summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/lib/memcmp_32.S
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/lib/memcmp_32.S
parentInitial commit. (diff)
downloadlinux-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.S45
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)