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-rw-r--r--arch/arm26/lib/memcpy.S318
1 files changed, 318 insertions, 0 deletions
diff --git a/arch/arm26/lib/memcpy.S b/arch/arm26/lib/memcpy.S
new file mode 100644
index 00000000000..3f719e41206
--- /dev/null
+++ b/arch/arm26/lib/memcpy.S
@@ -0,0 +1,318 @@
+/*
+ * linux/arch/arm26/lib/memcpy.S
+ *
+ * Copyright (C) 1995-1999 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.
+ *
+ * ASM optimised string functions
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ .text
+
+#define ENTER \
+ mov ip,sp ;\
+ stmfd sp!,{r4-r9,fp,ip,lr,pc} ;\
+ sub fp,ip,#4
+
+#define EXIT \
+ LOADREGS(ea, fp, {r4 - r9, fp, sp, pc})
+
+#define EXITEQ \
+ LOADREGS(eqea, fp, {r4 - r9, fp, sp, pc})
+
+/*
+ * Prototype: void memcpy(void *to,const void *from,unsigned long n);
+ * ARM3: cant use memcopy here!!!
+ */
+ENTRY(memcpy)
+ENTRY(memmove)
+ ENTER
+ cmp r1, r0
+ bcc 19f
+ subs r2, r2, #4
+ blt 6f
+ ands ip, r0, #3
+ bne 7f
+ ands ip, r1, #3
+ bne 8f
+
+1: subs r2, r2, #8
+ blt 5f
+ subs r2, r2, #0x14
+ blt 3f
+2: ldmia r1!,{r3 - r9, ip}
+ stmia r0!,{r3 - r9, ip}
+ subs r2, r2, #32
+ bge 2b
+ cmn r2, #16
+ ldmgeia r1!, {r3 - r6}
+ stmgeia r0!, {r3 - r6}
+ subge r2, r2, #0x10
+3: adds r2, r2, #0x14
+4: ldmgeia r1!, {r3 - r5}
+ stmgeia r0!, {r3 - r5}
+ subges r2, r2, #12
+ bge 4b
+5: adds r2, r2, #8
+ blt 6f
+ subs r2, r2, #4
+ ldrlt r3, [r1], #4
+ ldmgeia r1!, {r4, r5}
+ strlt r3, [r0], #4
+ stmgeia r0!, {r4, r5}
+ subge r2, r2, #4
+
+6: adds r2, r2, #4
+ EXITEQ
+ cmp r2, #2
+ ldrb r3, [r1], #1
+ ldrgeb r4, [r1], #1
+ ldrgtb r5, [r1], #1
+ strb r3, [r0], #1
+ strgeb r4, [r0], #1
+ strgtb r5, [r0], #1
+ EXIT
+
+7: rsb ip, ip, #4
+ cmp ip, #2
+ ldrb r3, [r1], #1
+ ldrgeb r4, [r1], #1
+ ldrgtb r5, [r1], #1
+ strb r3, [r0], #1
+ strgeb r4, [r0], #1
+ strgtb r5, [r0], #1
+ subs r2, r2, ip
+ blt 6b
+ ands ip, r1, #3
+ beq 1b
+
+8: bic r1, r1, #3
+ ldr r7, [r1], #4
+ cmp ip, #2
+ bgt 15f
+ beq 11f
+ cmp r2, #12
+ blt 10f
+ sub r2, r2, #12
+9: mov r3, r7, pull #8
+ ldmia r1!, {r4 - r7}
+ orr r3, r3, r4, push #24
+ mov r4, r4, pull #8
+ orr r4, r4, r5, push #24
+ mov r5, r5, pull #8
+ orr r5, r5, r6, push #24
+ mov r6, r6, pull #8
+ orr r6, r6, r7, push #24
+ stmia r0!, {r3 - r6}
+ subs r2, r2, #16
+ bge 9b
+ adds r2, r2, #12
+ blt 100f
+10: mov r3, r7, pull #8
+ ldr r7, [r1], #4
+ subs r2, r2, #4
+ orr r3, r3, r7, push #24
+ str r3, [r0], #4
+ bge 10b
+100: sub r1, r1, #3
+ b 6b
+
+11: cmp r2, #12
+ blt 13f /* */
+ sub r2, r2, #12
+12: mov r3, r7, pull #16
+ ldmia r1!, {r4 - r7}
+ orr r3, r3, r4, push #16
+ mov r4, r4, pull #16
+ orr r4, r4, r5, push #16
+ mov r5, r5, pull #16
+ orr r5, r5, r6, push #16
+ mov r6, r6, pull #16
+ orr r6, r6, r7, push #16
+ stmia r0!, {r3 - r6}
+ subs r2, r2, #16
+ bge 12b
+ adds r2, r2, #12
+ blt 14f
+13: mov r3, r7, pull #16
+ ldr r7, [r1], #4
+ subs r2, r2, #4
+ orr r3, r3, r7, push #16
+ str r3, [r0], #4
+ bge 13b
+14: sub r1, r1, #2
+ b 6b
+
+15: cmp r2, #12
+ blt 17f
+ sub r2, r2, #12
+16: mov r3, r7, pull #24
+ ldmia r1!, {r4 - r7}
+ orr r3, r3, r4, push #8
+ mov r4, r4, pull #24
+ orr r4, r4, r5, push #8
+ mov r5, r5, pull #24
+ orr r5, r5, r6, push #8
+ mov r6, r6, pull #24
+ orr r6, r6, r7, push #8
+ stmia r0!, {r3 - r6}
+ subs r2, r2, #16
+ bge 16b
+ adds r2, r2, #12
+ blt 18f
+17: mov r3, r7, pull #24
+ ldr r7, [r1], #4
+ subs r2, r2, #4
+ orr r3, r3, r7, push #8
+ str r3, [r0], #4
+ bge 17b
+18: sub r1, r1, #1
+ b 6b
+
+
+19: add r1, r1, r2
+ add r0, r0, r2
+ subs r2, r2, #4
+ blt 24f
+ ands ip, r0, #3
+ bne 25f
+ ands ip, r1, #3
+ bne 26f
+
+20: subs r2, r2, #8
+ blt 23f
+ subs r2, r2, #0x14
+ blt 22f
+21: ldmdb r1!, {r3 - r9, ip}
+ stmdb r0!, {r3 - r9, ip}
+ subs r2, r2, #32
+ bge 21b
+22: cmn r2, #16
+ ldmgedb r1!, {r3 - r6}
+ stmgedb r0!, {r3 - r6}
+ subge r2, r2, #16
+ adds r2, r2, #20
+ ldmgedb r1!, {r3 - r5}
+ stmgedb r0!, {r3 - r5}
+ subge r2, r2, #12
+23: adds r2, r2, #8
+ blt 24f
+ subs r2, r2, #4
+ ldrlt r3, [r1, #-4]!
