1 /*- 2 * Copyright (c) 1986 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Computer Consoles Inc. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)Adec.c 7.1 (Berkeley) 12/06/90 11 */ 12 13 #include "align.h" 14 dec(infop) process_info *infop; 15 /* 16 /* Decrement operand. 17 /* 18 /***************************************/ 19 { 20 register long Register_12; /* Has to be first reg ! */ 21 register long Register_11; 22 23 Register_11 = operand(infop,0)->data; 24 Register_12=psl; 25 Set_psl(r12); /* restore the user psl */ 26 asm (" decl r11"); /* Make sure to use the 27 * right opcode */ 28 asm (" movpsl r12"); 29 New_cc (Register_12); 30 31 write_back (infop,Register_11, operand(infop,0) ); 32 } 33