1dnl S/390-32 mpn_rshift. 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 31include(`../config.m4') 32 33C cycles/limb 34C z900 6 35C z990 3 36C z9 ? 37C z10 ? 38C z196 ? 39 40C TODO 41C * 42 43C INPUT PARAMETERS 44define(`rp', `%r2') 45define(`up', `%r3') 46define(`n', `%r4') 47define(`cnt', `%r5') 48 49ASM_START() 50PROLOGUE(mpn_rshift) 51 stm %r6, %r12, 24(%r15) 52 lhi %r8, 32 53 sr %r8, cnt 54 l %r12, 0(up) 55 sll %r12, 0(%r8) C return value 56 lhi %r7, 3 57 nr %r7, n 58 srl n, 2 59 je L(b0) 60 chi %r7, 2 61 jl L(b1) 62 je L(b2) 63 64L(b3): l %r11, 0(up) 65 l %r10, 4(up) 66 l %r8, 8(up) 67 ahi up, 8 68 lr %r9, %r10 69 srdl %r10, 0(cnt) 70 srdl %r8, 0(cnt) 71 st %r11, 0(rp) 72 st %r9, 4(rp) 73 ahi rp, 8 74 ltr n, n 75 je L(end) 76 j L(top) 77 78L(b2): l %r11, 0(up) 79 l %r10, 4(up) 80 ahi up, 4 81 srdl %r10, 0(cnt) 82 st %r11, 0(rp) 83 ahi rp, 4 84 ltr n, n 85 je L(end) 86 j L(top) 87 88L(b1): ltr n, n 89 je L(end) 90 j L(top) 91 92L(b0): l %r11, 0(up) 93 l %r9, 4(up) 94 l %r7, 8(up) 95 l %r1, 12(up) 96 ahi up, 12 97 lr %r10, %r9 98 lr %r8, %r7 99 lr %r6, %r1 100 srdl %r10, 0(cnt) 101 srdl %r8, 0(cnt) 102 srdl %r6, 0(cnt) 103 st %r11, 0(rp) 104 st %r9, 4(rp) 105 st %r7, 8(rp) 106 ahi rp, 12 107 ahi n, -1 108 je L(end) 109 110 ALIGN(8) 111L(top): l %r11, 0(up) 112 l %r9, 4(up) 113 l %r7, 8(up) 114 l %r1, 12(up) 115 l %r0, 16(up) 116 lr %r10, %r9 117 lr %r8, %r7 118 lr %r6, %r1 119 ahi up, 16 120 srdl %r10, 0(cnt) 121 srdl %r8, 0(cnt) 122 srdl %r6, 0(cnt) 123 srdl %r0, 0(cnt) 124 st %r11, 0(rp) 125 st %r9, 4(rp) 126 st %r7, 8(rp) 127 st %r1, 12(rp) 128 ahi rp, 16 129 brct n, L(top) 130 131L(end): l %r11, 0(up) 132 srl %r11, 0(cnt) 133 st %r11, 0(rp) 134 135 lr %r2, %r12 136 lm %r6, %r12, 24(%r15) 137 br %r14 138EPILOGUE() 139