+ ldmgedb r1!, {r4, r5}
+ strlt r3, [r0, #-4]!
+ stmgedb r0!, {r4, r5}
+ subge r2, r2, #4
+
+24: adds r2, r2, #4
+ EXITEQ
+ cmp r2, #2
+ ldrb r3, [r1, #-1]!
+ ldrgeb r4, [r1, #-1]!
+ ldrgtb r5, [r1, #-1]!
+ strb r3, [r0, #-1]!
+ strgeb r4, [r0, #-1]!
+ strgtb r5, [r0, #-1]!
+ EXIT
+
+25: cmp ip, #2
+ ldrb r3, [r1, #-1]!
+ ldrgeb r4, [r1, #-1]!
+ ldrgtb r5, [r1, #-1]!
+ strb r3, [r0, #-1]!
+ strgeb r4, [r0, #-1]!
+ strgtb r5, [r0, #-1]!
+ subs r2, r2, ip
+ blt 24b
+ ands ip, r1, #3
+ beq 20b
+
+26: bic r1, r1, #3
+ ldr r3, [r1], #0
+ cmp ip, #2
+ blt 34f
+ beq 30f
+ cmp r2, #12
+ blt 28f
+ sub r2, r2, #12
+27: mov r7, r3, push #8
+ ldmdb r1!, {r3, r4, r5, r6}
+ orr r7, r7, r6, pull #24
+ mov r6, r6, push #8
+ orr r6, r6, r5, pull #24
+ mov r5, r5, push #8
+ orr r5, r5, r4, pull #24
+ mov r4, r4, push #8
+ orr r4, r4, r3, pull #24
+ stmdb r0!, {r4, r5, r6, r7}
+ subs r2, r2, #16
+ bge 27b
+ adds r2, r2, #12
+ blt 29f
+28: mov ip, r3, push #8
+ ldr r3, [r1, #-4]!
+ subs r2, r2, #4
+ orr ip, ip, r3, pull #24
+ str ip, [r0, #-4]!
+ bge 28b
+29: add r1, r1, #3
+ b 24b
+
+30: cmp r2, #12
+ blt 32f
+ sub r2, r2, #12
+31: mov r7, r3, push #16
+ ldmdb r1!, {r3, r4, r5, r6}
+ orr r7, r7, r6, pull #16
+ mov r6, r6, push #16
+ orr r6, r6, r5, pull #16
+ mov r5, r5, push #16
+ orr r5, r5, r4, pull #16
+ mov r4, r4, push #16
+ orr r4, r4, r3, pull #16
+ stmdb r0!, {r4, r5, r6, r7}
+ subs r2, r2, #16
+ bge 31b
+ adds r2, r2, #12
+ blt 33f
+32: mov ip, r3, push #16
+ ldr r3, [r1, #-4]!
+ subs r2, r2, #4
+ orr ip, ip, r3, pull #16
+ str ip, [r0, #-4]!
+ bge 32b
+33: add r1, r1, #2
+ b 24b
+
+34: cmp r2, #12
+ blt 36f
+ sub r2, r2, #12
+35: mov r7, r3, push #24
+ ldmdb r1!, {r3, r4, r5, r6}
+ orr r7, r7, r6, pull #8
+ mov r6, r6, push #24
+ orr r6, r6, r5, pull #8
+ mov r5, r5, push #24
+ orr r5, r5, r4, pull #8
+ mov r4, r4, push #24
+ orr r4, r4, r3, pull #8
+ stmdb r0!, {r4, r5, r6, r7}
+ subs r2, r2, #16
+ bge 35b
+ adds r2, r2, #12
+ blt 37f
+36: mov ip, r3, push #24
+ ldr r3, [r1, #-4]!
+ subs r2, r2, #4
+ orr ip, ip, r3, pull #8
+ str ip, [r0, #-4]!
+ bge 36b
+37: add r1, r1, #1
+ b 24b
+
+ .align
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