[PATCH] Add arm_cortex_m7_tune.
Hale Wang
hale.wang@arm.com
Tue Oct 21 09:55:00 GMT 2014
Hi,
This patch is used to tune the gcc for Cortex-M7.
The performance of Dhrystone can be improved by 1%.
The performance of Coremark can be improved by 2.3%.
Patch also attached for convenience.
Is it ok for trunk?
Thanks and Best Regards,
Hale Wang
gcc/ChangeLog
2014-10-11 Hale Wang <Hale.Wang@arm.com>
* config/arm/arm.c: Add cortex-m7 tune.
* config/arm/arm-cores.def: Use cortex-m7 tune.
diff --git a/gcc/config/arm/arm-cores.def b/gcc/config/arm/arm-cores.def
index 56ec7fd..3b34173 100644
--- a/gcc/config/arm/arm-cores.def
+++ b/gcc/config/arm/arm-cores.def
@@ -149,7 +149,7 @@ ARM_CORE("cortex-r4",
cortexr4, cortexr4, 7R, FL_LDSCHED, cortex)
ARM_CORE("cortex-r4f", cortexr4f, cortexr4f,
7R, FL_LDSCHED, cortex)
ARM_CORE("cortex-r5", cortexr5, cortexr5,
7R, FL_LDSCHED | FL_ARM_DIV, cortex)
ARM_CORE("cortex-r7", cortexr7, cortexr7,
7R, FL_LDSCHED | FL_ARM_DIV, cortex)
-ARM_CORE("cortex-m7", cortexm7, cortexm7,
7EM, FL_LDSCHED, v7m)
+ARM_CORE("cortex-m7", cortexm7, cortexm7,
7EM, FL_LDSCHED, cortex_m7)
ARM_CORE("cortex-m4", cortexm4, cortexm4,
7EM, FL_LDSCHED, v7m)
ARM_CORE("cortex-m3", cortexm3, cortexm3,
7M, FL_LDSCHED, v7m)
ARM_CORE("marvell-pj4", marvell_pj4, marvell_pj4,
7A, FL_LDSCHED, 9e)
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 93b989d..834b13a 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -2003,6 +2003,27 @@ const struct tune_params arm_v7m_tune =
8
/* Maximum insns to inline memset. */
};
+/* Cortex-M7 tuning. */
+
+const struct tune_params arm_cortex_m7_tune =
+{
+ arm_9e_rtx_costs,
+ &v7m_extra_costs,
+ NULL,
/* Sched adj cost. */
+ 0,
/* Constant limit. */
+ 0,
/* Max cond insns. */
+ ARM_PREFETCH_NOT_BENEFICIAL,
+ true,
/* Prefer constant pool. */
+ arm_cortex_m_branch_cost,
+ false,
/* Prefer LDRD/STRD. */
+ {true, true},
/* Prefer non short circuit. */
+ &arm_default_vec_cost, /* Vectorizer costs. */
+ false, /* Prefer Neon for 64-bits
bitops. */
+ false, false, /* Prefer 32-bit encodings.
*/
+ false,
/* Prefer Neon for stringops. */
+ 8
/* Maximum insns to inline memset. */
+};
+
/* The arm_v6m_tune is duplicated from arm_cortex_tune, rather than
arm_v6t2_tune. It is used for cortex-m0, cortex-m1 and cortex-m0plus.
*/
const struct tune_params arm_v6m_tune =
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