usr/src/sys/tahoe/align/Adec.c

/*      Adec.c  1.2     90/12/04        */

#include "align.h"
dec(infop)      process_info *infop;
/*
/*      Decrement operand.
/*
/***************************************/
{
        register        long    Register_12;    /* Has to be first reg ! */
        register        long    Register_11;

        Register_11 = operand(infop,0)->data;
        Register_12=psl;
        Set_psl(r12);   /* restore the user psl */
        asm ("  decl    r11");                  /* Make sure to use the
                                                 * right opcode */
        asm ("  movpsl  r12");
        New_cc (Register_12);

        write_back (infop,Register_11, operand(infop,0) );
}