tree 2c83e62fa897004cc5ca4ff7a27b7cd729e260cc
parent 5b349fc22e7ba35ecb76b365d8be71939d204cde
author Greta Yorsh <greta.yorsh@arm.com> 1354267898 +0000
committer David Butcher <david.butcher@arm.com> 1362134461 +0000

Adding strcmp tuned for Cortex-A15.

The attached patch provides a new implementation of strcmp for ARM,
using LDRD instead of LDR whenever possible.

For older architectures that do not support LDRD, this implementation
uses the same algorithm as before.

Testing and benchmarking:
* Validation: successfully passes a test that compares different strings
of length 1-128 and offsets 0-8 from a word boundary. Checked on
qemu/A15/A9, ARM/Thumb mode, Big/Little Endian.
* Integration with gcc: no regression on qemu for arm-none-eabi --with-cpu
a15/a9 --with-mode arm/thumb.

Change-Id: I9e230e1b99dbdc9119b69ee858a89038c516a4ea
Signed-off-by: Vassilis Laganakos <vasileios.laganakos@arm.com>