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Annotation of 43BSDTahoe/usr.lib/libm/vax/infnan.s, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1985 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  *
                     17:  * All recipients should regard themselves as participants in an ongoing
                     18:  * research project and hence should feel obligated to report their
                     19:  * experiences (good or bad) with these elementary function codes, using
                     20:  * the sendbug(8) program, to the authors.
                     21:  *
                     22:  *     @(#)infnan.s    5.3 (Berkeley) 6/30/88
                     23:  */
                     24:        .data
                     25:        .align  2
                     26: _sccsid:
                     27: .asciz "@(#)infnan.s   1.1 (Berkeley) 8/21/85; 5.3 (ucb.elefunt) 6/30/88"
                     28: 
                     29: /*
                     30:  * infnan(arg) int arg;
                     31:  * where arg :=    EDOM        if result is  NaN
                     32:  *          :=  ERANGE if result is +INF
                     33:  *          := -ERANGE if result is -INF
                     34:  *
                     35:  * The Reserved Operand Fault is generated inside of this routine.
                     36:  */    
                     37:        .globl  _infnan
                     38:        .set    EDOM,33
                     39:        .set    ERANGE,34
                     40:        .text
                     41:        .align 1
                     42: _infnan:
                     43:        .word   0x0
                     44:        cmpl    4(ap),$ERANGE
                     45:        bneq    1f
                     46:        movl    $ERANGE,_errno
                     47:        brb     2f
                     48: 1:     movl    $EDOM,_errno
                     49: 2:     emodd   $0,$0,$0x8000,r0,r0     # generates the reserved operand fault
                     50:        ret

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