optimize.hpp
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #pragma once | ||
| 2 | |||
| 3 | #pragma GCC optimize("unroll-loops") | ||
| 4 | #pragma GCC optimize("Ofast") | ||
| 5 | #pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx") // Safe for yandex | ||
| 6 | |||
| 7 | #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,bmi,bmi2,mmx,avx,avx2,fma") // Requires AVX2 | ||
| 8 | |||
| 9 | // See https://codeforces.com/blog/entry/96344 | ||
| 10 | |||
| 11 | namespace wala { | ||
| 12 | |||
| 13 | ✗ | inline void disable_denormal_floats() { | |
| 14 | // https://stackoverflow.com/a/8217313 | ||
| 15 | #define CSR_FLUSH_TO_ZERO (1 << 15) | ||
| 16 | ✗ | unsigned csr = __builtin_ia32_stmxcsr(); | |
| 17 | ✗ | csr |= CSR_FLUSH_TO_ZERO; | |
| 18 | ✗ | __builtin_ia32_ldmxcsr(csr); | |
| 19 | #undef CSR_FLUSH_TO_ZERO | ||
| 20 | } | ||
| 21 | |||
| 22 | } // namespace wala | ||
| 23 |