added instructions to macros, referring macro defination of x86
for macro ins_ANDdid not find equivalent s390x replacement instruction for 'Not' hence have currently marked the place as '????'
'????' has to be replaced with s390x complement instruction
f8-f15 are callee-saved (not f0,f2,f4 and f6). There isn't space
for them in the caller's stack frame so we need to increase the
size of the interpreter's stack frame.
I believe these macros obey the C calling convention, so we need to
allocate our stack frame and save all callee-save registers. We
can tune it later if it turns out we don't need all the registers.
