source/libs/gmp/gmp-src/mpn/powerpc64/mode32/mul_1.asm

   1 dnl  PowerPC-64 mpn_mul_1 -- Multiply a limb vector with a limb and add
   2 dnl  the result to a second limb vector.
   3
   4 dnl  Copyright 1999-2001, 2003, 2005 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 include(`../config.m4')
  33
  34 C               cycles/limb
  35 C POWER3/PPC630:     ?
  36 C POWER4/PPC970:     10
  37
  38 C INPUT PARAMETERS
  39 C rp    r3
  40 C up    r4
  41 C n     r5
  42 C v     r6,r7  or  r7,r8
  43
  44 ASM_START()
  45 PROLOGUE(mpn_mul_1)
  46
  47 ifdef(`BROKEN_LONGLONG_PARAM',
  48 `       rldimi  r8, r7, 32,0    C assemble vlimb from separate 32-bit arguments
  49         mr      r6, r8
  50 ',`
  51         rldimi  r7, r6, 32,0    C assemble vlimb from separate 32-bit arguments
  52         mr      r6, r7
  53 ')
  54         li      r7, 0           C cy_limb = 0
  55         mtctr   r5
  56         addic   r0, r0, 0
  57         addi    r3, r3, -8
  58         addi    r4, r4, -8
  59
  60 L(oop): ldu     r0, 8(r4)
  61         mulld   r9, r0, r6
  62         adde    r12, r9, r7     C add old high limb and new low limb
  63         srdi    r5, r9, 32
  64         srdi    r11, r7, 32
  65         adde    r5, r5, r11     C add high limb parts, set cy
  66         mulhdu  r7, r0, r6
  67         stdu    r12, 8(r3)
  68         bdnz    L(oop)
  69
  70         addze   r4, r7
  71         srdi    r3, r4, 32
  72         blr
  73 EPILOGUE()