Adapted from 64-bit reverse polish JIT compiler
The call to execute the compiled expression is unimplemented as my personal edition of kdb+ is 32bit and don’t want to write the 32bit to long mode and back again hack.
$ q r.q KDB+ 3.4 2016.06.14 Copyright (C) 1993-2016 Kx Systems 0x4889e548b8ffffffffffffff7f48b80100000000000000585b4801d8504889ecc3
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1 2 3 4 5 6 |
/save rsp, push literals, if op, pop twice and addq, subq.. and push c:{raze 0x4889e5,(d each x),0x4889ec,0xc3} d:{$[102-type x;0x48b8,x;0x58,0x5b,((0x4801d8;0x4829d8;0x480fafc3;0x4899,0x4889ec)(+;-;*;%)?x),0x50]} j:-8#-8!7h$ t:{@[x;;j]where 0<>102 -7h?(type')x:(value'){x where not (1#" ")~/:x}@-4!x} c t"9223372036854775807 1 +" |
64bit RPN compiler in q