Update x86 tune files

index 18865b7..fafc28a 100644
@@ -1,4 +1,4 @@
-require conf/machine/include/ia32/arch-ia32.inc
+require conf/machine/include/x86/arch-x86.inc
 
 TUNEVALID[c3] = "VIA Cyrix III or VIA C3 specific optimizations"
 TUNECONFLICTS[c3] = "m64 mx32"

index 4542b9b..a315b35 100644
@@ -1,6 +1,6 @@
 DEFAULTTUNE ?= "i586"
 
-require conf/machine/include/ia32/arch-ia32.inc
+require conf/machine/include/x86/arch-x86.inc
 
 # Extra tune features
 TUNEVALID[i586] = "Enable i586 specific processor optimizations"

index 31e06da..ae48124 100644
@@ -1,4 +1,4 @@
 DEFAULTTUNE ?= "x86-64"
 
-require conf/machine/include/ia32/arch-ia32.inc
+require conf/machine/include/x86/arch-x86.inc
 

similarity index 75%
rename from meta/conf/machine/include/ia32-base.inc
rename to meta/conf/machine/include/x86-base.inc
index e15f927..421bdee 100644
@@ -1,5 +1,5 @@
 #
-# base machine settings for ia32-architecture BSPs
+# Base machine settings for Intel architecture BSPs
 #
 
 #

@@ -25,28 +25,28 @@ PREFERRED_VERSION_linux-yocto ??= "3.0%"
 #
 # XSERVER subcomponents, used to build the XSERVER variable
 #
-XSERVER_IA32_BASE = "xserver-xorg \
+XSERVER_INTEL_BASE = "xserver-xorg \
            xf86-input-mouse \
            xf86-input-keyboard \
            xf86-input-evdev \
            xf86-input-synaptics \
            "
 
-XSERVER_IA32_EXT = " \
+XSERVER_INTEL_EXT = " \
            ${@base_contains('DISTRO_FEATURES', 'opengl', 'xserver-xorg-extension-glx', '', d)} \
            xserver-xorg-module-libint10 \
            "
 
-XSERVER_IA32_I915 = "xf86-video-intel \
+XSERVER_INTEL_I915 = "xf86-video-intel \
            ${@base_contains('DISTRO_FEATURES', 'opengl', 'mesa-driver-i915', '', d)} \
            "
 
-XSERVER_IA32_I965 = "xf86-video-intel \
+XSERVER_INTEL_I965 = "xf86-video-intel \
            ${@base_contains('DISTRO_FEATURES', 'opengl', 'mesa-driver-i965', '', d)} \
            "
 
-XSERVER_IA32_VESA = "xf86-video-vesa"
+XSERVER_INTEL_VESA = "xf86-video-vesa"
 
-XSERVER_IA32_FBDEV = "xf86-video-fbdev"
+XSERVER_INTEL_FBDEV = "xf86-video-fbdev"
 
-XSERVER_IA32_MODESETTING = "xf86-video-modesetting"
+XSERVER_INTEL_MODESETTING = "xf86-video-modesetting"

similarity index 81%
rename from meta/conf/machine/include/ia32/README
rename to meta/conf/machine/include/x86/README
index 8f80a5b..d8b6793 100644
@@ -1,12 +1,12 @@
 2012/03/30 - Mark Hatle <[email protected]>
  - Initial version
 
-Most of the items for the IA architecture are defined in the single 
-arch-ia32 file.
+Most of the items for the Intel architectures are defined in the single 
+arch-x86 file.
 
 Three ABIs are define, m32, mx32 and m64.
 
-The following is the list of ia32 specific variables:
+The following is the list of intel specific variables:
 
 X86ARCH32 - This is the 32-bit architecture GNU canonical arch, TUNE_ARCH.
 

similarity index 97%
rename from meta/conf/machine/include/ia32/arch-ia32.inc
rename to meta/conf/machine/include/x86/arch-x86.inc
index aa83896..298bddc 100644
@@ -1,5 +1,5 @@
 #
-# IA32 Architecture definition
+# X86 Architecture definition (IA32, X86_64, and X32)
 #
 
