* Copyright (c) 1986 Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#if defined(SYSLIBC_SCCS) && !defined(lint)
.asciz "@(#)cvtud.s 1.2 (Berkeley) %G%"
#endif /* SYSLIBC_SCCS and not lint */
#include <tahoemath/fp.h>
XENTRY(cvtud, R2|R3|R4|R5)
movl 4(fp),r0 # fetch operand.
jeql retzero # return zero.
jneq positive # look for more set bits.
# we have the exponent in r2.
movl 4(fp),r0 # r0,r1 will hold the resulting f.p. number.
# Shift the fraction part to its proper place:
jlss shiftr # if less then zero we have to shift right.
shll r3,r0,r0 # else we shift left.
andl2 $CLEARHID,r0 # clear the hidden bit.
shal $EXPSHIFT,r2,r2 # shift the exponent to its proper place.
orl2 $EXPSIGN,r2 # set the exponent sign bit(to bias it).
orl2 r2,r0 # combine exponent & fraction.