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Annotation of 43BSDReno/lib/libF77/d_mod.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 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:  *     @(#)d_mod.c     5.3     5/8/87
        !             7:  */
        !             8: #ifdef tahoe
        !             9: #include <tahoemath/FP.h>
        !            10: #endif tahoe
        !            11: 
        !            12: double d_mod(x,y)
        !            13: double *x, *y;
        !            14: {
        !            15: double floor(), quotient = *x / *y;
        !            16: if (quotient >= 0.0)
        !            17:        quotient = floor(quotient);
        !            18: else {
        !            19: #ifndef tahoe
        !            20:        quotient = -floor(-quotient);
        !            21: #else tahoe
        !            22:        *(unsigned long *)&quotient ^= SIGN_BIT;
        !            23:        quotient = floor(quotient);
        !            24:        if (quotient !=0)
        !            25:                *(unsigned long *)&quotient ^= SIGN_BIT;
        !            26: #endif tahoe
        !            27: }
        !            28: return(*x - (*y) * quotient );
        !            29: }

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