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Annotation of coherent/b/bin/c/h/i386/cc0mch.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * h/i386/cc0mch.h
                      3:  * Machine-specific definitions for the C compiler parser.
                      4:  * i386.
                      5:  */
                      6: 
                      7: /*
                      8:  * Some definitions for the portable floating point input code.
                      9:  * Used by the multiprecision integer package.
                     10:  * mch.h has set either IEEE or DECVAX to 1.
                     11:  * Both formats use 8 byte double constants with the sign bit in the same place.
                     12:  */
                     13: 
                     14: #define        NBIG    8                       /* Loop limit, etc.             */
                     15: typedef        unsigned char   BIG[NBIG];      /* Unsigned, holds 64 bits      */
                     16: #define        t5ne(n) ((n[0]&0370)!=0)        /* Check if top 5 bits clear    */
                     17: #define        cbit(n) (((n)>>8)&0377)         /* Get 'carry' for addition     */
                     18: #define        MSBBIG  0200                    /* Top bit of each thing        */
                     19: 
                     20: #if    IEEE
                     21: #define        IROUND  6                       /* IEEE format                  */
                     22: #define        BROUND  010                     /* 52 bits                      */
                     23: #define        EXPBIAS 1023                    /* binary exponent bias         */
                     24: #define        EXPMAX  2046                    /* maximum biased binary exponent */
                     25: #else
                     26: #define        IROUND  6                       /* DEC VAX-11 format            */
                     27: #define        BROUND  01                      /* 55 bits                      */
                     28: #define        EXPBIAS 129                     /* binary exponent bias         */
                     29: #define        EXPMAX  255                     /* maximum biased binary exponent */
                     30: #endif
                     31: 
                     32: /* This macro determines which bit field base types are promoted. */
                     33: #define doalign(t)             0
                     34: 
                     35: /* end of h/i386/cc0mch.h */

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