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Annotation of 43BSD/lib/libc/vax/gen/frexp.s, 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: 
        !             7: #ifdef LIBC_SCCS
        !             8:        .asciz  "@(#)frexp.s    5.3 (Berkeley) 3/9/86"
        !             9: #endif LIBC_SCCS
        !            10: 
        !            11: /* C library -- frexp(value, eptr) */
        !            12: 
        !            13: #include "DEFS.h"
        !            14: 
        !            15: ENTRY(frexp, 0)
        !            16:        movd    4(ap),r0                # (r0,r1) := value
        !            17:        extzv   $7,$8,r0,*12(ap)        # Fetch exponent
        !            18:        jeql    1f                      # If exponent zero, we're done
        !            19:        subl2   $128,*12(ap)            # Bias the exponent appropriately
        !            20:        insv    $128,$7,$8,r0           # Force result exponent to biased 0
        !            21: 1:
        !            22:        ret

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