Patchwork [RFA/ARM,01/05] : Create tune for Cortex-A15.

login
register
mail settings
Submitter Sameera Deshpande
Date Oct. 11, 2011, 9:15 a.m.
Message ID <1318324522.2186.45.camel@e102549-lin.cambridge.arm.com>
Download mbox | patch
Permalink /patch/118884/
State New
Headers show

Comments

Sameera Deshpande - Oct. 11, 2011, 9:15 a.m.
Hi!

This patch adds new field in tune_params to indicate if LDRD/STRD are
preferred over PUSH/POP in prologue/epilogue of specific core.
It also creates new tune for cortex-A15 and updates tunes for other
cores to set new field to default value. 

Changelog entry for Patch to create tune for cortex-a15:

2011-10-11  Sameera Deshpande
<sameera.deshpande@arm.com>                                             
        
        * config/arm/arm-cores.def (cortex_a15): Update.
        * config/arm/arm-protos.h (struct tune_params): Add new field...
          (arm_gen_ldrd_strd): ... this.
        * config/arm/arm.c (arm_slowmul_tune): Add 
          arm_gen_ldrd_strd field settings.
          (arm_fastmul_tune): Likewise.
          (arm_strongarm_tune): Likewise.
          (arm_xscale_tune): Likewise.
          (arm_9e_tune): Likewise.
          (arm_v6t2_tune): Likewise.
          (arm_cortex_tune): Likewise.
          (arm_cortex_a5_tune): Likewise.
          (arm_cortex_a9_tune): Likewise.
          (arm_fa726te_tune): Likewise. 
          (arm_cortex_a15_tune): New variable.
Ramana Radhakrishnan - Oct. 21, 2011, 12:43 p.m.
> 2011-10-11  Sameera Deshpande
> <sameera.deshpande@arm.com>
>
>        * config/arm/arm-cores.def (cortex_a15): Update.
>        * config/arm/arm-protos.h (struct tune_params): Add new field...
>          (arm_gen_ldrd_strd): ... this.
>        * config/arm/arm.c (arm_slowmul_tune): Add
>          arm_gen_ldrd_strd field settings.
>          (arm_fastmul_tune): Likewise.
>          (arm_strongarm_tune): Likewise.
>          (arm_xscale_tune): Likewise.
>          (arm_9e_tune): Likewise.
>          (arm_v6t2_tune): Likewise.
>          (arm_cortex_tune): Likewise.
>          (arm_cortex_a5_tune): Likewise.
>          (arm_cortex_a9_tune): Likewise.
>          (arm_fa726te_tune): Likewise.
>          (arm_cortex_a15_tune): New variable.
> --

OK.

Ramana

>
>

Patch

diff --git a/gcc/config/arm/arm-cores.def b/gcc/config/arm/arm-cores.def
index 742b5e8..1b42713 100644
--- a/gcc/config/arm/arm-cores.def
+++ b/gcc/config/arm/arm-cores.def
@@ -128,7 +128,7 @@  ARM_CORE("generic-armv7-a", genericv7a,	7A,				 FL_LDSCHED, cortex)
 ARM_CORE("cortex-a5",	  cortexa5,	7A,				 FL_LDSCHED, cortex_a5)
 ARM_CORE("cortex-a8",	  cortexa8,	7A,				 FL_LDSCHED, cortex)
 ARM_CORE("cortex-a9",	  cortexa9,	7A,				 FL_LDSCHED, cortex_a9)
-ARM_CORE("cortex-a15",	  cortexa15,	7A,				 FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV, cortex)
+ARM_CORE("cortex-a15",	  cortexa15,	7A,				 FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV, cortex_a15)
 ARM_CORE("cortex-r4",	  cortexr4,	7R,				 FL_LDSCHED, cortex)
 ARM_CORE("cortex-r4f",	  cortexr4f,	7R,				 FL_LDSCHED, cortex)
 ARM_CORE("cortex-r5",	  cortexr5,	7R,				 FL_LDSCHED | FL_ARM_DIV, cortex)
diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index f69bc42..c6b8f71 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -243,6 +243,9 @@  struct tune_params
   int l1_cache_line_size;
   bool prefer_constant_pool;
   int (*branch_cost) (bool, bool);
+  /* This flag indicates if STRD/LDRD instructions are preferred
+     over PUSH/POP in epilogue/prologue.  */
+  bool prefer_ldrd_strd;
 };
 
 extern const struct tune_params *current_tune;
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 6c09267..d709375 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -850,7 +850,8 @@  const struct tune_params arm_slowmul_tune =
   5,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   true,						/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 const struct tune_params arm_fastmul_tune =
@@ -861,7 +862,8 @@  const struct tune_params arm_fastmul_tune =
   5,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   true,						/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 /* StrongARM has early execution of branches, so a sequence that is worth
@@ -875,7 +877,8 @@  const struct tune_params arm_strongarm_tune =
   3,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   true,						/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 const struct tune_params arm_xscale_tune =
@@ -886,7 +889,8 @@  const struct tune_params arm_xscale_tune =
   3,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   true,						/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 const struct tune_params arm_9e_tune =
@@ -897,7 +901,8 @@  const struct tune_params arm_9e_tune =
   5,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   true,						/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 const struct tune_params arm_v6t2_tune =
@@ -908,7 +913,8 @@  const struct tune_params arm_v6t2_tune =
   5,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   false,					/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 /* Generic Cortex tuning.  Use more specific tunings if appropriate.  */
@@ -920,7 +926,20 @@  const struct tune_params arm_cortex_tune =
   5,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   false,					/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
+};
+
+const struct tune_params arm_cortex_a15_tune =
+{
+  arm_9e_rtx_costs,
+  NULL,
+  1,                                            /* Constant limit.  */
+  5,                                            /* Max cond insns.  */
+  ARM_PREFETCH_NOT_BENEFICIAL,
+  false,                                        /* Prefer constant pool.  */
+  arm_default_branch_cost,
+  true                                          /* Prefer LDRD/STRD.  */
 };
 
 /* Branches can be dual-issued on Cortex-A5, so conditional execution is
@@ -934,7 +953,8 @@  const struct tune_params arm_cortex_a5_tune =
   1,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   false,					/* Prefer constant pool.  */
-  arm_cortex_a5_branch_cost
+  arm_cortex_a5_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 const struct tune_params arm_cortex_a9_tune =
@@ -945,7 +965,8 @@  const struct tune_params arm_cortex_a9_tune =
   5,						/* Max cond insns.  */
   ARM_PREFETCH_BENEFICIAL(4,32,32),
   false,					/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };
 
 const struct tune_params arm_fa726te_tune =
@@ -956,7 +977,8 @@  const struct tune_params arm_fa726te_tune =
   5,						/* Max cond insns.  */
   ARM_PREFETCH_NOT_BENEFICIAL,
   true,						/* Prefer constant pool.  */
-  arm_default_branch_cost
+  arm_default_branch_cost,
+  false                                         /* Prefer LDRD/STRD.  */
 };