udiv.asm
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上传日期:2022-08-06
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文件大小:6k
- 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 3 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. If not, see http://www.gnu.org/licenses/.
- 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()