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| author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
| commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
| tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/sparc/lib/strlen_user_32.S | |
| parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
| download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip | |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
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 00000000..8c8a371d --- /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 |