comparison: src/cx/utils.h
src/cx/utils.h
- changeset 649
- 12c2b10b51a9
- parent 628
- 1e2be40f0cb5
- child 651
- 19d1a8422f6e
equal
deleted
inserted
replaced
| 648:4e115b610b37 | 649:12c2b10b51a9 |
|---|---|
| 56 #if (__GNUC__ >= 5 || defined(__clang__)) && !defined(CX_NO_SZMUL_BUILTIN) | 56 #if (__GNUC__ >= 5 || defined(__clang__)) && !defined(CX_NO_SZMUL_BUILTIN) |
| 57 #define CX_SZMUL_BUILTIN | 57 #define CX_SZMUL_BUILTIN |
| 58 | 58 |
| 59 #if __WORDSIZE == 32 | 59 #if __WORDSIZE == 32 |
| 60 /** | 60 /** |
| 61 * Alias for \c __builtin_umul_overflow. | |
| 62 * | |
| 63 * Performs a multiplication of size_t values and checks for overflow. | |
| 64 * | |
| 65 * @param a first operand | |
| 66 * @param b second operand | |
| 67 * @param result a pointer to a size_t, where the result should | |
| 68 * be stored | |
| 69 * @return zero, if no overflow occurred and the result is correct, non-zero | |
| 70 * otherwise | |
| 71 */ | |
| 72 #define cx_szmul(a, b, result) __builtin_umul_overflow(a, b, result) | |
| 73 #else // __WORDSIZE != 32 | |
| 74 /** | |
| 75 * Alias for \c __builtin_umull_overflow. | 61 * Alias for \c __builtin_umull_overflow. |
| 76 * | 62 * |
| 77 * Performs a multiplication of size_t values and checks for overflow. | 63 * Performs a multiplication of size_t values and checks for overflow. |
| 78 * | 64 * |
| 79 * @param a first operand | 65 * @param a first operand |
| 82 * be stored | 68 * be stored |
| 83 * @return zero, if no overflow occurred and the result is correct, non-zero | 69 * @return zero, if no overflow occurred and the result is correct, non-zero |
| 84 * otherwise | 70 * otherwise |
| 85 */ | 71 */ |
| 86 #define cx_szmul(a, b, result) __builtin_umull_overflow(a, b, result) | 72 #define cx_szmul(a, b, result) __builtin_umull_overflow(a, b, result) |
| 73 #else // __WORDSIZE != 32 | |
| 74 /** | |
| 75 * Alias for \c __builtin_umulll_overflow. | |
| 76 * | |
| 77 * Performs a multiplication of size_t values and checks for overflow. | |
| 78 * | |
| 79 * @param a first operand | |
| 80 * @param b second operand | |
| 81 * @param result a pointer to a size_t, where the result should | |
| 82 * be stored | |
| 83 * @return zero, if no overflow occurred and the result is correct, non-zero | |
| 84 * otherwise | |
| 85 */ | |
| 86 #define cx_szmul(a, b, result) __builtin_umulll_overflow(a, b, result) | |
| 87 #endif // __WORDSIZE | 87 #endif // __WORDSIZE |
| 88 | 88 |
| 89 #else // no GNUC or clang bultin | 89 #else // no GNUC or clang bultin |
| 90 | 90 |
| 91 /** | 91 /** |