 DEFAULTTUNE ?= "x86"

new file mode 100644
index 0000000..5464fed
@@ -0,0 +1,35 @@
+# Settings for the GCC(1) cpu-type "corei7":
+#
+#     Intel Core i7 CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1
+#     and SSE4.2 instruction set support.
+#
+# This tune is recommended for Intel Nehalem and Silvermont (e.g. Bay Trail) CPUs
+# (and beyond).
+#
+DEFAULTTUNE ?= "corei7-64"
+
+# Pull in the previous tune in to pull in PACKAGE_EXTRA_ARCHS
+require conf/machine/include/tune-core2.inc
+
+# Extra tune features
+TUNEVALID[corei7] = "Enable corei7 specific processor optimizations"
+TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "corei7", " -march=corei7 -mtune=corei7 -mfpmath=sse -msse4.2", "", d)}"
+
+# Extra tune selections
+AVAILTUNES += "corei7-32"
+TUNE_FEATURES_tune-corei7-32 = "${TUNE_FEATURES_tune-x86} corei7"
+BASE_LIB_tune-corei7-32 = "lib"
+TUNE_PKGARCH_tune-corei7-32 = "corei7_32"
+PACKAGE_EXTRA_ARCHS_tune-corei7-32 = "${PACKAGE_EXTRA_ARCHS_tune-core2} corei7_32"
+
+AVAILTUNES += "corei7-64"
+TUNE_FEATURES_tune-corei7-64 = "${TUNE_FEATURES_tune-x86-64} corei7"
+BASE_LIB_tune-corei7-64 = "lib64"
+TUNE_PKGARCH_tune-corei7-64 = "corei7_64"
+PACKAGE_EXTRA_ARCHS_tune-corei7-64 = "${PACKAGE_EXTRA_ARCHS_tune-core2-64} corei7_64"
+
+AVAILTUNES += "corei7-64-x32"
+TUNE_FEATURES_tune-corei7-64-x32 = "${TUNE_FEATURES_tune-x86-64-x32} corei7"
+BASE_LIB_tune-corei7-64-x32 = "libx32"
+TUNE_PKGARCH_tune-corei7-64-x32 = "corei7_64_x32"
+PACKAGE_EXTRA_ARCHS_tune-corei7-64-x32 = "${PACKAGE_EXTRA_ARCHS_tune-core2-64-x32} corei7_64_x32"

deleted file mode 100644
index ae48124..0000000
@@ -1,4 +0,0 @@
-DEFAULTTUNE ?= "x86-64"
-
-require conf/machine/include/x86/arch-x86.inc
-

index 6c390ad..d66130a 100644
@@ -53,10 +53,10 @@ list should be dynamic! i.e.
 ${@bb.utils.contains("TUNE_FEATURES", "feature", "cflag", "!cflag", d)}
 
 TUNE_ARCH - The GNU canonical arch for a specific architecture.  i.e.
-arm, armeb, mips, mips64, etc.  This value is by bitbake to setup
+arm, armeb, mips, mips64, etc.  This value is used by bitbake to setup
 configure. TUNE_ARCH definitions are specific to a given architecture.
-They may be a single static definitions, or may be dynamically adjusted.
-See each architectures README for details for that CPU family.
+They may be a single static definition, or may be dynamically adjusted.
+See each architecture's README for details for that CPU family.
 
 TUNE_PKGARCH - The package architecture used by the packaging systems to
 define the architecture, abi and tuning of a particular package.

index c572225..6533e56 100644
@@ -8,7 +8,8 @@ PREFERRED_PROVIDER_virtual/libgles1 ?= "mesa"
 PREFERRED_PROVIDER_virtual/libgles2 ?= "mesa"
 
 require conf/machine/include/qemu.inc
-require conf/machine/include/tune-x86_64.inc
+DEFAULTTUNE ?= "core2-64"
+require conf/machine/include/tune-core2.inc
 
 KERNEL_IMAGETYPE = "bzImage"
 

index c5ef358..8b24c18 100644
@@ -1,4 +1,4 @@
-include conf/machine/include/ia32-base.inc
+include conf/machine/include/x86-base.inc
 MACHINE_FEATURES += "wifi efi pcbios"
 
 PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"

index a6154cd..f76e35a 100644
@@ -4,5 +4,5 @@
 #@DESCRIPTION: Machine configuration for generic X86_64 (64-bit) PCs and servers. Supports a moderately wide range of drivers that should boot and be usable on "typical" hardware.
 
 DEFAULTTUNE ?= "core2-64"
-include conf/machine/include/tune-core2.inc
-include conf/machine/include/genericx86-common.inc
+require conf/machine/include/tune-core2.inc
+require conf/machine/include/genericx86-common.inc

index 549fc8e..2642cab 100644
@@ -4,5 +4,5 @@
 #@DESCRIPTION: Machine configuration for generic X86 (32-bit) PCs. Supports a moderately wide range of drivers that should boot and be usable on "typical" hardware.
 
