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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/lib/memcpy.S | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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/memcpy.S')
-rw-r--r-- | arch/arm/lib/memcpy.S | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/arch/arm/lib/memcpy.S b/arch/arm/lib/memcpy.S new file mode 100644 index 000000000000..f5a593ceb8cc --- /dev/null +++ b/arch/arm/lib/memcpy.S @@ -0,0 +1,393 @@ +/* + * linux/arch/arm/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!,{r0,r4-r9,fp,ip,lr,pc} ;\ + sub fp,ip,#4 + +#define EXIT \ + LOADREGS(ea, fp, {r0, r4 - r9, fp, sp, pc}) + +#define EXITEQ \ + LOADREGS(eqea, fp, {r0, r4 - r9, fp, sp, pc}) + +/* + * Prototype: void memcpy(void *to,const void *from,unsigned long n); + */ +ENTRY(memcpy) +ENTRY(memmove) + ENTER + cmp r1, r0 + bcc 23f + subs r2, r2, #4 + blt 6f + PLD( pld [r1, #0] ) + ands ip, r0, #3 + bne 7f + ands ip, r1, #3 + bne 8f + +1: subs r2, r2, #8 + blt 5f + subs r2, r2, #20 + blt 4f + PLD( pld [r1, #28] ) + PLD( subs r2, r2, #64 ) + PLD( blt 3f ) +2: PLD( pld [r1, #60] ) + PLD( pld [r1, #92] ) + ldmia r1!, {r3 - r9, ip} + subs r2, r2, #32 + stmgeia r0!, {r3 - r9, ip} + ldmgeia r1!, {r3 - r9, ip} + subges r2, r2, #32 + stmia r0!, {r3 - r9, ip} + bge 2b +3: PLD( ldmia r1!, {r3 - r9, ip} ) + PLD( adds r2, r2, #32 ) + PLD( stmgeia r0!, {r3 - r9, ip} ) + PLD( ldmgeia r1!, {r3 - r9, ip} ) + PLD( subges r2, r2, #32 ) + PLD( stmia r0!, {r3 - r9, ip} ) +4: cmn r2, #16 + ldmgeia r1!, {r3 - r6} + subge r2, r2, #16 + stmgeia r0!, {r3 - r6} + adds r2, r2, #20 + ldmgeia r1!, {r3 - r5} + subge r2, r2, #12 + stmgeia r0!, {r3 - r5} +5: adds r2, r2, #8 + blt 6f + subs r2, r2, #4 + ldrlt r3, [r1], #4 + ldmgeia r1!, {r4, r5} + subge r2, r2, #4 + strlt r3, [r0], #4 + stmgeia r0!, {r4, r5} + +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 18f + beq 13f + cmp r2, #12 + blt 11f + PLD( pld [r1, #12] ) + sub r2, r2, #12 + PLD( subs r2, r2, #32 ) + PLD( blt 10f ) + PLD( pld [r1, #28] ) +9: PLD( pld [r1, #44] ) +10: mov r3, r7, pull #8 + ldmia r1!, {r4 - r7} + subs r2, r2, #16 + 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} + bge 9b + PLD( cmn r2, #32 ) + PLD( bge 10b ) + PLD( add r2, r2, #32 ) + adds r2, r2, #12 + blt 12f +11: mov r3, r7, pull #8 + ldr r7, [r1], #4 + subs r2, r2, #4 + orr r3, r3, r7, push #24 + str r3, [r0], #4 + bge 11b +12: sub r1, r1, #3 + b 6b + +13: cmp r2, #12 + blt 16f + PLD( pld [r1, #12] ) + sub r2, r2, #12 + PLD( subs r2, r2, #32 ) + PLD( blt 15f ) + PLD( pld [r1, #28] ) +14: PLD( pld [r1, #44] ) +15: mov r3, r7, pull #16 + ldmia r1!, {r4 - r7} + subs r2, r2, #16 + 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} + bge 14b + PLD( cmn r2, #32 ) + PLD( bge 15b ) + PLD( add r2, r2, #32 ) + adds r2, r2, #12 + blt 17f +16: mov r3, r7, pull #16 + ldr r7, [r1], #4 + subs r2, r2, #4 + orr r3, r3, r7, push #16 + str r3, [r0], #4 + bge 16b +17: sub r1, r1, #2 + b 6b + +18: cmp r2, #12 + blt 21f + PLD( pld [r1, #12] ) + sub r2, r2, #12 + PLD( subs r2, r2, #32 ) + PLD( blt 20f ) + PLD( pld [r1, #28] ) +19: PLD( pld [r1, #44] ) +20: mov r3, r7, pull #24 + ldmia r1!, {r4 - r7} + subs r2, r2, #16 + 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} + bge 19b + PLD( cmn r2, #32 ) + PLD( bge 20b ) + PLD( add r2, r2, #32 ) + adds r2, r2, #12 + blt 22f +21: mov r3, r7, pull #24 + ldr r7, [r1], #4 + subs r2, r2, #4 + orr r3, r3, r7, push #8 + str r3, [r0], #4 + bge 21b +22: sub r1, r1, #1 + b 6b + + +23: add r1, r1, r2 + add r0, r0, r2 + subs r2, r2, #4 + blt 29f + PLD( pld [r1, #-4] ) + ands ip, r0, #3 + bne 30f + ands ip, r1, #3 + bne 31f + +24: subs r2, r2, #8 + blt 28f + subs r2, r2, #20 + blt 27f + PLD( pld [r1, #-32] ) + PLD( subs r2, r2, #64 ) + PLD( blt 26f ) +25: PLD( pld [r1, #-64] ) + PLD( pld [r1, #-96] ) + ldmdb r1!, {r3 - r9, ip} + subs r2, r2, #32 + stmgedb r0!, {r3 - r9, ip} + ldmgedb r1!, {r3 - r9, ip} + subges r2, r2, #32 + stmdb r0!, {r3 - r9, ip} + bge 25b +26: PLD( ldmdb r1!, {r3 - r9, ip} ) + PLD( adds r2, r2, #32 ) + PLD( stmgedb r0!, {r3 - r9, ip} ) + PLD( ldmgedb r1!, {r3 - r9, ip} ) + PLD( subges r2, r2, #32 ) + PLD( stmdb r0!, {r3 - r9, ip} ) +27: cmn r2, #16 + ldmgedb r1!, {r3 - r6} + subge r2, r2, #16 + stmgedb r0!, {r3 - r6} + adds r2, r2, #20 + ldmgedb r1!, {r3 - r5} + subge r2, r2, #12 + stmgedb r0!, {r3 - r5} +28: adds r2, r2, #8 + blt 29f + subs r2, r2, #4 + ldrlt r3, [r1, #-4]! + ldmgedb r1!, {r4, r5} + subge r2, r2, #4 + strlt r3, [r0, #-4]! + stmgedb r0!, {r4, r5} + +29: 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 + +30: 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 29b + ands ip, r1, #3 + beq 24b + +31: bic r1, r1, #3 + ldr r3, [r1], #0 + cmp ip, #2 + blt 41f + beq 36f + cmp r2, #12 + blt 34f + PLD( pld [r1, #-16] ) + sub r2, r2, #12 + PLD( subs r2, r2, #32 ) + PLD( blt 33f ) + PLD( pld [r1, #-32] ) +32: PLD( pld [r1, #-48] ) +33: mov r7, r3, push #8 + ldmdb r1!, {r3, r4, r5, r6} + subs r2, r2, #16 + 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} + bge 32b + PLD( cmn r2, #32 ) + PLD( bge 33b ) + PLD( add r2, r2, #32 ) + adds r2, r2, #12 + blt 35f +34: mov ip, r3, push #8 + ldr r3, [r1, #-4]! + subs r2, r2, #4 + orr ip, ip, r3, pull #24 + str ip, [r0, #-4]! + bge 34b +35: add r1, r1, #3 + b 29b + +36: cmp r2, #12 + blt 39f + PLD( pld [r1, #-16] ) + sub r2, r2, #12 + PLD( subs r2, r2, #32 ) + PLD( blt 38f ) + PLD( pld [r1, #-32] ) +37: PLD( pld [r1, #-48] ) +38: mov r7, r3, push #16 + ldmdb r1!, {r3, r4, r5, r6} + subs r2, r2, #16 + 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} + bge 37b + PLD( cmn r2, #32 ) + PLD( bge 38b ) + PLD( add r2, r2, #32 ) + adds r2, r2, #12 + blt 40f +39: mov ip, r3, push #16 + ldr r3, [r1, #-4]! + subs r2, r2, #4 + orr ip, ip, r3, pull #16 + str ip, [r0, #-4]! + bge 39b +40: add r1, r1, #2 + b 29b + +41: cmp r2, #12 + blt 44f + PLD( pld [r1, #-16] ) + sub r2, r2, #12 + PLD( subs r2, r2, #32 ) + PLD( blt 43f ) + PLD( pld [r1, #-32] ) +42: PLD( pld [r1, #-48] ) +43: mov r7, r3, push #24 + ldmdb r1!, {r3, r4, r5, r6} + subs r2, r2, #16 + 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} + bge 42b + PLD( cmn r2, #32 ) + PLD( bge 43b ) + PLD( add r2, r2, #32 ) + adds r2, r2, #12 + blt 45f +44: mov ip, r3, push #24 + ldr r3, [r1, #-4]! + subs r2, r2, #4 + orr ip, ip, r3, pull #8 + str ip, [r0, #-4]! + bge 44b +45: add r1, r1, #1 + b 29b + |