diff options
Diffstat (limited to 'arch/ppc64/lib/string.S')
-rw-r--r-- | arch/ppc64/lib/string.S | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/arch/ppc64/lib/string.S b/arch/ppc64/lib/string.S deleted file mode 100644 index e21a003..0000000 --- a/arch/ppc64/lib/string.S +++ /dev/null @@ -1,179 +0,0 @@ -/* - * String handling functions for PowerPC. - * - * Copyright (C) 1996 Paul Mackerras. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ -#include <asm/processor.h> -#include <asm/errno.h> -#include <asm/ppc_asm.h> - -_GLOBAL(strcpy) - addi r5,r3,-1 - addi r4,r4,-1 -1: lbzu r0,1(r4) - cmpwi 0,r0,0 - stbu r0,1(r5) - bne 1b - blr - -_GLOBAL(strncpy) - cmpwi 0,r5,0 - beqlr - mtctr r5 - addi r6,r3,-1 - addi r4,r4,-1 -1: lbzu r0,1(r4) - cmpwi 0,r0,0 - stbu r0,1(r6) - bdnzf 2,1b /* dec ctr, branch if ctr != 0 && !cr0.eq */ - blr - -_GLOBAL(strcat) - addi r5,r3,-1 - addi r4,r4,-1 -1: lbzu r0,1(r5) - cmpwi 0,r0,0 - bne 1b - addi r5,r5,-1 -1: lbzu r0,1(r4) - cmpwi 0,r0,0 - stbu r0,1(r5) - bne 1b - blr - -_GLOBAL(strcmp) - addi r5,r3,-1 - addi r4,r4,-1 -1: lbzu r3,1(r5) - cmpwi 1,r3,0 - lbzu r0,1(r4) - subf. r3,r0,r3 - beqlr 1 - beq 1b - blr - -_GLOBAL(strlen) - addi r4,r3,-1 -1: lbzu r0,1(r4) - cmpwi 0,r0,0 - bne 1b - subf r3,r3,r4 - blr - -_GLOBAL(memcmp) - cmpwi 0,r5,0 - ble- 2f - mtctr r5 - addi r6,r3,-1 - addi r4,r4,-1 -1: lbzu r3,1(r6) - lbzu r0,1(r4) - subf. r3,r0,r3 - bdnzt 2,1b - blr -2: li r3,0 - blr - -_GLOBAL(memchr) - cmpwi 0,r5,0 - ble- 2f - mtctr r5 - addi r3,r3,-1 -1: lbzu r0,1(r3) - cmpw 0,r0,r4 - bdnzf 2,1b - beqlr -2: li r3,0 - blr - -_GLOBAL(__clear_user) - addi r6,r3,-4 - li r3,0 - li r5,0 - cmplwi 0,r4,4 - blt 7f - /* clear a single word */ -11: stwu r5,4(r6) - beqlr - /* clear word sized chunks */ - andi. r0,r6,3 - add r4,r0,r4 - subf r6,r0,r6 - srwi r0,r4,2 - andi. r4,r4,3 - mtctr r0 - bdz 7f -1: stwu r5,4(r6) - bdnz 1b - /* clear byte sized chunks */ -7: cmpwi 0,r4,0 - beqlr - mtctr r4 - addi r6,r6,3 -8: stbu r5,1(r6) - bdnz 8b - blr -90: mr r3,r4 - blr -91: mfctr r3 - slwi r3,r3,2 - add r3,r3,r4 - blr -92: mfctr r3 - blr - - .section __ex_table,"a" - .align 3 - .llong 11b,90b - .llong 1b,91b - .llong 8b,92b - .text - -/* r3 = dst, r4 = src, r5 = count */ -_GLOBAL(__strncpy_from_user) - addi r6,r3,-1 - addi r4,r4,-1 - cmpwi 0,r5,0 - beq 2f - mtctr r5 -1: lbzu r0,1(r4) - cmpwi 0,r0,0 - stbu r0,1(r6) - bdnzf 2,1b /* dec ctr, branch if ctr != 0 && !cr0.eq */ - beq 3f -2: addi r6,r6,1 -3: subf r3,r3,r6 - blr -99: li r3,-EFAULT - blr - - .section __ex_table,"a" - .align 3 - .llong 1b,99b - .text - -/* r3 = str, r4 = len (> 0) */ -_GLOBAL(__strnlen_user) - addi r7,r3,-1 - mtctr r4 /* ctr = len */ -1: lbzu r0,1(r7) /* get next byte */ - cmpwi 0,r0,0 - bdnzf 2,1b /* loop if --ctr != 0 && byte != 0 */ - addi r7,r7,1 - subf r3,r3,r7 /* number of bytes we have looked at */ - beqlr /* return if we found a 0 byte */ - cmpw 0,r3,r4 /* did we look at all len bytes? */ - blt 99f /* if not, must have hit top */ - addi r3,r4,1 /* return len + 1 to indicate no null found */ - blr -99: li r3,0 /* bad address, return 0 */ - blr - - .section __ex_table,"a" - .align 3 - .llong 1b,99b |