diff options
| -rw-r--r-- | src/core/ao_int64.c | 11 | ||||
| -rw-r--r-- | src/core/ao_int64.h | 2 | ||||
| -rw-r--r-- | src/test/ao_int64_test.c | 4 |
3 files changed, 17 insertions, 0 deletions
diff --git a/src/core/ao_int64.c b/src/core/ao_int64.c index 5307342d..07cdb357 100644 --- a/src/core/ao_int64.c +++ b/src/core/ao_int64.c @@ -27,6 +27,17 @@ void ao_plus64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b) { r->low = t; } +void ao_minus64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b) { + uint32_t t; + + + r->high = a->high - b->high; + t = a->low - b->low; + if (t > a->low) + r->high--; + r->low = t; +} + void ao_rshift64(ao_int64_t *r, ao_int64_t *a, uint8_t d) { if (d < 32) { r->low = a->low >> d; diff --git a/src/core/ao_int64.h b/src/core/ao_int64.h index e5eee823..cf12f0d8 100644 --- a/src/core/ao_int64.h +++ b/src/core/ao_int64.h @@ -26,6 +26,7 @@ typedef struct { } ao_int64_t; void ao_plus64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b); +void ao_minus64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b); void ao_neg64(ao_int64_t *r, ao_int64_t *a); void ao_lshift64_16(ao_int64_t *r, uint16_t a, uint8_t d); void ao_rshift64(ao_int64_t *r, ao_int64_t *a, uint8_t d); @@ -33,6 +34,7 @@ void ao_lshift64(ao_int64_t *r, ao_int64_t *a, uint8_t d); void ao_mul64_64_64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b); void ao_mul64_32_32(ao_int64_t *r, int32_t a, int32_t b); void ao_mul64_64_16(ao_int64_t *r, ao_int64_t *a, uint16_t b); +void ao_mul64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b); #define ao_int64_init32(r, a) (((r)->high = 0), (r)->low = (a)) #define ao_int64_init64(r, a, b) (((r)->high = (a)), (r)->low = (b)) diff --git a/src/test/ao_int64_test.c b/src/test/ao_int64_test.c index 4c88b1a1..c26a63b0 100644 --- a/src/test/ao_int64_test.c +++ b/src/test/ao_int64_test.c @@ -65,6 +65,10 @@ do_test(int trial, int64_t a, int64_t b) test_a(+, ao_plus64, a, b, &ao_a, &ao_b); test_b(+, ao_plus64, a, b, &ao_a, &ao_b); test_x(+, ao_plus64, a, b, &ao_a, &ao_b); + test(-, ao_minus64, a, b, &ao_a, &ao_b); + test_a(-, ao_minus64, a, b, &ao_a, &ao_b); + test_b(-, ao_minus64, a, b, &ao_a, &ao_b); + test_x(-, ao_minus64, a, b, &ao_a, &ao_b); test(*, ao_mul64_32_32,(int64_t) (int32_t) a, (int32_t) b, (int32_t) a, (int32_t) b); test(*, ao_mul64, a, b, &ao_a, &ao_b); test_a(*, ao_mul64, a, b, &ao_a, &ao_b); |