kolibrios-fun/programs/develop/libraries/kolibri-libc/source/math/modfl.s

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/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
.global modfl;
modfl:
pushl %ebp
movl %esp,%ebp
subl $4,%esp
fldt 8(%ebp)
movl 20(%ebp),%eax
fnstcw -2(%ebp)
movw -2(%ebp),%dx
orb $0x0c,%dh
movw %dx,-4(%ebp)
fldcw -4(%ebp)
fld %st(0)
frndint
fldcw -2(%ebp)
fld %st(0)
fstpt (%eax)
fsubrp %st,%st(1)
leave
ret