| 1 | # |
| 2 | # This module contains the stack push routine and the fltused |
| 3 | # symbol definition. Push() doesn't have to be machine coded |
| 4 | # but it does get called alot. The fltused definition will |
| 5 | # prevent the loader from adding some printf-associated modules. |
| 6 | # |
| 7 | # If APL is to be loaded from a library, then some undefined |
| 8 | # symbol must be present in the module which contains the |
| 9 | # fltused definition. In that sense, it is necessary to |
| 10 | # have _push (or something) in machine code. |
| 11 | # |
| 12 | # Ross Harvey 18-May-78 |
| 13 | # |
| 14 | .text |
| 15 | .globl _push |
| 16 | _push: .word 0 |
| 17 | movl _sp, r0 |
| 18 | # movl 4(ap),(r0) |
| 19 | # acbl $4,_sp,_staktop,ok |
| 20 | movl 4(ap),(r0)+ |
| 21 | cmpl r0, _staktop |
| 22 | bgtr toobig |
| 23 | movl r0, _sp |
| 24 | ret |
| 25 | toobig: movl r0,_sp |
| 26 | calls $0,_newstak |
| 27 | ret |