source/libs/gmp/gmp-src/mpn/sparc32/v8/submul_1.asm

   1 dnl  SPARC v8 mpn_submul_1 -- Multiply a limb vector with a limb and
   2 dnl  subtract the result from a second limb vector.
   3
   4 dnl  Copyright 1992-1994, 2000 Free Software Foundation, Inc.
   5
   6 dnl  This file is part of the GNU MP Library.
   7 dnl
   8 dnl  The GNU MP Library is free software; you can redistribute it and/or modify
   9 dnl  it under the terms of either:
  10 dnl
  11 dnl    * the GNU Lesser General Public License as published by the Free
  12 dnl      Software Foundation; either version 3 of the License, or (at your
  13 dnl      option) any later version.
  14 dnl
  15 dnl  or
  16 dnl
  17 dnl    * the GNU General Public License as published by the Free Software
  18 dnl      Foundation; either version 2 of the License, or (at your option) any
  19 dnl      later version.
  20 dnl
  21 dnl  or both in parallel, as here.
  22 dnl
  23 dnl  The GNU MP Library is distributed in the hope that it will be useful, but
  24 dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  25 dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  26 dnl  for more details.
  27 dnl
  28 dnl  You should have received copies of the GNU General Public License and the
  29 dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
  30 dnl  see https://www.gnu.org/licenses/.
  31
  32
  33 include(`../config.m4')
  34
  35 C INPUT PARAMETERS
  36 C res_ptr       o0
  37 C s1_ptr        o1
  38 C size          o2
  39 C s2_limb       o3
  40
  41 ASM_START()
  42 PROLOGUE(mpn_submul_1)
  43         sub     %g0,%o2,%o2             C negate ...
  44         sll     %o2,2,%o2               C ... and scale size
  45         sub     %o1,%o2,%o1             C o1 is offset s1_ptr
  46         sub     %o0,%o2,%g1             C g1 is offset res_ptr
  47
  48         mov     0,%o0                   C clear cy_limb
  49
  50 L(loop):
  51         ld      [%o1+%o2],%o4
  52         ld      [%g1+%o2],%g2
  53         umul    %o4,%o3,%o5
  54         rd      %y,%g3
  55         addcc   %o5,%o0,%o5
  56         addx    %g3,0,%o0
  57         subcc   %g2,%o5,%g2
  58         addx    %o0,0,%o0
  59         st      %g2,[%g1+%o2]
  60
  61         addcc   %o2,4,%o2
  62         bne     L(loop)
  63          nop
  64
  65         retl
  66          nop
  67 EPILOGUE(mpn_submul_1)