Opened 9 years ago
Last modified 9 years ago
#9243 closed Bugs
Subopimal bitwise or (with bytes) — at Version 1
| Reported by: | Domagoj Šarić | Owned by: | John Maddock |
|---|---|---|---|
| Milestone: | To Be Determined | Component: | multiprecision |
| Version: | Boost 1.54.0 | Severity: | Optimization |
| Keywords: | Cc: |
Description (last modified by )
I'd expect oring with a byte (or any integral builtin type smaller or equal in size to a static, unchecked, unsigned cpp_int) to produce a single instruction, yet it evaluates to a call to a fairly fat function...
ps. I'm doing number<> big_int; unsigned char const * p_data; while () { big_int |= *p_data++; big_int <<= 8; }
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