd;
63 }
64
verify_madd(int64_t a,int32_t rs,int32_t rt,int64_t expected)65 static void verify_madd(int64_t a, int32_t rs, int32_t rt, int64_t expected)
66 {
67 assert(madd_variants(a, rs, rt) == expected);
68 assert(madd_variants(a, -rs, rt) == a + a - expected);
69 assert(madd_variants(a, rs, -rt) == a + a - expected);
70 assert(madd_variants(a, -rs, -rt) == expected);
71 }
72
main()73 int main()
74 {
75 verify_madd(13, 17, 19, 336);
76
77 return 0;
78 }
79