关于GCC对cpu类型的支持

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最新推荐文章于 2022-09-19 10:47:47 发布

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本文介绍了一次GCC更新中新增对Cortex-A15处理器的支持情况。更新包括了配置文件的修改，以适配新的处理器特性，并在文档中进行了相应的记录。

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Q：如何获取gcc对cpu类型的支持呢？

A：从下面的内容信息可获知。

http://gcc.gnu.org/ml/gcc-patches/2010-09/msg00824.html

--------------------------------------------------------------------------------

2010-09-09  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
    
        * config/arm/bpabi.h (BE8_LINK_SPEC): Handle cortex-a15.
        * config/arm/arm-cores.def (cortex-a15): New core. Treat it as a
v7-a.
        * config/arm/arm-tune.md: Regenerate.
        * doc/invoke.texi (ARM Options): Document it.

--

Index: gcc/config/arm/arm-cores.def
===================================================================
--- gcc/config/arm/arm-cores.def	(revision 164080)
+++ gcc/config/arm/arm-cores.def	(working copy)
@@ -121,6 +121,7 @@ ARM_CORE("arm1156t2f-s",  arm1156t2fs,  
 ARM_CORE("cortex-a5",	  cortexa5,	7A,				 FL_LDSCHED, 9e)
 ARM_CORE("cortex-a8",	  cortexa8,	7A,				 FL_LDSCHED, 9e)
 ARM_CORE("cortex-a9",	  cortexa9,	7A,				 FL_LDSCHED, cortex_a9)
+ARM_CORE("cortex-a15",	  cortexa15,	7A,				 FL_LDSCHED, 9e)
 ARM_CORE("cortex-r4",	  cortexr4,	7R,				 FL_LDSCHED, 9e)
 ARM_CORE("cortex-r4f",	  cortexr4f,	7R,				 FL_LDSCHED, 9e)
 ARM_CORE("cortex-m4",	  cortexm4,	7EM,				 FL_LDSCHED, 9e)
Index: gcc/config/arm/arm-tune.md
===================================================================
--- gcc/config/arm/arm-tune.md	(revision 164080)
+++ gcc/config/arm/arm-tune.md	(working copy)
@@ -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,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,cortexa15,cortexr4,cortexr4f,cortexm4,cortexm3,cortexm1,cortexm0"
 	(const (symbol_ref "((enum attr_tune) arm_tune)")))
Index: gcc/config/arm/bpabi.h
===================================================================
--- gcc/config/arm/bpabi.h	(revision 164080)
+++ gcc/config/arm/bpabi.h	(working copy)
@@ -53,7 +53,7 @@
 
 #define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*|march=armv4:--fix-v4bx}"
 
-#define BE8_LINK_SPEC " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5|mcpu=cortex-a8|mcpu=cortex-a9:%{!r:--be8}}}"
+#define BE8_LINK_SPEC " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5|mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15:%{!r:--be8}}}"
 
 /* Tell the assembler to build BPABI binaries.  */
 #undef  SUBTARGET_EXTRA_ASM_SPEC
Index: gcc/doc/invoke.texi
===================================================================
--- gcc/doc/invoke.texi	(revision 164080)
+++ gcc/doc/invoke.texi	(working copy)
@@ -10121,7 +10121,7 @@ assembly code.  Permissible names are: @
 @samp{arm10e}, @samp{arm1020e}, @samp{arm1022e},
 @samp{arm1136j-s}, @samp{arm1136jf-s}, @samp{mpcore}, @samp{mpcorenovfp},
 @samp{arm1156t2-s}, @samp{arm1156t2f-s}, @samp{arm1176jz-s}, @samp{arm1176jzf-s},
-@samp{cortex-a5}, @samp{cortex-a8}, @samp{cortex-a9},
+@samp{cortex-a5}, @samp{cortex-a8}, @samp{cortex-a9}, @samp{cortex-a15},
 @samp{cortex-r4}, @samp{cortex-r4f}, @samp{cortex-m4}, @samp{cortex-m3},
 @samp{cortex-m1},
 @samp{cortex-m0},

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