search for: encodexyzforbasicmem

I'm attempting to implement codegen support for the AVR ST/LD <http://www.atmel.com/webdoc/avrassembler/avrassembler.wb_ST.html> family of instructions. The binary encoding is not particularly consistent -- take a look at this table of variants of LD, along with their machine code representation: # load 8 bits from pointer register X into general purpose Rd ld Rd, X `1001 000d dddd

...od that gets assigned to >> both the dddd and the odd field. >> >> Something like: >> >> def BasicMemXYZ : Operand<i16> { >> let MIOperandInfo = (ops XYZReg); // Sorry, don't know what you've >> called it >> let CustomEncoder = "encodeXYZForBasicMem"; >> } >> >> Associate that operand with 5 bits in the instruction instead of 4 and >> let the C++ set the final bit as appropriate. >> >> Cheers. >> >> Tim. >> > > -------------- next part -------------- An HTML attachment was scrubb...