sysdeps/sparc/sparc32/sparcv8/mul_1.S

   1 ! SPARC v8 __mpn_mul_1 -- Multiply a limb vector with a single limb and
   2 ! store the product in a second limb vector.
   3
   4 ! Copyright (C) 1992-2019 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 the GNU Lesser General Public License as published by
  10 ! the Free Software Foundation; either version 2.1 of the License, or (at your
  11 ! option) any later version.
  12
  13 ! The GNU MP Library is distributed in the hope that it will be useful, but
  14 ! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15 ! or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  16 ! License for more details.
  17
  18 ! You should have received a copy of the GNU Lesser General Public License
  19 ! along with the GNU MP Library; see the file COPYING.LIB.  If not,
  20 ! see <http://www.gnu.org/licenses/>.
  21
  22
  23 ! INPUT PARAMETERS
  24 ! res_ptr       o0
  25 ! s1_ptr        o1
  26 ! size          o2
  27 ! s2_limb       o3
  28
  29 #include <sysdep.h>
  30
  31 ENTRY(__mpn_mul_1)
  32         sll     %o2,4,%g1
  33         mov     %o7,%g4                 ! Save return address register
  34         and     %g1,(4-1)<<4,%g1
  35 1:      call    2f
  36          add    %o7,3f-1b,%g3
  37 2:      mov     %g4,%o7                 ! Restore return address register
  38         jmp     %g3+%g1
  39          ld     [%o1+0],%o4     ! 1
  40
  41         .align  4
  42 3:
  43 LOC(00):
  44         add     %o0,-4,%o0
  45         add     %o1,-4,%o1
  46         b       LOC(loop00)             /* 4, 8, 12, ... */
  47          orcc   %g0,%g0,%g2
  48 LOC(01):
  49         b       LOC(loop01)             /* 1, 5, 9, ... */
  50          orcc   %g0,%g0,%g2
  51         nop
  52         nop
  53 LOC(10):
  54         add     %o0,-12,%o0     /* 2, 6, 10, ... */
  55         add     %o1,4,%o1
  56         b       LOC(loop10)
  57          orcc   %g0,%g0,%g2
  58         nop
  59 LOC(11):
  60         add     %o0,-8,%o0      /* 3, 7, 11, ... */
  61         add     %o1,-8,%o1
  62         b       LOC(loop11)
  63          orcc   %g0,%g0,%g2
  64
  65 LOC(loop):
  66         addcc   %g3,%g2,%g3     ! 1
  67         ld      [%o1+4],%o4     ! 2
  68         st      %g3,[%o0+0]     ! 1
  69         rd      %y,%g2          ! 1
  70 LOC(loop00):
  71         umul    %o4,%o3,%g3     ! 2
  72         addxcc  %g3,%g2,%g3     ! 2
  73         ld      [%o1+8],%o4     ! 3
  74         st      %g3,[%o0+4]     ! 2
  75         rd      %y,%g2          ! 2
  76 LOC(loop11):
  77         umul    %o4,%o3,%g3     ! 3
  78         addxcc  %g3,%g2,%g3     ! 3
  79         ld      [%o1+12],%o4    ! 4
  80         add     %o1,16,%o1
  81         st      %g3,[%o0+8]     ! 3
  82         rd      %y,%g2          ! 3
  83 LOC(loop10):
  84         umul    %o4,%o3,%g3     ! 4
  85         addxcc  %g3,%g2,%g3     ! 4
  86         ld      [%o1+0],%o4     ! 1
  87         st      %g3,[%o0+12]    ! 4
  88         add     %o0,16,%o0
  89         rd      %y,%g2          ! 4
  90         addx    %g0,%g2,%g2
  91 LOC(loop01):
  92         addcc   %o2,-4,%o2
  93         bg      LOC(loop)
  94          umul   %o4,%o3,%g3     ! 1
  95
  96         addcc   %g3,%g2,%g3     ! 4
  97         st      %g3,[%o0+0]     ! 4
  98         rd      %y,%g2          ! 4
  99         retl
 100          addx   %g0,%g2,%o0
 101
 102 END(__mpn_mul_1)