 DEFAULTTUNE ?= "core2-32"
-include conf/machine/include/tune-core2.inc
-include conf/machine/include/genericx86-common.inc
+require conf/machine/include/tune-core2.inc
+require conf/machine/include/genericx86-common.inc

index a315b35..5fbb3c7 100644
@@ -11,4 +11,4 @@ AVAILTUNES += "i586"
 TUNE_FEATURES_tune-i586 = "${TUNE_FEATURES_tune-x86} i586"
 BASE_LIB_tune-i586 = "lib"
 TUNE_PKGARCH_tune-i586 = "i586"
-PACKAGE_EXTRA_ARCHS_tune-i586 = "${PACKAGE_EXTRA_ARCHS_tune-x86} i386 i486 i586"
+PACKAGE_EXTRA_ARCHS_tune-i586 = "${PACKAGE_EXTRA_ARCHS_tune-x86} i586"

index 85b6924..3b25197 100644
@@ -1,10 +1,18 @@
+# Settings for the GCC(1) cpu-type "core2":
+#
+#      Intel Core2 CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3 and SSSE3
+#      instruction set support.
+#
+# This tune is recommended for the Intel Core 2 CPU family, including Conroe,
+# Merom and beyond, as well as the first Atom CPUs, Diamondville, and beyond.
+#
 DEFAULTTUNE ?= "core2"
 
 require conf/machine/include/tune-i586.inc
 
 # Extra tune features
 TUNEVALID[core2] = "Enable core2 specific processor optimizations"
-TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "core2", " -march=core2 -msse3 -mtune=generic -mfpmath=sse", "", d)}"
+TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "core2", " -march=core2 -mtune=core2 -msse3 -mfpmath=sse", "", d)}"
 
 # Extra tune selections
 AVAILTUNES += "core2"

index 2500a74..11517dc 100644
@@ -6,7 +6,7 @@
 # This tune is recommended for the Intel Core 2 CPU family, including Conroe,
 # Merom and beyond, as well as the first Atom CPUs, Diamondville, and beyond.
 #
-DEFAULTTUNE ?= "core2"
+DEFAULTTUNE ?= "core2-32"
 
 # Include the previous tune to pull in PACKAGE_EXTRA_ARCHS
 require conf/machine/include/tune-i586.inc

@@ -16,11 +16,11 @@ TUNEVALID[core2] = "Enable core2 specific processor optimizations"
 TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "core2", " -march=core2 -mtune=core2 -msse3 -mfpmath=sse", "", d)}"
 
 # Extra tune selections
-AVAILTUNES += "core2"
-TUNE_FEATURES_tune-core2 = "${TUNE_FEATURES_tune-x86} core2"
-BASE_LIB_tune-core2 = "lib"
-TUNE_PKGARCH_tune-core2 = "core2"
-PACKAGE_EXTRA_ARCHS_tune-core2 = "${PACKAGE_EXTRA_ARCHS_tune-i586} core2"
+AVAILTUNES += "core2-32"
+TUNE_FEATURES_tune-core2-32 = "${TUNE_FEATURES_tune-x86} core2"
+BASE_LIB_tune-core2-32 = "lib"
+TUNE_PKGARCH_tune-core2-32 = "core2_32"
+PACKAGE_EXTRA_ARCHS_tune-core2-32 = "${PACKAGE_EXTRA_ARCHS_tune-i586} core2_32"
 
 AVAILTUNES += "core2-64"
 TUNE_FEATURES_tune-core2-64 = "${TUNE_FEATURES_tune-x86-64} core2"

index 65d0942..6c390ad 100644
@@ -1,6 +1,9 @@
 2012/03/30 - Mark Hatle <[email protected]>
  - Initial Revision
 
+
+Introduction
+============
 The individual CPU, and ABI tunings are contained in this directory.  A
 number of local and global variables are used to control the way the
 tunings are setup and how they work together to specify an optimized

@@ -79,3 +82,19 @@ configured in the same way that TUNE_CCARGS is.
 BASE_LIB_tune-<tune> - The "/lib" location for a specific ABI.  This is
 used in a multilib configuration to place the libraries in the correct,
 non-conflicting locations.
+
+
+Best Practice
+=============
+The tune infrastructure is designed to be hierarchical. When writing a
+new tune file for a "fast-forward" CPU architecture (one that supports
+everything from a previous generation), it is recommended to require the
+previous generation tune file and specify PACKAGE_EXTRA_ARCHS using the
+previous generation's override and appending the new tune. Note that
+only one previous tune file should be included to avoid mutiple includes
+of the base arch which could lead to a broken configuration due to
+multiple prepend and append assignments.
+
+For example, for x86, there is a common x86/arch-x86.inc which is
+included in the base i586 tune file. The core2 tune builds
+on that, and corei7 builds on core2.

