| dnl ARM mpn_copyi. |
| |
| dnl Copyright 2003 Free Software Foundation, Inc. |
| |
| dnl This file is part of the GNU MP Library. |
| |
| dnl The GNU MP Library is free software; you can redistribute it and/or modify |
| dnl it under the terms of the GNU Lesser General Public License as published |
| dnl by the Free Software Foundation; either version 3 of the License, or (at |
| dnl your option) any later version. |
| |
| dnl The GNU MP Library is distributed in the hope that it will be useful, but |
| dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| dnl License for more details. |
| |
| dnl You should have received a copy of the GNU Lesser General Public License |
| dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. |
| |
| include(`../config.m4') |
| |
| C This runs at 3 cycles/limb in the StrongARM. |
| |
| define(`rp',`r0') |
| define(`up',`r1') |
| define(`n',`r2') |
| |
| |
| ASM_START() |
| PROLOGUE(mpn_copyi) |
| tst n, #1 |
| beq L(skip1) |
| ldr r3, [up], #4 |
| str r3, [rp], #4 |
| L(skip1): |
| tst n, #2 |
| beq L(skip2) |
| ldmia up!, { r3, r12 } C load 2 limbs |
| stmia rp!, { r3, r12 } C store 2 limbs |
| L(skip2): |
| bics n, n, #3 |
| beq L(return) |
| stmfd sp!, { r7, r8, r9 } C save regs on stack |
| L(loop): |
| ldmia up!, { r3, r8, r9, r12 } C load 4 limbs |
| ldr r7, [rp, #12] C cache allocate |
| subs n, n, #4 |
| stmia rp!, { r3, r8, r9, r12 } C store 4 limbs |
| bne L(loop) |
| ldmfd sp!, { r7, r8, r9 } C restore regs from stack |
| L(return): |
| mov pc, lr |
| EPILOGUE(mpn_copyi) |
