source/libs/gmp/gmp-src/mpn/powerpc64/p7/hamdist.asm

   1 dnl  PowerPC-64 mpn_hamdist.
   2
   3 dnl  Copyright 2012 Free Software Foundation, Inc.
   4
   5 dnl  This file is part of the GNU MP Library.
   6 dnl
   7 dnl  The GNU MP Library is free software; you can redistribute it and/or modify
   8 dnl  it under the terms of either:
   9 dnl
  10 dnl    * the GNU Lesser General Public License as published by the Free
  11 dnl      Software Foundation; either version 3 of the License, or (at your
  12 dnl      option) any later version.
  13 dnl
  14 dnl  or
  15 dnl
  16 dnl    * the GNU General Public License as published by the Free Software
  17 dnl      Foundation; either version 2 of the License, or (at your option) any
  18 dnl      later version.
  19 dnl
  20 dnl  or both in parallel, as here.
  21 dnl
  22 dnl  The GNU MP Library is distributed in the hope that it will be useful, but
  23 dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  24 dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  25 dnl  for more details.
  26 dnl
  27 dnl  You should have received copies of the GNU General Public License and the
  28 dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
  29 dnl  see https://www.gnu.org/licenses/.
  30
  31 include(`../config.m4')
  32
  33 C                   cycles/limb
  34 C POWER3/PPC630          -
  35 C POWER4/PPC970          -
  36 C POWER5                 -
  37 C POWER6                 -
  38 C POWER7                 2.87
  39
  40 define(`up', r3)
  41 define(`vp', r4)
  42 define(`n',  r5)
  43
  44 ASM_START()
  45 PROLOGUE(mpn_hamdist)
  46         std     r30, -16(r1)
  47         std     r31, -8(r1)
  48
  49         addi    r0, n, 1
  50 ifdef(`HAVE_ABI_mode32',
  51 `       rldicl  r0, r0, 63,33', C ...branch count
  52 `       srdi    r0, r0, 1')     C ...for ctr
  53         mtctr   r0
  54
  55         andi.   r0, n, 1
  56
  57         li      r0, 0
  58         li      r12, 0
  59
  60         beq     L(evn)
  61
  62 L(odd): ld      r6, 0(up)
  63         addi    up, up, 8
  64         ld      r8, 0(vp)
  65         addi    vp, vp, 8
  66         xor     r10, r6, r8
  67         popcntd r0, r10
  68         bdz     L(e1)
  69
  70 L(evn): ld      r6, 0(up)
  71         ld      r8, 0(vp)
  72         ld      r7, 8(up)
  73         ld      r9, 8(vp)
  74         xor     r10, r6, r8
  75         addi    up, up, 16
  76         addi    vp, vp, 16
  77         li      r30, 0
  78         li      r31, 0
  79         bdz     L(end)
  80
  81         nop
  82         nop
  83 C       ALIGN(16)
  84 L(top): add     r0, r0, r30
  85         ld      r6, 0(up)
  86         ld      r8, 0(vp)
  87         xor     r11, r7, r9
  88         popcntd r30, r10
  89         add     r12, r12, r31
  90         ld      r7, 8(up)
  91         ld      r9, 8(vp)
  92         xor     r10, r6, r8
  93         popcntd r31, r11
  94         addi    up, up, 16
  95         addi    vp, vp, 16
  96         bdnz    L(top)
  97
  98 L(end): add     r0, r0, r30
  99         xor     r11, r7, r9
 100         popcntd r30, r10
 101         add     r12, r12, r31
 102         popcntd r31, r11
 103
 104         add     r0, r0, r30
 105         add     r12, r12, r31
 106 L(e1):  add     r3, r0, r12
 107         ld      r30, -16(r1)
 108         ld      r31, -8(r1)
 109         blr
 110 EPILOGUE()