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openwrtv4/toolchain/gcc/patches/linaro/995-fa526.patch
Imre Kaloz aa6099c624 backport fa526 optimization for gcc 4.5+ 
SVN-Revision: 25709
2011-02-25 17:44:18 +00:00

257 lines
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--- a/gcc/config/arm/arm-cores.def
+++ b/gcc/config/arm/arm-cores.def
@@ -74,6 +74,7 @@ ARM_CORE("strongarm", strongarm, 4,
ARM_CORE("strongarm110", strongarm110, 4, FL_MODE26 | FL_LDSCHED | FL_STRONG, fastmul)
ARM_CORE("strongarm1100", strongarm1100, 4, FL_MODE26 | FL_LDSCHED | FL_STRONG, fastmul)
ARM_CORE("strongarm1110", strongarm1110, 4, FL_MODE26 | FL_LDSCHED | FL_STRONG, fastmul)
+ARM_CORE("fa526", fa526, 4, FL_LDSCHED, fastmul)
/* V4T Architecture Processors */
ARM_CORE("arm7tdmi", arm7tdmi, 4T, FL_CO_PROC , fastmul)
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -435,7 +435,7 @@
(define_attr "generic_sched" "yes,no"
(const (if_then_else
- (ior (eq_attr "tune" "arm926ejs,arm1020e,arm1026ejs,arm1136js,arm1136jfs,cortexa5,cortexa8,cortexa9,cortexm4")
+ (ior (eq_attr "tune" "fa526,arm926ejs,arm1020e,arm1026ejs,arm1136js,arm1136jfs,cortexa5,cortexa8,cortexa9,cortexm4")
(eq_attr "tune_cortexr4" "yes"))
(const_string "no")
(const_string "yes"))))
@@ -467,6 +467,7 @@
(include "arm1020e.md")
(include "arm1026ejs.md")
(include "arm1136jfs.md")
+(include "fa526.md")
(include "cortex-a5.md")
(include "cortex-a8.md")
(include "cortex-a9.md")
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -1,5 +1,5 @@
;; -*- buffer-read-only: t -*-
;; Generated automatically by gentune.sh from arm-cores.def
(define_attr "tune"
- "arm2,arm250,arm3,arm6,arm60,arm600,arm610,arm620,arm7,arm7d,arm7di,arm70,arm700,arm700i,arm710,arm720,arm710c,arm7100,arm7500,arm7500fe,arm7m,arm7dm,arm7dmi,arm8,arm810,strongarm,strongarm110,strongarm1100,strongarm1110,arm7tdmi,arm7tdmis,arm710t,arm720t,arm740t,arm9,arm9tdmi,arm920,arm920t,arm922t,arm940t,ep9312,arm10tdmi,arm1020t,arm9e,arm946es,arm966es,arm968es,arm10e,arm1020e,arm1022e,xscale,iwmmxt,iwmmxt2,arm926ejs,arm1026ejs,arm1136js,arm1136jfs,arm1176jzs,arm1176jzfs,mpcorenovfp,mpcore,arm1156t2s,arm1156t2fs,cortexa5,cortexa8,cortexa9,cortexr4,cortexr4f,cortexm4,cortexm3,cortexm1,cortexm0"
+ "arm2,arm250,arm3,arm6,arm60,arm600,arm610,arm620,arm7,arm7d,arm7di,arm70,arm700,arm700i,arm710,arm720,arm710c,arm7100,arm7500,arm7500fe,arm7m,arm7dm,arm7dmi,arm8,arm810,strongarm,strongarm110,strongarm1100,strongarm1110,fa526,arm7tdmi,arm7tdmis,arm710t,arm720t,arm740t,arm9,arm9tdmi,arm920,arm920t,arm922t,arm940t,ep9312,arm10tdmi,arm1020t,arm9e,arm946es,arm966es,arm968es,arm10e,arm1020e,arm1022e,xscale,iwmmxt,iwmmxt2,arm926ejs,arm1026ejs,arm1136js,arm1136jfs,arm1176jzs,arm1176jzfs,mpcorenovfp,mpcore,arm1156t2s,arm1156t2fs,cortexa5,cortexa8,cortexa9,cortexr4,cortexr4f,cortexm4,cortexm3,cortexm1,cortexm0"
(const (symbol_ref "((enum attr_tune) arm_tune)")))
--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -52,7 +52,8 @@
/* The BPABI integer comparison routines return { -1, 0, 1 }. */
#define TARGET_LIB_INT_CMP_BIASED !TARGET_BPABI
-#define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*|march=armv4:--fix-v4bx}"
+#define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*\
+|march=armv4|mcpu=fa526:--fix-v4bx}"
#define BE8_LINK_SPEC " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5|mcpu=cortex-a8|mcpu=cortex-a9:%{!r:--be8}}}"
--- /dev/null
+++ b/gcc/config/arm/fa526.md
@@ -0,0 +1,161 @@
+;; Faraday FA526 Pipeline Description
+;; Copyright (C) 2010 Free Software Foundation, Inc.
+;; Written by I-Jui Sung, based on ARM926EJ-S Pipeline Description.
+
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify it under
+;; the terms of the GNU General Public License as published by the Free
+;; Software Foundation; either version 3, or (at your option) any later
+;; version.
+;;
+;; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+;; WARRANTY; without even the implied warranty of MERCHANTABILITY or
+;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+;; for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>. */
+
+;; These descriptions are based on the information contained in the
+;; FA526 Core Design Note, Copyright (c) 2010 Faraday Technology Corp.
+;;
+;; Modeled pipeline characteristics:
+;; LD -> any use: latency = 3 (2 cycle penalty).
+;; ALU -> any use: latency = 2 (1 cycle penalty).
+
+;; This automaton provides a pipeline description for the Faraday
+;; FA526 core.
+;;
+;; The model given here assumes that the condition for all conditional
+;; instructions is "true", i.e., that all of the instructions are
+;; actually executed.
+
+(define_automaton "fa526")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Pipelines
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; There is a single pipeline
+;;
+;; The ALU pipeline has fetch, decode, execute, memory, and
+;; write stages. We only need to model the execute, memory and write
+;; stages.
+
+;; S E M W
+
+(define_cpu_unit "fa526_core" "fa526")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; ALU Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; ALU instructions require two cycles to execute, and use the ALU
+;; pipeline in each of the three stages. The results are available
+;; after the execute stage stage has finished.
+;;
+;; If the destination register is the PC, the pipelines are stalled
+;; for several cycles. That case is not modeled here.
+
+;; ALU operations
+(define_insn_reservation "526_alu_op" 1
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "alu"))
+ "fa526_core")
+
+(define_insn_reservation "526_alu_shift_op" 2
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "alu_shift,alu_shift_reg"))
+ "fa526_core")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Multiplication Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define_insn_reservation "526_mult1" 2
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "insn" "smlalxy,smulxy,smlaxy,smlalxy"))
+ "fa526_core")
+
+(define_insn_reservation "526_mult2" 5
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "insn" "mul,mla,muls,mlas,umull,umlal,smull,smlal,umulls,\
+ umlals,smulls,smlals,smlawx"))
+ "fa526_core*4")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Load/Store Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; The models for load/store instructions do not accurately describe
+;; the difference between operations with a base register writeback
+;; (such as "ldm!"). These models assume that all memory references
+;; hit in dcache.
+
+(define_insn_reservation "526_load1_op" 3
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "load1,load_byte"))
+ "fa526_core")
+
+(define_insn_reservation "526_load2_op" 4
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "load2"))
+ "fa526_core*2")
+
+(define_insn_reservation "526_load3_op" 5
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "load3"))
+ "fa526_core*3")
+
+(define_insn_reservation "526_load4_op" 6
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "load4"))
+ "fa526_core*4")
+
+(define_insn_reservation "526_store1_op" 0
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "store1"))
+ "fa526_core")
+
+(define_insn_reservation "526_store2_op" 1
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "store2"))
+ "fa526_core*2")
+
+(define_insn_reservation "526_store3_op" 2
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "store3"))
+ "fa526_core*3")
+
+(define_insn_reservation "526_store4_op" 3
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "store4"))
+ "fa526_core*4")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Branch and Call Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; Branch instructions are difficult to model accurately. The FA526
+;; core can predict most branches. If the branch is predicted
+;; correctly, and predicted early enough, the branch can be completely
+;; eliminated from the instruction stream. Some branches can
+;; therefore appear to require zero cycle to execute. We assume that
+;; all branches are predicted correctly, and that the latency is
+;; therefore the minimum value.
+
+(define_insn_reservation "526_branch_op" 0
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "branch"))
+ "fa526_core")
+
+;; The latency for a call is actually the latency when the result is available.
+;; i.e. R0 ready for int return value. For most cases, the return value is set
+;; by a mov instruction, which has 1 cycle latency.
+(define_insn_reservation "526_call_op" 1
+ (and (eq_attr "tune" "fa526")
+ (eq_attr "type" "call"))
+ "fa526_core")
+
--- a/gcc/config/arm/t-arm
+++ b/gcc/config/arm/t-arm
@@ -24,6 +24,7 @@ MD_INCLUDES= $(srcdir)/config/arm/arm-t
$(srcdir)/config/arm/arm1020e.md \
$(srcdir)/config/arm/arm1026ejs.md \
$(srcdir)/config/arm/arm1136jfs.md \
+ $(srcdir)/config/arm/fa526.md \
$(srcdir)/config/arm/arm926ejs.md \
$(srcdir)/config/arm/cirrus.md \
$(srcdir)/config/arm/fpa.md \
--- a/gcc/config/arm/t-arm-elf
+++ b/gcc/config/arm/t-arm-elf
@@ -36,6 +36,10 @@ MULTILIB_DIRNAMES = arm thumb
MULTILIB_EXCEPTIONS =
MULTILIB_MATCHES =
+#MULTILIB_OPTIONS += mcpu=fa526
+#MULTILIB_DIRNAMES += fa526
+#MULTILIB_EXCEPTIONS += *mthumb*/*mcpu=fa526
+
#MULTILIB_OPTIONS += march=armv7
#MULTILIB_DIRNAMES += thumb2
#MULTILIB_EXCEPTIONS += march=armv7* marm/*march=armv7*
@@ -52,6 +56,7 @@ MULTILIB_MATCHES =
MULTILIB_OPTIONS += mfloat-abi=hard
MULTILIB_DIRNAMES += fpu
MULTILIB_EXCEPTIONS += *mthumb/*mfloat-abi=hard*
+MULTILIB_EXCEPTIONS += *mcpu=fa526/*mfloat-abi=hard*
# MULTILIB_OPTIONS += mcpu=ep9312
# MULTILIB_DIRNAMES += ep9312
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -9900,7 +9900,8 @@ assembly code. Permissible names are: @
@samp{cortex-r4}, @samp{cortex-r4f}, @samp{cortex-m4}, @samp{cortex-m3},
@samp{cortex-m1},
@samp{cortex-m0},
-@samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312}.
+@samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312},
+@samp{fa526}.
@item -mtune=@var{name}
@opindex mtune
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