MIPS: microMIPS: Optimise 'strnlen' core library function.

Optimise 'strnlen' 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>

diff --git a/arch/mips/lib/strnlen_user.S b/arch/mips/lib/strnlen_user.S
index beea03c..fcacea5 100644 (file)
--- a/arch/mips/lib/strnlen_user.S
+++ b/arch/mips/lib/strnlen_user.S
@@ -35,7 +35,7 @@ FEXPORT(__strnlen_user_nocheck_asm)
        PTR_ADDU        a1, a0                  # stop pointer
 1:     beq             v0, a1, 1f              # limit reached?
        EX(lb, t0, (v0), .Lfault)
-       PTR_ADDU        v0, 1
+       PTR_ADDIU       v0, 1
        bnez            t0, 1b
 1:     PTR_SUBU        v0, a0
        jr              ra