2.11BSD#431 - /usr/src/lib/libc/pdp/compat-2.9/fperr.s

   1: /*
   2:  * Copyright (c) 1987 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifdef SYSLIBC_SCCS
   8: _sccsid: <@(#)fperr.s	2.5 (Berkeley) 1/29/87\0>
   9:         .even
  10: #endif SYSLIBC_SCCS
  11: 
  12: /*
  13:  * fperr(fpe)
  14:  *	struct fperr *fpe;
  15:  *
  16:  * Get floating point error status from user structure and pass back to
  17:  * caller.
  18:  */
  19: #include "SYS.h"
  20: 
  21: ENTRY(fperr)
  22:         SYS(fperr)              / grab floating point exception registers
      /
      /   trap 155 -> [kernel] -> syscall() -> via sysent[] -> handler: fperr
      /
  23:         mov     r2,-(sp)
  24:         mov     4(sp), r2       /  and pass them back to the caller
  25:         mov     r0, (r2)+
  26:         mov     r1, (r2)
  27:         mov     (sp)+, r2
  28:         rts     pc

Defined functions