https://issues.dlang.org/show_bug.cgi?id=21023
Issue ID: 21023 Summary: 64 bit BSWAP instruction not supported by code generator Product: D Version: D2 Hardware: x86_64 OS: All Status: NEW Severity: normal Priority: P1 Component: dmd Assignee: nob...@puremagic.com Reporter: bugzi...@digitalmars.com References: BSWAP for 64 bits is emulated here: https://github.com/dlang/druntime/blob/master/src/core/bitop.d#L509 The instruction reference for it: https://www.felixcloutier.com/x86/bswap Performance problems evident here: https://github.com/dlang/phobos/pull/7534/files --