index 3b25197..2500a74 100644
@@ -8,6 +8,7 @@
 #
 DEFAULTTUNE ?= "core2"
 
+# Include the previous tune to pull in PACKAGE_EXTRA_ARCHS
 require conf/machine/include/tune-i586.inc
 
 # Extra tune features

@@ -19,7 +20,7 @@ AVAILTUNES += "core2"
 TUNE_FEATURES_tune-core2 = "${TUNE_FEATURES_tune-x86} core2"
 BASE_LIB_tune-core2 = "lib"
 TUNE_PKGARCH_tune-core2 = "core2"
-PACKAGE_EXTRA_ARCHS_tune-core2 = "${PACKAGE_EXTRA_ARCHS_tune-x86} i386 i486 i586 i686 core2"
+PACKAGE_EXTRA_ARCHS_tune-core2 = "${PACKAGE_EXTRA_ARCHS_tune-i586} core2"
 
 AVAILTUNES += "core2-64"
 TUNE_FEATURES_tune-core2-64 = "${TUNE_FEATURES_tune-x86-64} core2"

index 9d29f62..549fc8e 100644
@@ -3,5 +3,6 @@
 
 #@DESCRIPTION: Machine configuration for generic X86 (32-bit) PCs. Supports a moderately wide range of drivers that should boot and be usable on "typical" hardware.
 
-include conf/machine/include/tune-atom.inc
+DEFAULTTUNE ?= "core2-32"
+include conf/machine/include/tune-core2.inc
 include conf/machine/include/genericx86-common.inc

index 56e9bb6..a6154cd 100644
@@ -3,5 +3,6 @@
 
 #@DESCRIPTION: Machine configuration for generic X86_64 (64-bit) PCs and servers. Supports a moderately wide range of drivers that should boot and be usable on "typical" hardware.
 
-include conf/machine/include/tune-x86_64.inc
+DEFAULTTUNE ?= "core2-64"
+include conf/machine/include/tune-core2.inc
 include conf/machine/include/genericx86-common.inc

index e4b59c9..65d0942 100644
@@ -1,27 +1,27 @@
 2012/03/30 - Mark Hatle <[email protected]>
  - Initial Revision
 
-The individual CPU, and ABI tunings are contained in this directory.  A 
-number of local and global variables are used to control the way the 
-tunings are setup and how they work together to specify an optimized 
+The individual CPU, and ABI tunings are contained in this directory.  A
+number of local and global variables are used to control the way the
+tunings are setup and how they work together to specify an optimized
 configuration.
 
-The following is brief summary of the generic components that are used 
+The following is brief summary of the generic components that are used
 in these tunings.
 
-AVAILTUNES - This is a list of all of the tuning definitions currently 
-available in the system.  Not all tunes in this list may be compatible 
-with the machine configuration, or each other in a multilib 
-configuration.  Each tuning file can add to this list using "+=", but 
+AVAILTUNES - This is a list of all of the tuning definitions currently
+available in the system.  Not all tunes in this list may be compatible
+with the machine configuration, or each other in a multilib
+configuration.  Each tuning file can add to this list using "+=", but
 should never replace the list using "=".
 
-DEFAULTTUNE - This specifies the tune to use for a particular build.  
-Each tune should specify a reasonable default, which can be overriden by 
-a machine or multilib configuration.  The specified tune must be listed 
+DEFAULTTUNE - This specifies the tune to use for a particular build.
+Each tune should specify a reasonable default, which can be overriden by
+a machine or multilib configuration.  The specified tune must be listed
 in the AVAILTUNES.
 
-TUNEVALID[feature] - The <feature> is defined with a human readable 
-explanation for what it does.  All architectural, cpu, abi, etc tuning 
+TUNEVALID[feature] - The <feature> is defined with a human readable
+explanation for what it does.  All architectural, cpu, abi, etc tuning
 features must be defined using TUNEVALID.
 
 TUNECONFLICTS[feature] - A list of features which conflict with <feature>.

@@ -31,51 +31,51 @@ tuning ends up with features which conflict with each other.
 TUNE_FEATURES - This is automatically defined as TUNE_FEATURES_tune-<tune>.
 See TUNE_FEATURES_tune-<tune> for more information.
 
