stby.c (1999B)
1 /* Test STBY */ 2 3 #include <pthread.h> 4 #include <stdio.h> 5 #include <stdlib.h> 6 #include <string.h> 7 8 9 struct S { 10 unsigned a; 11 unsigned b; 12 unsigned c; 13 }; 14 15 static void check(const struct S *s, unsigned e, 16 const char *which, const char *insn, int ofs) 17 { 18 int err = 0; 19 20 if (s->a != 0) { 21 fprintf(stderr, "%s %s %d: garbage before word 0x%08x\n", 22 which, insn, ofs, s->a); 23 err = 1; 24 } 25 if (s->c != 0) { 26 fprintf(stderr, "%s %s %d: garbage after word 0x%08x\n", 27 which, insn, ofs, s->c); 28 err = 1; 29 } 30 if (s->b != e) { 31 fprintf(stderr, "%s %s %d: 0x%08x != 0x%08x\n", 32 which, insn, ofs, s->b, e); 33 err = 1; 34 } 35 36 if (err) { 37 exit(1); 38 } 39 } 40 41 #define TEST(INSN, OFS, E) \ 42 do { \ 43 s.b = 0; \ 44 asm volatile(INSN " %1, " #OFS "(%0)" \ 45 : : "r"(&s.b), "r" (0x11223344) : "memory"); \ 46 check(&s, E, which, INSN, OFS); \ 47 } while (0) 48 49 static void test(const char *which) 50 { 51 struct S s = { }; 52 53 TEST("stby,b", 0, 0x11223344); 54 TEST("stby,b", 1, 0x00223344); 55 TEST("stby,b", 2, 0x00003344); 56 TEST("stby,b", 3, 0x00000044); 57 58 TEST("stby,e", 0, 0x00000000); 59 TEST("stby,e", 1, 0x11000000); 60 TEST("stby,e", 2, 0x11220000); 61 TEST("stby,e", 3, 0x11223300); 62 } 63 64 static void *child(void *x) 65 { 66 return NULL; 67 } 68 69 int main() 70 { 71 int err; 72 pthread_t thr; 73 74 /* Run test in serial mode */ 75 test("serial"); 76 77 /* Create a dummy thread to start parallel mode. */ 78 err = pthread_create(&thr, NULL, child, NULL); 79 if (err != 0) { 80 fprintf(stderr, "pthread_create: %s\n", strerror(err)); 81 return 2; 82 } 83 84 /* Run test in parallel mode */ 85 test("parallel"); 86 return 0; 87 }