| dnl ARM mpn_com. |
| |
| dnl Copyright 2003, 2012 Free Software Foundation, Inc. |
| |
| dnl This file is part of the GNU MP Library. |
| dnl |
| dnl The GNU MP Library is free software; you can redistribute it and/or modify |
| dnl it under the terms of either: |
| dnl |
| dnl * the GNU Lesser General Public License as published by the Free |
| dnl Software Foundation; either version 3 of the License, or (at your |
| dnl option) any later version. |
| dnl |
| dnl or |
| dnl |
| dnl * the GNU General Public License as published by the Free Software |
| dnl Foundation; either version 2 of the License, or (at your option) any |
| dnl later version. |
| dnl |
| dnl or both in parallel, as here. |
| dnl |
| 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 General Public License |
| dnl for more details. |
| dnl |
| dnl You should have received copies of the GNU General Public License and the |
| dnl GNU Lesser General Public License along with the GNU MP Library. If not, |
| dnl see https://www.gnu.org/licenses/. |
| |
| include(`../config.m4') |
| |
| C cycles/limb |
| C StrongARM ? |
| C XScale ? |
| C Cortex-A7 ? |
| C Cortex-A8 ? |
| C Cortex-A9 2.0 |
| C Cortex-A15 1.75 |
| |
| define(`rp', `r0') |
| define(`up', `r1') |
| define(`n', `r2') |
| |
| ASM_START() |
| PROLOGUE(mpn_com) |
| tst n, #1 |
| beq L(skip1) |
| ldr r3, [up], #4 |
| mvn r3, r3 |
| str r3, [rp], #4 |
| L(skip1): |
| tst n, #2 |
| beq L(skip2) |
| ldmia up!, { r3, r12 } C load 2 limbs |
| mvn r3, r3 |
| mvn r12, r12 |
| stmia rp!, { r3, r12 } C store 2 limbs |
| L(skip2): |
| bics n, n, #3 |
| beq L(rtn) |
| stmfd sp!, { r7, r8, r9 } C save regs on stack |
| |
| L(top): ldmia up!, { r3, r8, r9, r12 } C load 4 limbs |
| subs n, n, #4 |
| mvn r3, r3 |
| mvn r8, r8 |
| mvn r9, r9 |
| mvn r12, r12 |
| stmia rp!, { r3, r8, r9, r12 } C store 4 limbs |
| bne L(top) |
| |
| ldmfd sp!, { r7, r8, r9 } C restore regs from stack |
| L(rtn): return lr |
| EPILOGUE() |