1dnl S/390-32 mpn_lshift. 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_lshift) 40 lr %r1, n 41 sll %r1, 2 42 stm %r6, %r12, 24(%r15) 43 la up, 0(%r1,up) C put up near end of U 44 la rp, 0(%r1,rp) C put rp near end of R 45 ahi up, -20 46 ahi rp, -16 47 lhi %r8, 32 48 sr %r8, cnt 49 l %r12, 16(up) 50 srl %r12, 0(%r8) C return value 51 lhi %r7, 3 52 nr %r7, n 53 srl n, 2 54 je L(b0) 55 chi %r7, 2 56 jl L(b1) 57 je L(b2) 58 59L(b3): l %r10, 16(up) 60 l %r11, 12(up) 61 l %r9, 8(up) 62 ahi up, -8 63 lr %r8, %r11 64 sldl %r10, 0(cnt) 65 sldl %r8, 0(cnt) 66 st %r10, 12(rp) 67 st %r8, 8(rp) 68 ahi rp, -8 69 ltr n, n 70 je L(end) 71 j L(top) 72 73L(b2): l %r10, 16(up) 74 l %r11, 12(up) 75 ahi up, -4 76 sldl %r10, 0(cnt) 77 st %r10, 12(rp) 78 ahi rp, -4 79 ltr n, n 80 je L(end) 81 j L(top) 82 83L(b1): ltr n, n 84 je L(end) 85 j L(top) 86 87L(b0): l %r10,16(up) 88 l %r8, 12(up) 89 l %r6, 8(up) 90 l %r0, 4(up) 91 ahi up, -12 92 lr %r11, %r8 93 lr %r9, %r6 94 lr %r7, %r0 95 sldl %r10,0(cnt) 96 sldl %r8, 0(cnt) 97 sldl %r6, 0(cnt) 98 st %r10, 12(rp) 99 st %r8, 8(rp) 100 st %r6, 4(rp) 101 ahi rp, -12 102 ahi n, -1 103 je L(end) 104 105 ALIGN(8) 106L(top): l %r10, 16(up) 107 l %r8, 12(up) 108 l %r6, 8(up) 109 l %r0, 4(up) 110 l %r1, 0(up) 111 lr %r11, %r8 112 lr %r9, %r6 113 lr %r7, %r0 114 ahi up, -16 115 sldl %r10, 0(cnt) 116 sldl %r8, 0(cnt) 117 sldl %r6, 0(cnt) 118 sldl %r0, 0(cnt) 119 st %r10, 12(rp) 120 st %r8, 8(rp) 121 st %r6, 4(rp) 122 st %r0, 0(rp) 123 ahi rp, -16 124 brct n, L(top) 125 126L(end): l %r10, 16(up) 127 sll %r10, 0(cnt) 128 st %r10, 12(rp) 129 130 lr %r2, %r12 131 lm %r6, %r12, 24(%r15) 132 br %r14 133EPILOGUE() 134