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Annotation of 43BSD/lib/libc/vax/gen/frexp.s, 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: 
                      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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