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Annotation of cci/usr/src/lib/libc/tahoe/gen/negf.x, revision 1.1

1.1     ! root        1: 
        !             2: #include <machine/fp.h>
        !             3:        .text
        !             4:        .globl  Xnegf
        !             5: _negf:
        !             6: Xnegf: .word   0x0000
        !             7:        clrl    r1
        !             8:        andl3   $EXPMASK,4(fp),r0       /* check for reserved operand,zero. */
        !             9:        beql    isreserved
        !            10:        movl    4(fp),r0                /* fetch operand. */
        !            11:        bbc     $31,r0,seton
        !            12:        andl2   $(0!SIGNBIT),r0         /* turn it off. */
        !            13:        ret
        !            14: seton: orl2    $SIGNBIT,r0             /* turn it on. */
        !            15:        ret
        !            16: isreserved:
        !            17:        bbc     $31,4(fp),retzero
        !            18:        callf   $4,sfpresop
        !            19:        ret
        !            20: retzero:
        !            21:        clrl    r0
        !            22:        ret

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