1dnl S/390-64 mpn_copyd 2 3dnl Copyright 2011 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 32include(`../config.m4') 33 34C cycles/limb 35C z900 2.67 36C z990 1.5 37C z9 ? 38C z10 1.8 39C z196 ? 40 41C FIXME: 42C * Avoid saving/restoring callee-saves registers for n < 3. This could be 43C done by setting rp=r1, up=r2, i=r0 and r3,r4,r5 for clock regs. 44C We could then use r3...r10 in main loop. 45C * Could we use some EX trick, modifying lmg/stmg, for the feed-in code? 46 47C INPUT PARAMETERS 48define(`rp_param', `%r2') 49define(`up_param', `%r3') 50define(`n', `%r4') 51 52define(`rp', `%r8') 53define(`up', `%r9') 54 55ASM_START() 56PROLOGUE(mpn_copyd) 57 stmg %r6, %r11, 48(%r15) 58 59 sllg %r1, n, 3 60 la %r10, 8(n) 61 aghi %r1, -64 62 srlg %r10, %r10, 3 63 lghi %r11, -64 64 65 la rp, 0(%r1,rp_param) C FIXME use lay on z990 and later 66 la up, 0(%r1,up_param) C FIXME use lay on z990 and later 67 68 lghi %r7, 7 69 ngr %r7, n C n mod 8 70 cghi %r7, 2 71 jh L(b34567) 72 cghi %r7, 1 73 je L(b1) 74 jh L(b2) 75 76L(b0): brctg %r10, L(top) 77 j L(end) 78 79L(b1): lg %r0, 56(up) 80 aghi up, -8 81 stg %r0, 56(rp) 82 aghi rp, -8 83 brctg %r10, L(top) 84 j L(end) 85 86L(b2): lmg %r0, %r1, 48(up) 87 aghi up, -16 88 stmg %r0, %r1, 48(rp) 89 aghi rp, -16 90 brctg %r10, L(top) 91 j L(end) 92 93L(b34567): 94 cghi %r7, 4 95 jl L(b3) 96 je L(b4) 97 cghi %r7, 6 98 je L(b6) 99 jh L(b7) 100 101L(b5): lmg %r0, %r4, 24(up) 102 aghi up, -40 103 stmg %r0, %r4, 24(rp) 104 aghi rp, -40 105 brctg %r10, L(top) 106 j L(end) 107 108L(b3): lmg %r0, %r2, 40(up) 109 aghi up, -24 110 stmg %r0, %r2, 40(rp) 111 aghi rp, -24 112 brctg %r10, L(top) 113 j L(end) 114 115L(b4): lmg %r0, %r3, 32(up) 116 aghi up, -32 117 stmg %r0, %r3, 32(rp) 118 aghi rp, -32 119 brctg %r10, L(top) 120 j L(end) 121 122L(b6): lmg %r0, %r5, 16(up) 123 aghi up, -48 124 stmg %r0, %r5, 16(rp) 125 aghi rp, -48 126 brctg %r10, L(top) 127 j L(end) 128 129L(b7): lmg %r0, %r6, 8(up) 130 aghi up, -56 131 stmg %r0, %r6, 8(rp) 132 aghi rp, -56 133 brctg %r10, L(top) 134 j L(end) 135 136L(top): lmg %r0, %r7, 0(up) 137 la up, 0(%r11,up) 138 stmg %r0, %r7, 0(rp) 139 la rp, 0(%r11,rp) 140 brctg %r10, L(top) 141 142L(end): lmg %r6, %r11, 48(%r15) 143 br %r14 144EPILOGUE() 145