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Annotation of 43BSDReno/lib/libF77/d_mod.c, revision 1.1.1.1

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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