target: add symbols for i386/x86_64 cpu features

Selecting the target subarchitecture variant automatically selects the
appropriated set of features.

[thomas.petazzoni@free-electrons.com:
  removed depends on inside hidden options, not needed.
  removed SSE41/SSE42 options, not used.]

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

target/Config.in.arch

@@ -322,6 +322,19 @@ endchoice
 # gcc builds libstdc++ differently depending on the
 # host tuplet given to it, so let people choose
 #
+
+# i386/x86_64 cpu features
+config BR2_X86_CPU_HAS_MMX
+	bool
+config BR2_X86_CPU_HAS_SSE
+	bool
+config BR2_X86_CPU_HAS_SSE2
+	bool
+config BR2_X86_CPU_HAS_SSE3
+	bool
+config BR2_X86_CPU_HAS_SSSE3
+	bool
+
 choice
 	prompt "Target Architecture Variant"
 	depends on BR2_i386
@@ -341,46 +354,95 @@ config BR2_x86_pentiumpro
 	bool "pentium pro"
 config BR2_x86_pentium_mmx
 	bool "pentium MMX"
+	select BR2_X86_CPU_HAS_MMX
 config BR2_x86_pentium_m
 	bool "pentium mobile"
 config BR2_x86_pentium2
 	bool "pentium2"
+	select BR2_X86_CPU_HAS_MMX
 config BR2_x86_pentium3
 	bool "pentium3"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
 config BR2_x86_pentium4
 	bool "pentium4"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
 config BR2_x86_prescott
 	bool "prescott"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
 config BR2_x86_nocona
 	bool "nocona"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
 config BR2_x86_core2
 	bool "core2"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
+	select BR2_X86_CPU_HAS_SSSE3
 config BR2_x86_atom
 	bool "atom"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
+	select BR2_X86_CPU_HAS_SSSE3
 config BR2_x86_k6
 	bool "k6"
+	select BR2_X86_CPU_HAS_MMX
 config BR2_x86_k6_2
 	bool "k6-2"
+	select BR2_X86_CPU_HAS_MMX
 config BR2_x86_athlon
 	bool "athlon"
+	select BR2_X86_CPU_HAS_MMX
 config BR2_x86_athlon_4
 	bool "athlon-4"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
 config BR2_x86_opteron
 	bool "opteron"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
 config BR2_x86_opteron_sse3
 	bool "opteron w/ SSE3"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
 config BR2_x86_barcelona
 	bool "barcelona"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
 config BR2_x86_geode
 	bool "geode"
+	# Don't include MMX support because there several variant of geode
+	# processor, some with MMX support, some without.
+	# See: http://en.wikipedia.org/wiki/Geode_%28processor%29
 config BR2_x86_c3
 	bool "Via/Cyrix C3 (Samuel/Ezra cores)"
+	select BR2_X86_CPU_HAS_MMX
 config BR2_x86_c32
 	bool "Via C3-2 (Nehemiah cores)"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
 config BR2_x86_winchip_c6
 	bool "IDT Winchip C6"
+	select BR2_X86_CPU_HAS_MMX
 config BR2_x86_winchip2
 	bool "IDT Winchip 2"
+	select BR2_X86_CPU_HAS_MMX
 endchoice
 
 choice
@@ -394,16 +456,42 @@ config BR2_x86_64_generic
 	bool "generic"
 config BR2_x86_64_barcelona
 	bool "barcelona"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_3DNOW
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
 config BR2_x86_64_opteron_sse3
 	bool "opteron w/ sse3"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
 config BR2_x86_64_opteron
 	bool "opteron"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
 config BR2_x86_64_nocona
 	bool "nocona"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
 config BR2_x86_64_core2
 	bool "core2"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
+	select BR2_X86_CPU_HAS_SSSE3
 config BR2_x86_64_atom
 	bool "atom"
+	select BR2_X86_CPU_HAS_MMX
+	select BR2_X86_CPU_HAS_SSE
+	select BR2_X86_CPU_HAS_SSE2
+	select BR2_X86_CPU_HAS_SSE3
+	select BR2_X86_CPU_HAS_SSSE3
 endchoice
 
 choice