1dnl ARM mpn_com. 2 3dnl Copyright 2003, 2012 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 StrongARM ? 35C XScale ? 36C Cortex-A7 ? 37C Cortex-A8 ? 38C Cortex-A9 2.0 39C Cortex-A15 1.75 40 41define(`rp', `r0') 42define(`up', `r1') 43define(`n', `r2') 44 45ASM_START() 46PROLOGUE(mpn_com) 47 tst n, #1 48 beq L(skip1) 49 ldr r3, [up], #4 50 mvn r3, r3 51 str r3, [rp], #4 52L(skip1): 53 tst n, #2 54 beq L(skip2) 55 ldmia up!, { r3, r12 } C load 2 limbs 56 mvn r3, r3 57 mvn r12, r12 58 stmia rp!, { r3, r12 } C store 2 limbs 59L(skip2): 60 bics n, n, #3 61 beq L(rtn) 62 stmfd sp!, { r7, r8, r9 } C save regs on stack 63 64L(top): ldmia up!, { r3, r8, r9, r12 } C load 4 limbs 65 subs n, n, #4 66 mvn r3, r3 67 mvn r8, r8 68 mvn r9, r9 69 mvn r12, r12 70 stmia rp!, { r3, r8, r9, r12 } C store 4 limbs 71 bne L(top) 72 73 ldmfd sp!, { r7, r8, r9 } C restore regs from stack 74L(rtn): return lr 75EPILOGUE() 76