-TUNE_FEATURES_tune-<tune> - Specify the features used to describe a 
-specific tune.  This is a list of features that a tune support, each 
-feature must be in the TUNEVALID list.  Note: the tune and a given 
-feature name may be the same, but they have different purposes.  Only 
-features may be used to change behavior, while tunes are used to 
+TUNE_FEATURES_tune-<tune> - Specify the features used to describe a
+specific tune.  This is a list of features that a tune support, each
+feature must be in the TUNEVALID list.  Note: the tune and a given
+feature name may be the same, but they have different purposes.  Only
+features may be used to change behavior, while tunes are used to
 describe an overall set of features.
 
-ABIEXTENSION - An ABI extension may be specified by a specific feature 
-or other tuning setting, such as TARGET_FPU.  Any ABI extensions either 
-need to be defined in the architectures base arch file, i.e.  
-ABIEXTENSION = "eabi" in the arm case, or appended to in specific tune 
+ABIEXTENSION - An ABI extension may be specified by a specific feature
+or other tuning setting, such as TARGET_FPU.  Any ABI extensions either
+need to be defined in the architectures base arch file, i.e.
+ABIEXTENSION = "eabi" in the arm case, or appended to in specific tune
 files with a ".=".  Spaces are not allowed in this variable.
 
-TUNE_CCARGS - Setup the cflags based on the TUNE_FEATURES settings.  
-These should be additive when defined using "+=".  All items in this 
-list should be dynamic! i.e. 
+TUNE_CCARGS - Setup the cflags based on the TUNE_FEATURES settings.
+These should be additive when defined using "+=".  All items in this
+list should be dynamic! i.e.
 ${@bb.utils.contains("TUNE_FEATURES", "feature", "cflag", "!cflag", d)}
 
-TUNE_ARCH - The GNU canonical arch for a specific architecture.  i.e. 
-arm, armeb, mips, mips64, etc.  This value is by bitbake to setup 
-configure. TUNE_ARCH definitions are specific to a given architecture.  
-They may be a single static definitions, or may be dynamically adjusted.  
+TUNE_ARCH - The GNU canonical arch for a specific architecture.  i.e.
+arm, armeb, mips, mips64, etc.  This value is by bitbake to setup
+configure. TUNE_ARCH definitions are specific to a given architecture.
+They may be a single static definitions, or may be dynamically adjusted.
 See each architectures README for details for that CPU family.
 
-TUNE_PKGARCH - The package architecture used by the packaging systems to 
-define the architecture, abi and tuning of a particular package.  
-Similarly to TUNE_ARCH, the definition of TUNE_PKGARCH is specific to 
-each architecture. See each architectures README for details for that 
+TUNE_PKGARCH - The package architecture used by the packaging systems to
+define the architecture, abi and tuning of a particular package.
+Similarly to TUNE_ARCH, the definition of TUNE_PKGARCH is specific to
+each architecture. See each architectures README for details for that
 CPU family.
 
-PACKAGE_EXTRA_ARCHS - Lists all runtime compatible package 
-architectures.  By default this is equal to 
-PACKAGE_EXTRA_ARCHS_tune-<tune>.  If an architecture deviates from the 
+PACKAGE_EXTRA_ARCHS - Lists all runtime compatible package
+architectures.  By default this is equal to
+PACKAGE_EXTRA_ARCHS_tune-<tune>.  If an architecture deviates from the
 default it will be listed in the architecture README.
 
-PACKAGE_EXTRA_ARCHS_tune-<tune> - List all of the package architectures 
-that are compatible with this specific tune.  The package arch of this 
+PACKAGE_EXTRA_ARCHS_tune-<tune> - List all of the package architectures
+that are compatible with this specific tune.  The package arch of this
 tune must be in the list.
 
-TARGET_FPU - The FPU setting for a given tune, hard (generate floating 
-point instructions), soft (generate internal gcc calls), "other" 
-architecture specific floating point.  This is synchronized with the 
-compiler and other toolchain items.  This should be dynamically 
+TARGET_FPU - The FPU setting for a given tune, hard (generate floating
+point instructions), soft (generate internal gcc calls), "other"
+architecture specific floating point.  This is synchronized with the
+compiler and other toolchain items.  This should be dynamically
 configured in the same way that TUNE_CCARGS is.
 
-BASE_LIB_tune-<tune> - The "/lib" location for a specific ABI.  This is 
-used in a multilib configuration to place the libraries in the correct, 
+BASE_LIB_tune-<tune> - The "/lib" location for a specific ABI.  This is
+used in a multilib configuration to place the libraries in the correct,
 non-conflicting locations.