Revision: 16772
Author: [email protected]
Date: Tue Sep 17 13:02:25 2013 UTC
Log: Add a mechanism to override the detected cpu features.
BUG=
[email protected]
Review URL: https://codereview.chromium.org/23523060
http://code.google.com/p/v8/source/detail?r=16772
Modified:
/branches/bleeding_edge/src/arm/assembler-arm.h
/branches/bleeding_edge/src/assembler.cc
/branches/bleeding_edge/src/assembler.h
/branches/bleeding_edge/src/ia32/assembler-ia32.h
/branches/bleeding_edge/src/mips/assembler-mips.h
/branches/bleeding_edge/src/x64/assembler-x64.h
=======================================
--- /branches/bleeding_edge/src/arm/assembler-arm.h Thu Sep 12 10:37:42
2013 UTC
+++ /branches/bleeding_edge/src/arm/assembler-arm.h Tue Sep 17 13:02:25
2013 UTC
@@ -89,6 +89,7 @@
static unsigned cache_line_size_;
friend class ExternalReference;
+ friend class PlatformFeatureScope;
DISALLOW_COPY_AND_ASSIGN(CpuFeatures);
};
=======================================
--- /branches/bleeding_edge/src/assembler.cc Tue Sep 10 11:13:55 2013 UTC
+++ /branches/bleeding_edge/src/assembler.cc Tue Sep 17 13:02:25 2013 UTC
@@ -204,6 +204,26 @@
assembler_->set_enabled_cpu_features(old_enabled_);
}
#endif
+
+
+//
-----------------------------------------------------------------------------
+// Implementation of PlatformFeatureScope
+
+PlatformFeatureScope::PlatformFeatureScope(CpuFeature f)
+ : old_supported_(CpuFeatures::supported_),
+ old_found_by_runtime_probing_only_(
+ CpuFeatures::found_by_runtime_probing_only_) {
+ uint64_t mask = static_cast<uint64_t>(1) << f;
+ CpuFeatures::supported_ |= mask;
+ CpuFeatures::found_by_runtime_probing_only_ &= ~mask;
+}
+
+
+PlatformFeatureScope::~PlatformFeatureScope() {
+ CpuFeatures::supported_ = old_supported_;
+ CpuFeatures::found_by_runtime_probing_only_ =
+ old_found_by_runtime_probing_only_;
+}
//
-----------------------------------------------------------------------------
=======================================
--- /branches/bleeding_edge/src/assembler.h Thu Sep 12 10:37:42 2013 UTC
+++ /branches/bleeding_edge/src/assembler.h Tue Sep 17 13:02:25 2013 UTC
@@ -134,6 +134,19 @@
};
+// Enable a unsupported feature within a scope for cross-compiling for a
+// different CPU.
+class PlatformFeatureScope BASE_EMBEDDED {
+ public:
+ explicit PlatformFeatureScope(CpuFeature f);
+ ~PlatformFeatureScope();
+
+ private:
+ uint64_t old_supported_;
+ uint64_t old_found_by_runtime_probing_only_;
+};
+
+
//
-----------------------------------------------------------------------------
// Labels represent pc locations; they are typically jump or call targets.
// After declaration, a label can be freely used to denote known or (yet)
=======================================
--- /branches/bleeding_edge/src/ia32/assembler-ia32.h Mon Sep 9 16:57:35
2013 UTC
+++ /branches/bleeding_edge/src/ia32/assembler-ia32.h Tue Sep 17 13:02:25
2013 UTC
@@ -561,6 +561,7 @@
static uint64_t found_by_runtime_probing_only_;
friend class ExternalReference;
+ friend class PlatformFeatureScope;
DISALLOW_COPY_AND_ASSIGN(CpuFeatures);
};
=======================================
--- /branches/bleeding_edge/src/mips/assembler-mips.h Tue Aug 6 13:34:51
2013 UTC
+++ /branches/bleeding_edge/src/mips/assembler-mips.h Tue Sep 17 13:02:25
2013 UTC
@@ -426,6 +426,7 @@
static unsigned found_by_runtime_probing_only_;
friend class ExternalReference;
+ friend class PlatformFeatureScope;
DISALLOW_COPY_AND_ASSIGN(CpuFeatures);
};
=======================================
--- /branches/bleeding_edge/src/x64/assembler-x64.h Mon Aug 26 14:51:51
2013 UTC
+++ /branches/bleeding_edge/src/x64/assembler-x64.h Tue Sep 17 13:02:25
2013 UTC
@@ -504,6 +504,7 @@
static uint64_t found_by_runtime_probing_only_;
friend class ExternalReference;
+ friend class PlatformFeatureScope;
DISALLOW_COPY_AND_ASSIGN(CpuFeatures);
};
--
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