projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 3c5d933b SJ |
1 | /* PDP11 Registers */ |
| 2 | ||
| 3 | /* scratch registers */ | |
| 4 | # define R0 0 | |
| 5 | # define R1 1 | |
| 6 | ||
| 7 | /* register variables */ | |
| 8 | # define R2 2 | |
| 9 | # define R3 3 | |
| 10 | # define R4 4 | |
| 11 | ||
| 12 | /* special purpose */ | |
| 13 | # define R5 5 /* frame pointer */ | |
| 14 | # define SP 6 /* stack pointer */ | |
| 15 | # define PC 7 /* program counter */ | |
| 16 | ||
| 17 | /* floating registers */ | |
| 18 | ||
| 19 | # define FR0 8 | |
| 20 | # define FR1 9 | |
| 21 | # define FR2 10 | |
| 22 | # define FR3 11 | |
| 23 | # define FR4 12 | |
| 24 | # define FR5 13 | |
| 25 | ||
| 26 | # define SAVEREGION 8 /* number of bytes for save area */ | |
| 27 | ||
| 28 | # define BYTEOFF(x) ((x)&01) | |
| 29 | # define wdal(k) (BYTEOFF(k)==0) | |
| 30 | # define BITOOR(x) ((x)>>3) /* bit offset to oreg offset */ | |
| 31 | ||
| 32 | # define REGSZ 14 | |
| 33 | ||
| 34 | # define TMPREG R5 | |
| 35 | ||
| 36 | ||
| 37 | # define STOARG(p) /* just evaluate the arguments, and be done with it... */ | |
| 38 | # define STOFARG(p) | |
| 39 | # define STOSTARG(p) | |
| 40 | # define genfcall(a,b) gencall(a,b) | |
| 41 | ||
| 42 | ||
| 43 | /* shape for constants between -128 and 127 */ | |
| 44 | # define SCCON (SPECIAL+100) | |
| 45 | /* shape for constants between 0 and 32767 */ | |
| 46 | # define SICON (SPECIAL+101) | |
| 47 | ||
| 48 | # define MYREADER(p) myreader(p) | |
| 49 | extern int fltused; | |
| 50 | /* calls can be nested on the PDP-11 */ | |
| 51 | # define NESTCALLS |