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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
| commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
| tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/lib/memcmp_32.S | |
| parent | Initial commit. (diff) | |
| download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip | |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/lib/memcmp_32.S')
| -rw-r--r-- | arch/powerpc/lib/memcmp_32.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/powerpc/lib/memcmp_32.S b/arch/powerpc/lib/memcmp_32.S new file mode 100644 index 0000000000..f6fca5664e --- /dev/null +++ b/arch/powerpc/lib/memcmp_32.S @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * memcmp for PowerPC32 + * + * Copyright (C) 1996 Paul Mackerras. + * + */ + +#include <linux/export.h> +#include <asm/ppc_asm.h> + + .text + +_GLOBAL(memcmp) + srawi. r7, r5, 2 /* Divide len by 4 */ + mr r6, r3 + beq- 3f + mtctr r7 + li r7, 0 +1: lwzx r3, r6, r7 + lwzx r0, r4, r7 + addi r7, r7, 4 + cmplw cr0, r3, r0 + bdnzt eq, 1b + bne 5f +3: andi. r3, r5, 3 + beqlr + cmplwi cr1, r3, 2 + blt- cr1, 4f + lhzx r3, r6, r7 + lhzx r0, r4, r7 + addi r7, r7, 2 + subf. r3, r0, r3 + beqlr cr1 + bnelr +4: lbzx r3, r6, r7 + lbzx r0, r4, r7 + subf. r3, r0, r3 + blr +5: li r3, 1 + bgtlr + li r3, -1 + blr +EXPORT_SYMBOL(memcmp) |