1dnl PowerPC-32 mpn_sec_tabselect. 2 3dnl Contributed to the GNU project by Torbj��rn Granlund. 4 5dnl Copyright 2011-2013 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 603e: ? 37C 604e: ? 38C 75x (G3): ? 39C 7400,7410 (G4): 2.5 40C 744x,745x (G4+): 2.0 41C power4/ppc970: 2.0 42C power5: ? 43 44define(`rp', `r3') 45define(`tp', `r4') 46define(`n', `r5') 47define(`nents', `r6') 48define(`which', `r7') 49 50define(`i', `r8') 51define(`j', `r9') 52define(`stride', `r12') 53define(`mask', `r11') 54 55 56ASM_START() 57PROLOGUE(mpn_sec_tabselect) 58 stwu r1, -32(r1) 59 addic. j, n, -4 C outer loop induction variable 60 stmw r27, 8(r1) 61 slwi stride, n, 2 62 63 blt cr0, L(outer_end) 64L(outer_top): 65 mtctr nents 66 mr r10, tp 67 li r28, 0 68 li r29, 0 69 li r30, 0 70 li r31, 0 71 addic. j, j, -4 C outer loop induction variable 72 mr i, which 73 74 ALIGN(16) 75L(top): addic i, i, -1 C set carry iff i != 0 76 subfe mask, mask, mask 77 lwz r0, 0(tp) 78 lwz r27, 4(tp) 79 and r0, r0, mask 80 and r27, r27, mask 81 or r28, r28, r0 82 or r29, r29, r27 83 lwz r0, 8(tp) 84 lwz r27, 12(tp) 85 and r0, r0, mask 86 and r27, r27, mask 87 or r30, r30, r0 88 or r31, r31, r27 89 add tp, tp, stride 90 bdnz L(top) 91 92 stw r28, 0(rp) 93 stw r29, 4(rp) 94 stw r30, 8(rp) 95 stw r31, 12(rp) 96 addi tp, r10, 16 97 addi rp, rp, 16 98 bge cr0, L(outer_top) 99L(outer_end): 100 101 andi. r0, n, 2 102 beq cr0, L(b0x) 103L(b1x): mtctr nents 104 mr r10, tp 105 li r28, 0 106 li r29, 0 107 mr i, which 108 ALIGN(16) 109L(tp2): addic i, i, -1 110 subfe mask, mask, mask 111 lwz r0, 0(tp) 112 lwz r27, 4(tp) 113 and r0, r0, mask 114 and r27, r27, mask 115 or r28, r28, r0 116 or r29, r29, r27 117 add tp, tp, stride 118 bdnz L(tp2) 119 stw r28, 0(rp) 120 stw r29, 4(rp) 121 addi tp, r10, 8 122 addi rp, rp, 8 123 124L(b0x): andi. r0, n, 1 125 beq cr0, L(b00) 126L(b01): mtctr nents 127 mr r10, tp 128 li r28, 0 129 mr i, which 130 ALIGN(16) 131L(tp1): addic i, i, -1 132 subfe mask, mask, mask 133 lwz r0, 0(tp) 134 and r0, r0, mask 135 or r28, r28, r0 136 add tp, tp, stride 137 bdnz L(tp1) 138 stw r28, 0(rp) 139 140L(b00): lmw r27, 8(r1) 141 addi r1, r1, 32 142 blr 143EPILOGUE() 144