1 ; HP-PA __udiv_qrnnd division support, used from longlong.h.
2 ; This version runs fast on pre-PA7000 CPUs.
4 ; Copyright (C) 1993, 1994, 2000 Free Software Foundation, Inc.
6 ; This file is part of the GNU MP Library.
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30 ; The code size is a bit excessive. We could merge the last two ds;addc
31 ; sequences by simply moving the "bb,< Odd" instruction down. The only
32 ; trouble is the FFFFFFFF code that would need some hacking.
35 .export __gmpn_udiv_qrnnd
38 .callinfo frame=0,no_calls
41 comb,< %r23,0,L$largedivisor
42 sub %r0,%r23,%r1 ; clear cy as side-effect
108 comclr,>= %r25,%r0,%r0
115 extru %r24,31,1,%r19 ; r19 = n0 & 1
117 extru %r23,30,31,%r22 ; r22 = d >> 1
118 shd %r25,%r24,1,%r24 ; r24 = new n0
119 extru %r25,30,31,%r25 ; r25 = new n1
186 comclr,>= %r25,%r0,%r0
188 sh1addl %r25,%r19,%r25
193 L$odd addib,sv,n 1,%r22,L$FF.. ; r22 = (d / 2 + 1)
194 shd %r25,%r24,1,%r24 ; r24 = new n0
195 extru %r25,30,31,%r25 ; r25 = new n1
263 comclr,>= %r25,%r0,%r0
265 sh1addl %r25,%r19,%r25
266 ; We have computed (n1,,n0) / (d + 1), q' = r28, r' = r25
267 add,nuv %r28,%r25,%r25
276 ; This is just a special case of the code above.
277 ; We come here when d == 0xFFFFFFFF
278 L$FF.. add,uv %r25,%r24,%r24