source/libs/gmp/gmp-src/mpn/m88k/mc88110/mul_1.s

   1 ; mc88110 __gmpn_mul_1 -- Multiply a limb vector with a single limb and
   2 ; store the product in a second limb vector.
   3
   4 ; Copyright 1992, 1994, 1995, 2000 Free Software Foundation, Inc.
   5
   6 ;  This file is part of the GNU MP Library.
   7 ;
   8 ;  The GNU MP Library is free software; you can redistribute it and/or modify
   9 ;  it under the terms of either:
  10 ;
  11 ;    * the GNU Lesser General Public License as published by the Free
  12 ;      Software Foundation; either version 3 of the License, or (at your
  13 ;      option) any later version.
  14 ;
  15 ;  or
  16 ;
  17 ;    * the GNU General Public License as published by the Free Software
  18 ;      Foundation; either version 2 of the License, or (at your option) any
  19 ;      later version.
  20 ;
  21 ;  or both in parallel, as here.
  22 ;
  23 ;  The GNU MP Library is distributed in the hope that it will be useful, but
  24 ;  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  25 ;  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  26 ;  for more details.
  27 ;
  28 ;  You should have received copies of the GNU General Public License and the
  29 ;  GNU Lesser General Public License along with the GNU MP Library.  If not,
  30 ;  see https://www.gnu.org/licenses/.
  31
  32
  33 ; INPUT PARAMETERS
  34 ; res_ptr       r2
  35 ; s1_ptr        r3
  36 ; size          r4
  37 ; s2_limb       r5
  38
  39         text
  40         align   16
  41         global  ___gmpn_mul_1
  42 ___gmpn_mul_1:
  43         ; Make S1_PTR and RES_PTR point at the end of their blocks
  44         ; and negate SIZE.
  45         lda      r3,r3[r4]
  46         lda      r8,r2[r4]              ; RES_PTR in r8 since r2 is retval
  47         subu     r4,r0,r4
  48
  49         addu.co  r2,r0,r0               ; r2 = cy = 0
  50
  51         ld       r6,r3[r4]
  52         addu     r4,r4,1
  53         mulu.d   r10,r6,r5
  54         bcnd.n   eq0,r4,Lend
  55          subu    r8,r8,8
  56
  57 Loop:   ld       r6,r3[r4]
  58         addu.cio r9,r11,r2
  59         or       r2,r10,r0              ; could be avoided if unrolled
  60         addu     r4,r4,1
  61         mulu.d   r10,r6,r5
  62         bcnd.n   ne0,r4,Loop
  63          st      r9,r8[r4]
  64
  65 Lend:   addu.cio r9,r11,r2
  66         st       r9,r8,4
  67         jmp.n    r1
  68          addu.ci r2,r10,r0