#6135: Unboxed Booleans -------------------------------+-------------------------------------------- Reporter: benl | Owner: jstolarek Type: feature request | Status: patch Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: None/Unknown | Difficulty: Unknown Testcase: | Blockedby: Blocking: | Related: #605 -------------------------------+-------------------------------------------- Comment(by gregorycollins): It's the {{{setge %cl}}} instruction in the code snippet on that wiki page, which: {{{ Sets the byte in the operand to 1 if the Sign Flag equals the Overflow Flag, otherwise sets the operand to 0. }}} (see e.g. http://web.itu.edu.tr/kesgin/mul06/intel/instr/setge_setnl.html) Or one of the other {{{SETcc}}} functions. This instruction doesn't branch, so the generated code pipelines better. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/6135#comment:70 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler