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Annotation of 43BSDTahoe/sys/tahoemath/Ksubf.s, revision 1.1

1.1     ! root        1: /*     Ksubf.s 1.3     86/01/05        */
        !             2: 
        !             3: #include "../tahoe/SYS.h"
        !             4: 
        !             5: /*
        !             6:  * _Ksubf(acc_most,acc_least,op_most,op_least,hfs)
        !             7:  *
        !             8:  * subf(d1,d2)
        !             9:  * {
        !            10:  *     return(d1+(-d2));
        !            11:  * }
        !            12:  */
        !            13:        .text
        !            14: ENTRY(Ksubf, 0)
        !            15:        tstl    4(fp)   # handle (a-b) where a and/or b = 0.0
        !            16:        jneq    next
        !            17:        movl    $0,r1
        !            18:        movl    12(fp),r0
        !            19:        lnd     r0
        !            20:        std     r0
        !            21:        ret
        !            22: next:
        !            23:        tstl    12(fp)
        !            24:        jneq    doit
        !            25:        movl    $0,r1
        !            26:        movl    4(fp),r0
        !            27:        ret
        !            28: doit:
        !            29:        lnd     12(fp)  # note: -(0) = 0 by definition!
        !            30:        pushl   20(fp)  # hfs
        !            31:        pushd   
        !            32:        pushl   8(fp)
        !            33:        pushl   4(fp)   # acc
        !            34:        callf   $24,_Kaddf
        !            35:        ret

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