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| author | merge <null@invalid> | 2009-01-22 13:55:32 +0000 |
|---|---|---|
| committer | Andy Green <agreen@octopus.localdomain> | 2009-01-22 13:55:32 +0000 |
| commit | aa6f5ffbdba45aa8e19e5048648fc6c7b25376d3 (patch) | |
| tree | fbb786d0ac6f8a774fd834e9ce951197e60fbffa /arch/sparc/lib/strlen_user_32.S | |
| parent | f2d78193eae5dccd3d588d2c8ea0866efc368332 (diff) | |
MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141
pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141 / fdf777a63bcb59e0dfd78bfe2c6242e01f6d4eb9 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040
stable-tracking-hist top was MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 / 90463bfd2d5a3c8b52f6e6d71024a00e052b0ced ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-mokopatches-tracking-hist-fix-stray-endmenu-patch
mokopatches-tracking-hist top was fix-stray-endmenu-patch / 3630e0be570de8057e7f8d2fe501ed353cdf34e6 ... parent commitmessage:
From: Andy Green <andy@openmoko.com>
fix-stray-endmenu.patch
Signed-off-by: Andy Green <andy@openmoko.com>
Diffstat (limited to 'arch/sparc/lib/strlen_user_32.S')
| -rw-r--r-- | arch/sparc/lib/strlen_user_32.S | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/sparc/lib/strlen_user_32.S b/arch/sparc/lib/strlen_user_32.S new file mode 100644 index 00000000000..8c8a371df3c --- /dev/null +++ b/arch/sparc/lib/strlen_user_32.S @@ -0,0 +1,109 @@ +/* strlen_user.S: Sparc optimized strlen_user code + * + * Return length of string in userspace including terminating 0 + * or 0 for error + * + * Copyright (C) 1991,1996 Free Software Foundation + * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + */ + +#define LO_MAGIC 0x01010101 +#define HI_MAGIC 0x80808080 + +10: + ldub [%o0], %o5 + cmp %o5, 0 + be 1f + add %o0, 1, %o0 + andcc %o0, 3, %g0 + be 4f + or %o4, %lo(HI_MAGIC), %o3 +11: + ldub [%o0], %o5 + cmp %o5, 0 + be 2f + add %o0, 1, %o0 + andcc %o0, 3, %g0 + be 5f + sethi %hi(LO_MAGIC), %o4 +12: + ldub [%o0], %o5 + cmp %o5, 0 + be 3f + add %o0, 1, %o0 + b 13f + or %o4, %lo(LO_MAGIC), %o2 +1: + retl + mov 1, %o0 +2: + retl + mov 2, %o0 +3: + retl + mov 3, %o0 + + .align 4 + .global __strlen_user, __strnlen_user +__strlen_user: + sethi %hi(32768), %o1 +__strnlen_user: + mov %o1, %g1 + mov %o0, %o1 + andcc %o0, 3, %g0 + bne 10b + sethi %hi(HI_MAGIC), %o4 + or %o4, %lo(HI_MAGIC), %o3 +4: + sethi %hi(LO_MAGIC), %o4 +5: + or %o4, %lo(LO_MAGIC), %o2 +13: + ld [%o0], %o5 +2: + sub %o5, %o2, %o4 + andcc %o4, %o3, %g0 + bne 82f + add %o0, 4, %o0 + sub %o0, %o1, %g2 +81: cmp %g2, %g1 + blu 13b + mov %o0, %o4 + ba,a 1f + + /* Check every byte. */ +82: srl %o5, 24, %g5 + andcc %g5, 0xff, %g0 + be 1f + add %o0, -3, %o4 + srl %o5, 16, %g5 + andcc %g5, 0xff, %g0 + be 1f + add %o4, 1, %o4 + srl %o5, 8, %g5 + andcc %g5, 0xff, %g0 + be 1f + add %o4, 1, %o4 + andcc %o5, 0xff, %g0 + bne 81b + sub %o0, %o1, %g2 + + add %o4, 1, %o4 +1: + retl + sub %o4, %o1, %o0 + + .section .fixup,#alloc,#execinstr + .align 4 +9: + retl + clr %o0 + + .section __ex_table,#alloc + .align 4 + + .word 10b, 9b + .word 11b, 9b + .word 12b, 9b + .word 13b, 9b |