[Buildroot] [PATCH v5 1/5] target: add symbols for i386/x86_64 cpu features
Samuel Martin
s.martin49 at gmail.com
Mon Jul 16 21:37:26 UTC 2012
Selecting the target subarchitecture variant automatically selects the
appropriated set of features.
Signed-off-by: Samuel Martin <s.martin49 at gmail.com>
---
Notes:
- Only CPU features used by some packages have been added.
- Subarchitecture options select their features accordingly gcc manual.
- The dependencies are explained with a list of "select" for each
subarchitecture, because, IMO, this makes the code clearer and easy to maintain
instaed of having a long list of symbols in the "depends on" statement for each
CPU feature.
- MMX support is one of these CPU features. Some variants of the Geode
subarchitecture have MMX, others do not. To keep the same behavior as before,
which is IMO, the safe way, selecting Geode as architecture variant does not
enable MMX support.
diff --git a/target/Config.in.arch b/target/Config.in.arch
index bad0f4c..d94bed5 100644
--- a/target/Config.in.arch
+++ b/target/Config.in.arch
@@ -322,6 +322,30 @@ 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
+ depends on BR2_i386 || BR2_x86_64
+ bool
+config BR2_X86_CPU_HAS_SSE
+ depends on BR2_i386 || BR2_x86_64
+ bool
+config BR2_X86_CPU_HAS_SSE2
+ depends on BR2_i386 || BR2_x86_64
+ bool
+config BR2_X86_CPU_HAS_SSE3
+ depends on BR2_i386 || BR2_x86_64
+ bool
+config BR2_X86_CPU_HAS_SSSE3
+ depends on BR2_i386 || BR2_x86_64
+ bool
+config BR2_X86_CPU_HAS_SSE41
+ depends on BR2_i386 || BR2_x86_64
+ bool
+config BR2_X86_CPU_HAS_SSE42
+ depends on BR2_i386 || BR2_x86_64
+ bool
+
choice
prompt "Target Architecture Variant"
depends on BR2_i386
@@ -341,46 +365,95 @@ 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 +467,42 @@ 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
--
1.7.11.2
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