1dnl HP-PA 2.0 mpn_lshift -- Left shift. 2 3dnl Copyright 1997, 2000, 2002, 2003 Free Software Foundation, Inc. 4 5dnl This file is part of the GNU MP Library. 6dnl 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of either: 9dnl 10dnl * the GNU Lesser General Public License as published by the Free 11dnl Software Foundation; either version 3 of the License, or (at your 12dnl option) any later version. 13dnl 14dnl or 15dnl 16dnl * the GNU General Public License as published by the Free Software 17dnl Foundation; either version 2 of the License, or (at your option) any 18dnl later version. 19dnl 20dnl or both in parallel, as here. 21dnl 22dnl The GNU MP Library is distributed in the hope that it will be useful, but 23dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 24dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 25dnl for more details. 26dnl 27dnl You should have received copies of the GNU General Public License and the 28dnl GNU Lesser General Public License along with the GNU MP Library. If not, 29dnl see https://www.gnu.org/licenses/. 30 31 32dnl This runs at 1.5 cycles/limb on PA8000 and 1.0 cycles/limb on PA8500. 33 34include(`../config.m4') 35 36dnl INPUT PARAMETERS 37define(`rp',`%r26') 38define(`up',`%r25') 39define(`n',`%r24') 40define(`cnt',`%r23') 41 42ifdef(`HAVE_ABI_2_0w', 43` .level 2.0w 44',` .level 2.0 45') 46PROLOGUE(mpn_lshift) 47 shladd n, 3, up, up 48 shladd n, 3, rp, rp 49 subi 64, cnt, cnt 50 mtsar cnt 51 ldd -8(up), %r21 52 addib,= -1, n, L(end) 53 shrpd %r0, %r21, %sar, %r29 C compute carry out limb 54 depw,z n, 31, 3, %r28 C r28 = (size & 7) 55 sub %r0, n, %r22 56 depw,z %r22, 28, 3, %r22 C r22 = 8 * (-size & 7) 57 add up, %r22, up C offset up 58 blr %r28, %r0 C branch into jump table 59 add rp, %r22, rp C offset rp 60 b L(0) 61 nop 62 b L(1) 63 copy %r21, %r20 64 b L(2) 65 nop 66 b L(3) 67 copy %r21, %r20 68 b L(4) 69 nop 70 b L(5) 71 copy %r21, %r20 72 b L(6) 73 nop 74 b L(7) 75 copy %r21, %r20 76 77LDEF(loop) 78LDEF(0) ldd -16(up), %r20 79 shrpd %r21, %r20, %sar, %r21 80 std %r21, -8(rp) 81LDEF(7) ldd -24(up), %r21 82 shrpd %r20, %r21, %sar, %r20 83 std %r20, -16(rp) 84LDEF(6) ldd -32(up), %r20 85 shrpd %r21, %r20, %sar, %r21 86 std %r21, -24(rp) 87LDEF(5) ldd -40(up), %r21 88 shrpd %r20, %r21, %sar, %r20 89 std %r20, -32(rp) 90LDEF(4) ldd -48(up), %r20 91 shrpd %r21, %r20, %sar, %r21 92 std %r21, -40(rp) 93LDEF(3) ldd -56(up), %r21 94 shrpd %r20, %r21, %sar, %r20 95 std %r20, -48(rp) 96LDEF(2) ldd -64(up), %r20 97 shrpd %r21, %r20, %sar, %r21 98 std %r21, -56(rp) 99LDEF(1) ldd -72(up), %r21 100 ldo -64(up), up 101 shrpd %r20, %r21, %sar, %r20 102 std %r20, -64(rp) 103 addib,> -8, n, L(loop) 104 ldo -64(rp), rp 105 106LDEF(end) 107 shrpd %r21, %r0, %sar, %r21 108 std %r21, -8(rp) 109 bve (%r2) 110ifdef(`HAVE_ABI_2_0w', 111` copy %r29,%r28 112',` extrd,u %r29, 31, 32, %r28 113') 114EPILOGUE(mpn_lshift) 115