source/libs/gmp/gmp-src/mpn/alpha/sec_tabselect.asm

   1 dnl  Alpha mpn_sec_tabselect.
   2
   3 dnl  Contributed to the GNU project by Torbjörn Granlund.
   4
   5 dnl  Copyright 2011-2013 Free Software Foundation, Inc.
   6
   7 dnl  This file is part of the GNU MP Library.
   8 dnl
   9 dnl  The GNU MP Library is free software; you can redistribute it and/or modify
  10 dnl  it under the terms of either:
  11 dnl
  12 dnl    * the GNU Lesser General Public License as published by the Free
  13 dnl      Software Foundation; either version 3 of the License, or (at your
  14 dnl      option) any later version.
  15 dnl
  16 dnl  or
  17 dnl
  18 dnl    * the GNU General Public License as published by the Free Software
  19 dnl      Foundation; either version 2 of the License, or (at your option) any
  20 dnl      later version.
  21 dnl
  22 dnl  or both in parallel, as here.
  23 dnl
  24 dnl  The GNU MP Library is distributed in the hope that it will be useful, but
  25 dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  26 dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  27 dnl  for more details.
  28 dnl
  29 dnl  You should have received copies of the GNU General Public License and the
  30 dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
  31 dnl  see https://www.gnu.org/licenses/.
  32
  33 include(`../config.m4')
  34
  35 C      cycles/limb
  36 C EV4:      ?
  37 C EV5:      2.25
  38 C EV6:      1.64
  39
  40 define(`rp',     `r16')
  41 define(`tp',     `r17')
  42 define(`n',      `r18')
  43 define(`nents',  `r19')
  44 define(`which',  `r20')
  45
  46 define(`i',      `r21')
  47 define(`j',      `r22')
  48 define(`stride', `r23')
  49 define(`mask',   `r24')
  50 define(`k',      `r25')
  51
  52
  53 ASM_START()
  54 PROLOGUE(mpn_sec_tabselect)
  55         subq    n, 4, j                 C outer loop induction variable
  56
  57         blt     j, L(outer_end)
  58 L(outer_top):
  59         mov     tp, r8
  60         lda     r0, 0(r31)
  61         lda     r1, 0(r31)
  62         lda     r2, 0(r31)
  63         lda     r3, 0(r31)
  64         subq    j, 4, j                 C outer loop induction variable
  65         subq    nents, which, k
  66         mov     nents, i
  67
  68         ALIGN(16)
  69 L(top): ldq     r4, 0(tp)
  70         ldq     r5, 8(tp)
  71         cmpeq   k, i, mask
  72         subq    i, 1, i
  73         subq    r31, mask, mask
  74         ldq     r6, 16(tp)
  75         ldq     r7, 24(tp)
  76         and     r4, mask, r4
  77         and     r5, mask, r5
  78         or      r0, r4, r0
  79         or      r1, r5, r1
  80         and     r6, mask, r6
  81         and     r7, mask, r7
  82         or      r2, r6, r2
  83         or      r3, r7, r3
  84         s8addq  n, tp, tp
  85         bne     i, L(top)
  86
  87         stq     r0, 0(rp)
  88         stq     r1, 8(rp)
  89         stq     r2, 16(rp)
  90         stq     r3, 24(rp)
  91         addq    r8, 32, tp
  92         addq    rp, 32, rp
  93         bge     j, L(outer_top)
  94 L(outer_end):
  95
  96         and     n, 2, r0
  97         beq     r0, L(b0x)
  98 L(b1x): mov     tp, r8
  99         lda     r0, 0(r31)
 100         lda     r1, 0(r31)
 101         subq    nents, which, k
 102         mov     nents, i
 103         ALIGN(16)
 104 L(tp2): ldq     r4, 0(tp)
 105         ldq     r5, 8(tp)
 106         cmpeq   k, i, mask
 107         subq    i, 1, i
 108         subq    r31, mask, mask
 109         and     r4, mask, r4
 110         and     r5, mask, r5
 111         or      r0, r4, r0
 112         or      r1, r5, r1
 113         s8addq  n, tp, tp
 114         bne     i, L(tp2)
 115         stq     r0, 0(rp)
 116         stq     r1, 8(rp)
 117         addq    r8, 16, tp
 118         addq    rp, 16, rp
 119
 120 L(b0x): and     n, 1, r0
 121         beq     r0, L(b00)
 122 L(b01): lda     r0, 0(r31)
 123         subq    nents, which, k
 124         mov     nents, i
 125         ALIGN(16)
 126 L(tp1): ldq     r4, 0(tp)
 127         cmpeq   k, i, mask
 128         subq    i, 1, i
 129         subq    r31, mask, mask
 130         and     r4, mask, r4
 131         or      r0, r4, r0
 132         s8addq  n, tp, tp
 133         bne     i, L(tp1)
 134         stq     r0, 0(rp)
 135
 136 L(b00): ret     r31, (r26), 1
 137 EPILOGUE()