diff options
| author | Nicolas Boichat <drinkcat@chromium.org> | 2019-05-09 14:15:36 +0900 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-03-25 02:13:31 +0000 |
| commit | 509f29d6ce3d684f4c21a02f49f76e08353110f1 (patch) | |
| tree | 8046062a964262b2f2c6cba44c611066ac250feb /core/cortex-m0/lmul.S | |
| parent | c830ecc1f728b722fde24a5da14a89f9223f291c (diff) | |
| download | chrome-ec-509f29d6ce3d684f4c21a02f49f76e08353110f1.tar.gz | |
core/cortex-m[0]: Move core functions assembly files to third_party
The code originally comes from libaeabi-cortexm0. It is unclear
which exact git commit the code comes from, but since we have used
it without issue for 5 years, it is reliable, and a refresh is
probably not required at this stage.
BRANCH=none
BUG=chromium:884905
TEST=make buildall -j, which also include basic tests.
Change-Id: I910c1c4e6a46b2f0fe8b7a429f1b6f0f50c2dc21
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1599762
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Diffstat (limited to 'core/cortex-m0/lmul.S')
| l---------[-rw-r--r--] | core/cortex-m0/lmul.S | 66 |
1 files changed, 1 insertions, 65 deletions
diff --git a/core/cortex-m0/lmul.S b/core/cortex-m0/lmul.S index ab04fd488f..ab5bfc3cb2 100644..120000 --- a/core/cortex-m0/lmul.S +++ b/core/cortex-m0/lmul.S @@ -1,65 +1 @@ -/* Runtime ABI for the ARM Cortex-M0 - * lmul.S: 64 bit multiplication - * - * Copyright (c) 2013 Jörg Mische <bobbl@gmx.de> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT - * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - - - - .syntax unified - .text - .thumb - .cpu cortex-m0 - - - -@ long long __aeabi_lmul(long long r1:r0, long long r3:r2) -@ -@ Multiply r1:r0 and r3:r2 and return the product in r1:r0 -@ Can also be used for unsigned long product -@ - .thumb_func - .section .text.__aeabi_lmul - .global __aeabi_lmul -__aeabi_lmul: - - push {r4, lr} - muls r1, r2 - muls r3, r0 - adds r1, r3 - - lsrs r3, r0, #16 - lsrs r4, r2, #16 - muls r3, r4 - adds r1, r3 - - lsrs r3, r0, #16 - uxth r0, r0 - uxth r2, r2 - muls r3, r2 - muls r4, r0 - muls r0, r2 - - movs r2, #0 - adds r3, r4 - adcs r2, r2 - lsls r2, #16 - adds r1, r2 - - lsls r2, r3, #16 - lsrs r3, #16 - adds r0, r2 - adcs r1, r3 - pop {r4, pc} +../../third_party/libaeabi-cortexm0/core/cortex-m0/lmul.S
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