dnl HP-PA __udiv_qrnnd division support, used from longlong.h. dnl This version runs fast on pre-PA7000 CPUs. dnl Copyright 1993, 1994, 2000, 2001, 2002 Free Software Foundation, Inc. dnl This file is part of the GNU MP Library. dnl The GNU MP Library is free software; you can redistribute it and/or modify dnl it under the terms of the GNU Lesser General Public License as published dnl by the Free Software Foundation; either version 2.1 of the License, or (at dnl your option) any later version. dnl The GNU MP Library is distributed in the hope that it will be useful, but dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public dnl License for more details. dnl You should have received a copy of the GNU Lesser General Public License dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, dnl Boston, MA 02110-1301, USA. include(`../config.m4') C INPUT PARAMETERS C rem_ptr gr26 C n1 gr25 C n0 gr24 C d gr23 C The code size is a bit excessive. We could merge the last two ds;addc C sequences by simply moving the "bb,< Odd" instruction down. The only C trouble is the FFFFFFFF code that would need some hacking. ASM_START() PROLOGUE(mpn_udiv_qrnnd) comb,< %r23,0,L(largedivisor) sub %r0,%r23,%r1 C clear cy as side-effect ds %r0,%r1,%r0 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r24 ds %r25,%r23,%r25 addc %r24,%r24,%r28 ds %r25,%r23,%r25 comclr,>= %r25,%r0,%r0 addl %r25,%r23,%r25 stws %r25,0(0,%r26) bv 0(%r2) addc %r28,%r28,%r28 LDEF(largedivisor) extru %r24,31,1,%r19 C r19 = n0 & 1 bb,< %r23,31,L(odd) extru %r23,30,31,%r22 C r22 = d >> 1 shd %r25,%r24,1,%r24 C r24 = new n0 extru %r25,30,31,%r25 C r25 = new n1 sub %r0,%r22,%r21 ds %r0,%r21,%r0 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 comclr,>= %r25,%r0,%r0 addl %r25,%r22,%r25 sh1addl %r25,%r19,%r25 stws %r25,0(0,%r26) bv 0(%r2) addc %r24,%r24,%r28 LDEF(odd) addib,sv,n 1,%r22,L(FFFFFFFF) C r22 = (d / 2 + 1) shd %r25,%r24,1,%r24 C r24 = new n0 extru %r25,30,31,%r25 C r25 = new n1 sub %r0,%r22,%r21 ds %r0,%r21,%r0 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r24 ds %r25,%r22,%r25 addc %r24,%r24,%r28 comclr,>= %r25,%r0,%r0 addl %r25,%r22,%r25 sh1addl %r25,%r19,%r25 C We have computed (n1,,n0) / (d + 1), q' = r28, r' = r25 add,nuv %r28,%r25,%r25 addl %r25,%r1,%r25 addc %r0,%r28,%r28 sub,<< %r25,%r23,%r0 addl %r25,%r1,%r25 stws %r25,0(0,%r26) bv 0(%r2) addc %r0,%r28,%r28 C This is just a special case of the code above. C We come here when d == 0xFFFFFFFF LDEF(FFFFFFFF) add,uv %r25,%r24,%r24 sub,<< %r24,%r23,%r0 ldo 1(%r24),%r24 stws %r24,0(0,%r26) bv 0(%r2) addc %r0,%r25,%r28 EPILOGUE()