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 |