1dnl SPARC v9 mpn_rshift 2 3dnl Contributed to the GNU project by David Miller. 4 5dnl Copyright 2013 Free Software Foundation, Inc. 6 7dnl This file is part of the GNU MP Library. 8dnl 9dnl The GNU MP Library is free software; you can redistribute it and/or modify 10dnl it under the terms of either: 11dnl 12dnl * the GNU Lesser General Public License as published by the Free 13dnl Software Foundation; either version 3 of the License, or (at your 14dnl option) any later version. 15dnl 16dnl or 17dnl 18dnl * the GNU General Public License as published by the Free Software 19dnl Foundation; either version 2 of the License, or (at your option) any 20dnl later version. 21dnl 22dnl or both in parallel, as here. 23dnl 24dnl The GNU MP Library is distributed in the hope that it will be useful, but 25dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 26dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 27dnl for more details. 28dnl 29dnl You should have received copies of the GNU General Public License and the 30dnl GNU Lesser General Public License along with the GNU MP Library. If not, 31dnl see https://www.gnu.org/licenses/. 32 33include(`../config.m4') 34 35C cycles/limb 36C UltraSPARC 1&2: 2 37C UltraSPARC 3: 2.5 38C UltraSPARC T1: 17.5 39C UltraSPARC T3: 8 40C UltraSPARC T4: 3 41 42C INPUT PARAMETERS 43define(`rp', `%i0') 44define(`up', `%i1') 45define(`n', `%i2') 46define(`cnt', `%i3') 47 48define(`tcnt', `%i4') 49define(`retval', `%i5') 50define(`u0', `%l0') 51define(`u1', `%l1') 52define(`r0', `%l6') 53define(`r1', `%l7') 54define(`u0_off', `%o0') 55define(`u1_off', `%o1') 56define(`r0_off', `%o2') 57define(`r1_off', `%o3') 58 59ASM_START() 60 REGISTER(%g2,#scratch) 61 REGISTER(%g3,#scratch) 62PROLOGUE(mpn_rshift) 63 save %sp, -176, %sp 64 65 sllx n, 3, n 66 sub %g0, cnt, tcnt 67 68 add up, n, up 69 add rp, n, rp 70 71 neg n, n 72 sub up, (2 * 8), u0_off 73 sub rp, (5 * 8), r0_off 74 75 ldx [n + up], u1 C WAS: up + 0 76 sub u0_off, (1 * 8), u1_off 77 sub r0_off, (1 * 8), r1_off 78 79 subcc n, -(3 * 8), n 80 sllx u1, tcnt, retval 81 82 bg,pn %xcc, L(end12) 83 srlx u1, cnt, %l3 84 85 ldx [n + u0_off], u0 C WAS: up + 0 86 subcc n, -(2 * 8), n 87 88 ldx [n + u1_off], u1 C WAS: up + 8 89 90 bg,pn %xcc, L(end34) 91 sllx u0, tcnt, %l4 92 93 b,a L(top) 94 ALIGN(16) 95L(top): 96 srlx u0, cnt, %l2 97 or %l3, %l4, r0 98 99 ldx [n + u0_off], u0 C WAS: up + 0 100 sllx u1, tcnt, %l5 101 102 stx r0, [n + r0_off] C WAS: rp + 0 103 subcc n, -(2 * 8), n 104 105 srlx u1, cnt, %l3 106 or %l2, %l5, r1 107 108 ldx [n + u1_off], u1 C WAS: up + 8 109 sllx u0, tcnt, %l4 110 111 ble,pt %xcc, L(top) 112 stx r1, [n + r1_off] C WAS: rp + 8 113 114L(end34): 115 srlx u0, cnt, %l2 116 or %l3, %l4, r0 117 118 sllx u1, tcnt, %l5 119 stx r0, [n + r0_off] C WAS: rp + 0 120 121 or %l2, %l5, r1 122 sub n, -(2 * 8), %o5 123 124 srlx u1, cnt, %l3 125 stx r1, [%o5 + r1_off] C WAS: rp + 8 126 127L(end12): 128 andcc n, 8, %g0 129 bz,pn %xcc, L(done) 130 nop 131 132 ldx [n + u0_off], u1 133 sllx u1, tcnt, %l4 134 or %l3, %l4, r0 135 stx r0, [r0_off + 24] 136 srlx u1, cnt, %l3 137L(done): 138 stx %l3, [r0_off + 32] 139 140 ret 141 restore retval, 0, %o0 142EPILOGUE() 143