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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/lib/io-readsl.S
downloadconfigs-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/lib/io-readsl.S')
-rw-r--r--arch/arm/lib/io-readsl.S78
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/lib/io-readsl.S b/arch/arm/lib/io-readsl.S
new file mode 100644
index 00000000000..75a9121cb23
--- /dev/null
+++ b/arch/arm/lib/io-readsl.S
@@ -0,0 +1,78 @@
+/*
+ * linux/arch/arm/lib/io-readsl.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ENTRY(__raw_readsl)
+ teq r2, #0 @ do we have to check for the zero len?
+ moveq pc, lr
+ ands ip, r1, #3
+ bne 3f
+
+ subs r2, r2, #4
+ bmi 2f
+ stmfd sp!, {r4, lr}
+1: ldr r3, [r0, #0]
+ ldr r4, [r0, #0]
+ ldr ip, [r0, #0]
+ ldr lr, [r0, #0]
+ subs r2, r2, #4
+ stmia r1!, {r3, r4, ip, lr}
+ bpl 1b
+ ldmfd sp!, {r4, lr}
+2: movs r2, r2, lsl #31
+ ldrcs r3, [r0, #0]
+ ldrcs ip, [r0, #0]
+ stmcsia r1!, {r3, ip}
+ ldrne r3, [r0, #0]
+ strne r3, [r1, #0]
+ mov pc, lr
+
+3: ldr r3, [r0]
+ cmp ip, #2
+ mov ip, r3, get_byte_0
+ strb ip, [r1], #1
+ bgt 6f
+ mov ip, r3, get_byte_1
+ strb ip, [r1], #1
+ beq 5f
+ mov ip, r3, get_byte_2
+ strb ip, [r1], #1
+
+4: subs r2, r2, #1
+ mov ip, r3, pull #24
+ ldrne r3, [r0]
+ orrne ip, ip, r3, push #8
+ strne ip, [r1], #4
+ bne 4b
+ b 8f
+
+5: subs r2, r2, #1
+ mov ip, r3, pull #16
+ ldrne r3, [r0]
+ orrne ip, ip, r3, push #16
+ strne ip, [r1], #4
+ bne 5b
+ b 7f
+
+6: subs r2, r2, #1
+ mov ip, r3, pull #8
+ ldrne r3, [r0]
+ orrne ip, ip, r3, push #24
+ strne ip, [r1], #4
+ bne 6b
+
+ mov r3, ip, get_byte_2
+ strb r3, [r1, #2]
+7: mov r3, ip, get_byte_1
+ strb r3, [r1, #1]
+8: mov r3, ip, get_byte_0
+ strb r3, [r1, #0]
+ mov pc, lr