| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 73 | int main() |
| 74 | { |
| 75 | verify_madd(13, 17, 19, 336); |
| 76 | |
| 77 | return 0; |
| 78 | } |