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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/arm64/lib/tishift.S | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/lib/tishift.S')
| -rw-r--r-- | arch/arm64/lib/tishift.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm64/lib/tishift.S b/arch/arm64/lib/tishift.S new file mode 100644 index 000000000..0fdff9779 --- /dev/null +++ b/arch/arm64/lib/tishift.S @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) + * + * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#include <linux/linkage.h> + +ENTRY(__ashlti3) + cbz x2, 1f + mov x3, #64 + sub x3, x3, x2 + cmp x3, #0 + b.le 2f + lsl x1, x1, x2 + lsr x3, x0, x3 + lsl x2, x0, x2 + orr x1, x1, x3 + mov x0, x2 +1: + ret +2: + neg w1, w3 + mov x2, #0 + lsl x1, x0, x1 + mov x0, x2 + ret +ENDPROC(__ashlti3) + +ENTRY(__ashrti3) + cbz x2, 1f + mov x3, #64 + sub x3, x3, x2 + cmp x3, #0 + b.le 2f + lsr x0, x0, x2 + lsl x3, x1, x3 + asr x2, x1, x2 + orr x0, x0, x3 + mov x1, x2 +1: + ret +2: + neg w0, w3 + asr x2, x1, #63 + asr x0, x1, x0 + mov x1, x2 + ret +ENDPROC(__ashrti3) + +ENTRY(__lshrti3) + cbz x2, 1f + mov x3, #64 + sub x3, x3, x2 + cmp x3, #0 + b.le 2f + lsr x0, x0, x2 + lsl x3, x1, x3 + lsr x2, x1, x2 + orr x0, x0, x3 + mov x1, x2 +1: + ret +2: + neg w0, w3 + mov x2, #0 + lsr x0, x1, x0 + mov x1, x2 + ret +ENDPROC(__lshrti3) |