Commit | Line | Data |
---|---|---|
3a3c3fa2 SL |
1 | /* align.c 1.1 86/07/20 */ |
2 | ||
3 | #include "../tahoealign/align.h" | |
4 | ||
5 | /* | |
6 | * Part of the parameter list is set up by locore.s. | |
7 | * First 2 dummy variables MUST BE the first local | |
8 | * variables; leaving place for registers 0 and 1 | |
9 | * which are not preserved by the current C compiler. | |
10 | * Then, the array of structures and the last_operand | |
11 | * HAVE to be in the given order, to correspond to the | |
12 | * description of process_info in 'alignment.h'. | |
13 | */ | |
14 | alignment() | |
15 | { | |
16 | long space_4_Register_1; /* register 1 */ | |
17 | long space_4_Register_0; /* register 0 */ | |
18 | struct oprnd space_4_decoded[4]; | |
19 | long space_4_opcode; | |
20 | long space_4_last_operand; /* Last operand # processed */ | |
21 | long space_4_saved_pc; | |
22 | long space_4_saved_sp; | |
23 | ||
24 | register process_info *infop; | |
25 | ||
26 | infop = (process_info *)&space_4_saved_sp; | |
27 | saved_pc = pc; | |
28 | saved_sp = sp; /* For possible exceptions */ | |
29 | ||
30 | last_operand = -1; /* To get the operand routine going correctly */ | |
31 | ||
32 | opCODE = 0xff & *(char *)pc; | |
33 | pc++; | |
34 | (*Table[opCODE].routine) (infop); /* Call relevant handler */ | |
35 | /* | |
36 | * NOTE: nothing should follow, except the return. | |
37 | * The register variables cannot be trusted anymore, | |
38 | * if an exception is signalled. See 'exception.c' | |
39 | * to understand why. | |
40 | */ | |
41 | } |