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