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| author | Steven J. Hill <Steven.Hill@imgtec.com> | 2013-03-25 13:41:47 -0500 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-05-09 17:55:19 +0200 |
| commit | b1bac3734581ab6788bbfe125c62914f8d6d5e01 (patch) | |
| tree | cf1592a5bc6185e5af63d9729d6afb2ef30bd50a | |
| parent | 0131f2b2c93bc8f0b0d9d599cf72d1df76ad3f01 (diff) | |
| download | linux-b1bac3734581ab6788bbfe125c62914f8d6d5e01.tar.bz2 | |
MIPS: microMIPS: Optimise 'strlen' core library function.
Optimise 'strlen' to use microMIPS instructions and/or optimisations
for binary size reduction. When the microMIPS ISA is not being used,
the library function compiles to the original binary code.
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| -rw-r--r-- | arch/mips/lib/strlen_user.S | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/mips/lib/strlen_user.S b/arch/mips/lib/strlen_user.S index fdbb970f670d..e362dcdc69d1 100644 --- a/arch/mips/lib/strlen_user.S +++ b/arch/mips/lib/strlen_user.S @@ -3,8 +3,9 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (c) 1996, 1998, 1999, 2004 by Ralf Baechle - * Copyright (c) 1999 Silicon Graphics, Inc. + * Copyright (C) 1996, 1998, 1999, 2004 by Ralf Baechle + * Copyright (C) 1999 Silicon Graphics, Inc. + * Copyright (C) 2011 MIPS Technologies, Inc. */ #include <asm/asm.h> #include <asm/asm-offsets.h> @@ -28,9 +29,9 @@ LEAF(__strlen_user_asm) FEXPORT(__strlen_user_nocheck_asm) move v0, a0 -1: EX(lb, t0, (v0), .Lfault) +1: EX(lbu, v1, (v0), .Lfault) PTR_ADDIU v0, 1 - bnez t0, 1b + bnez v1, 1b PTR_SUBU v0, a0 jr ra END(__strlen_user_asm) |