| Austin Schuh | dace2a6 | 2020-08-18 10:56:48 -0700 | [diff] [blame] | 1 | dnl ARM mpn_com. |
| 2 | |
| 3 | dnl Copyright 2003, 2012 Free Software Foundation, Inc. |
| 4 | |
| 5 | dnl This file is part of the GNU MP Library. |
| 6 | dnl |
| 7 | dnl The GNU MP Library is free software; you can redistribute it and/or modify |
| 8 | dnl it under the terms of either: |
| 9 | dnl |
| 10 | dnl * the GNU Lesser General Public License as published by the Free |
| 11 | dnl Software Foundation; either version 3 of the License, or (at your |
| 12 | dnl option) any later version. |
| 13 | dnl |
| 14 | dnl or |
| 15 | dnl |
| 16 | dnl * the GNU General Public License as published by the Free Software |
| 17 | dnl Foundation; either version 2 of the License, or (at your option) any |
| 18 | dnl later version. |
| 19 | dnl |
| 20 | dnl or both in parallel, as here. |
| 21 | dnl |
| 22 | dnl The GNU MP Library is distributed in the hope that it will be useful, but |
| 23 | dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 24 | dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 25 | dnl for more details. |
| 26 | dnl |
| 27 | dnl You should have received copies of the GNU General Public License and the |
| 28 | dnl GNU Lesser General Public License along with the GNU MP Library. If not, |
| 29 | dnl see https://www.gnu.org/licenses/. |
| 30 | |
| 31 | include(`../config.m4') |
| 32 | |
| 33 | C cycles/limb |
| 34 | C StrongARM ? |
| 35 | C XScale ? |
| 36 | C Cortex-A7 ? |
| 37 | C Cortex-A8 ? |
| 38 | C Cortex-A9 2.0 |
| 39 | C Cortex-A15 1.75 |
| 40 | |
| 41 | define(`rp', `r0') |
| 42 | define(`up', `r1') |
| 43 | define(`n', `r2') |
| 44 | |
| 45 | ASM_START() |
| 46 | PROLOGUE(mpn_com) |
| 47 | tst n, #1 |
| 48 | beq L(skip1) |
| 49 | ldr r3, [up], #4 |
| 50 | mvn r3, r3 |
| 51 | str r3, [rp], #4 |
| 52 | L(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 |
| 59 | L(skip2): |
| 60 | bics n, n, #3 |
| 61 | beq L(rtn) |
| 62 | stmfd sp!, { r7, r8, r9 } C save regs on stack |
| 63 | |
| 64 | L(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 |
| 74 | L(rtn): return lr |
| 75 | EPILOGUE() |