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 } 42