> Nobody has provided PPC440-specific support for binutils. Right now, > everybody is using mcpu=[403|405] since they define an identical > set of instructions. The -mbooke support in current binutils will > not work on 440 since it is e500 specific. >
This is not exactly true, the -mbooke option does NOT produce an e500 specific set of instructions that the assembler knows about but as close to a generic booke set. Unfortunately, Book-E leaves remove for a few instructions to have implementation specific operands (for example tlbwe/tlbre). The e500 & 440 differ in the number of operands these instructions require (e500 - 0, 440 - 3). The currently binutils treats these instructions as having no operands. I am not aware of any other cases in which the current binutils would not work for 440 code (possibly use of simplified mtspr/mfspr instructions would not work with the -mbooke flag). - kumar ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
