| 1 | /* |
| 2 | * Test m68k extended double denormals. |
| 3 | */ |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <stdint.h> |
| 7 | |
| 8 | #define TEST(X, Y) { X, Y, X * Y } |
| 9 | |
| 10 | static volatile long double test[][3] = { |
| 11 | TEST(0x1p+16383l, 0x1p-16446l), |
| 12 | TEST(0x1.1p-8223l, 0x1.1p-8224l), |
| 13 | TEST(1.0l, 0x1p-16383l), |
| 14 | }; |
| 15 | |
| 16 | #undef TEST |
| 17 | |
| 18 | static void dump_ld(const char *label, long double ld) |
| 19 | { |
| 20 | union { |
| 21 | long double d; |
| 22 | struct { |
| 23 | uint32_t exp:16; |
| 24 | uint32_t space:16; |
| 25 | uint32_t h; |
| 26 | uint32_t l; |
| 27 | }; |
| 28 | } u; |
| 29 | |
| 30 | u.d = ld; |
| 31 | printf("%12s: % -27La 0x%04x 0x%08x 0x%08x\n", label, u.d, u.exp, u.h, u.l); |
| 32 | } |
| 33 | |
| 34 | int main(void) |
| 35 | { |
| 36 | int i, n = sizeof(test) / sizeof(test[0]), err = 0; |
| 37 | |
| 38 | for (i = 0; i < n; ++i) { |
| 39 | long double x = test[i][0]; |
| 40 | long double y = test[i][1]; |
| 41 | long double build_mul = test[i][2]; |
| 42 | long double runtime_mul = x * y; |
| 43 | |
| 44 | if (runtime_mul != build_mul) { |
| 45 | dump_ld("x", x); |
| 46 | dump_ld("y", y); |
| 47 | dump_ld("build_mul", build_mul); |
| 48 | dump_ld("runtime_mul", runtime_mul); |
| 49 | err = 1; |
| 50 | } |
| 51 | } |
| 52 | return err; |
| 53 | } |