diff options
Diffstat (limited to 'sysdeps/hppa/udiv_qrnnd.s')
| -rw-r--r-- | sysdeps/hppa/udiv_qrnnd.s | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/sysdeps/hppa/udiv_qrnnd.s b/sysdeps/hppa/udiv_qrnnd.s new file mode 100644 index 0000000000..0b069bf7f9 --- /dev/null +++ b/sysdeps/hppa/udiv_qrnnd.s @@ -0,0 +1,285 @@ +; HP-PA __udiv_qrnnd division support, used from longlong.h. +; This version runs fast on pre-PA7000 CPUs. + +; Copyright (C) 1993, 1994 Free Software Foundation, Inc. + +; This file is part of the GNU MP Library. + +; The GNU MP Library is free software; you can redistribute it and/or modify +; it under the terms of the GNU Library General Public License as published by +; the Free Software Foundation; either version 2 of the License, or (at your +; option) any later version. + +; The GNU MP Library is distributed in the hope that it will be useful, but +; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public +; License for more details. + +; You should have received a copy of the GNU Library General Public License +; along with the GNU MP Library; see the file COPYING.LIB. If not, write to +; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + +; INPUT PARAMETERS +; rem_ptr gr26 +; n1 gr25 +; n0 gr24 +; d gr23 + +; The code size is a bit excessive. We could merge the last two ds;addc +; sequences by simply moving the "bb,< Odd" instruction down. The only +; trouble is the FFFFFFFF code that would need some hacking. + + .code + .export __udiv_qrnnd +__udiv_qrnnd + .proc + .callinfo frame=0,no_calls + .entry + + comb,< %r23,0,L$largedivisor + sub %r0,%r23,%r1 ; clear cy as side-effect + ds %r0,%r1,%r0 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r24 + ds %r25,%r23,%r25 + addc %r24,%r24,%r28 + ds %r25,%r23,%r25 + comclr,>= %r25,%r0,%r0 + addl %r25,%r23,%r25 + stws %r25,0(0,%r26) + bv 0(%r2) + addc %r28,%r28,%r28 + +L$largedivisor + extru %r24,31,1,%r19 ; r19 = n0 & 1 + bb,< %r23,31,L$odd + extru %r23,30,31,%r22 ; r22 = d >> 1 + shd %r25,%r24,1,%r24 ; r24 = new n0 + extru %r25,30,31,%r25 ; r25 = new n1 + sub %r0,%r22,%r21 + ds %r0,%r21,%r0 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + comclr,>= %r25,%r0,%r0 + addl %r25,%r22,%r25 + sh1addl %r25,%r19,%r25 + stws %r25,0(0,%r26) + bv 0(%r2) + addc %r24,%r24,%r28 + +L$odd addib,sv,n 1,%r22,L$FF.. ; r22 = (d / 2 + 1) + shd %r25,%r24,1,%r24 ; r24 = new n0 + extru %r25,30,31,%r25 ; r25 = new n1 + sub %r0,%r22,%r21 + ds %r0,%r21,%r0 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r24 + ds %r25,%r22,%r25 + addc %r24,%r24,%r28 + comclr,>= %r25,%r0,%r0 + addl %r25,%r22,%r25 + sh1addl %r25,%r19,%r25 +; We have computed (n1,,n0) / (d + 1), q' = r28, r' = r25 + add,nuv %r28,%r25,%r25 + addl %r25,%r1,%r25 + addc %r0,%r28,%r28 + sub,<< %r25,%r23,%r0 + addl %r25,%r1,%r25 + stws %r25,0(0,%r26) + bv 0(%r2) + addc %r0,%r28,%r28 + +; This is just a special case of the code above. +; We come here when d == 0xFFFFFFFF +L$FF.. 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 + + .exit + .procend |