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. 6 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of the GNU Lesser General Public License as published 9dnl by the Free Software Foundation; either version 3 of the License, or (at 10dnl your option) any later version. 11 12dnl The GNU MP Library is distributed in the hope that it will be useful, but 13dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15dnl License for more details. 16 17dnl You should have received a copy of the GNU Lesser General Public License 18dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. 19 20include(`../config.m4') 21 22C cycles/limb 23C z900 6 24C z990 3 25C z9 ? 26C z10 ? 27C z196 ? 28 29C TODO 30C * 31 32C INPUT PARAMETERS 33define(`rp', `%r2') 34define(`up', `%r3') 35define(`n', `%r4') 36define(`cnt', `%r5') 37 38ASM_START() 39PROLOGUE(mpn_rshift) 40 stm %r6, %r12, 24(%r15) 41 lhi %r8, 32 42 sr %r8, cnt 43 l %r12, 0(up) 44 sll %r12, 0(%r8) C return value 45 lhi %r7, 3 46 nr %r7, n 47 srl n, 2 48 je L(b0) 49 chi %r7, 2 50 jl L(b1) 51 je L(b2) 52 53L(b3): l %r11, 0(up) 54 l %r10, 4(up) 55 l %r8, 8(up) 56 ahi up, 8 57 lr %r9, %r10 58 srdl %r10, 0(cnt) 59 srdl %r8, 0(cnt) 60 st %r11, 0(rp) 61 st %r9, 4(rp) 62 ahi rp, 8 63 ltr n, n 64 je L(end) 65 j L(top) 66 67L(b2): l %r11, 0(up) 68 l %r10, 4(up) 69 ahi up, 4 70 srdl %r10, 0(cnt) 71 st %r11, 0(rp) 72 ahi rp, 4 73 ltr n, n 74 je L(end) 75 j L(top) 76 77L(b1): ltr n, n 78 je L(end) 79 j L(top) 80 81L(b0): l %r11, 0(up) 82 l %r9, 4(up) 83 l %r7, 8(up) 84 l %r1, 12(up) 85 ahi up, 12 86 lr %r10, %r9 87 lr %r8, %r7 88 lr %r6, %r1 89 srdl %r10, 0(cnt) 90 srdl %r8, 0(cnt) 91 srdl %r6, 0(cnt) 92 st %r11, 0(rp) 93 st %r9, 4(rp) 94 st %r7, 8(rp) 95 ahi rp, 12 96 ahi n, -1 97 je L(end) 98 99 ALIGN(8) 100L(top): l %r11, 0(up) 101 l %r9, 4(up) 102 l %r7, 8(up) 103 l %r1, 12(up) 104 l %r0, 16(up) 105 lr %r10, %r9 106 lr %r8, %r7 107 lr %r6, %r1 108 ahi up, 16 109 srdl %r10, 0(cnt) 110 srdl %r8, 0(cnt) 111 srdl %r6, 0(cnt) 112 srdl %r0, 0(cnt) 113 st %r11, 0(rp) 114 st %r9, 4(rp) 115 st %r7, 8(rp) 116 st %r1, 12(rp) 117 ahi rp, 16 118 brct n, L(top) 119 120L(end): l %r11, 0(up) 121 srl %r11, 0(cnt) 122 st %r11, 0(rp) 123 124 lr %r2, %r12 125 lm %r6, %r12, 24(%r15) 126 br %r14 127EPILOGUE() 128