[arm-embedded] Tune loop unrolling for cortex-m

[Joey Ye]

Committed in ARM/embedded-4_6-branch.

2011-09-21  Jiangning Liu  <jiangning....@arm.com>

        Tune loop unrolling for cortex-m
        * config/arm/arm-cores.def (cortex-m0): Change to new tune
        cortex_v6m.
        (cortex-m1): Likewise.
        * config/arm/arm-protos.h (max_unroll_times): New.
        * config/arm/arm.c (arm_default_unroll_times): New.
        (arm_cortex_m_unroll_times): New.
        (arm_cortex_v6m_tune): New.
        (arm_slowmul_tune): Add max_unroll_times function pointer.
        (arm_fastmul_tune, arm_xscale_tune, arm_9e_tune, 
        arm_v6t2_tune, arm_cortex_tune, arm_cortex_a9_tune,
        arm_cortex_v7m_tune, arm_cortex_v6m_tune,
        arm_fa726te_tune): Likewise.
        (arm_option_override): Enable loop unroll for all all M class
        Cores, if optimization level is >= 1.

loop-unrolling.patch
Description: Binary data