From 921e8234ff65bd23c0b94ed568ec1fb68e47655b Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 16 Nov 2017 14:28:28 +0200
Subject: [PATCH] Add FPU specification to Architecture and GnuCompiler

---
 source/architecture.cpp | 22 +++++++++++++++++++++-
 source/architecture.h   |  2 ++
 source/gnucompiler.cpp  | 15 +++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/source/architecture.cpp b/source/architecture.cpp
index fe00338..627ba66 100644
--- a/source/architecture.cpp
+++ b/source/architecture.cpp
@@ -42,6 +42,15 @@ const char *cpus[] =
 	0
 };
 
+const char *fpus[] =
+{
+	"387",   "x86",
+	"sse",   "x86",
+	"vfpv3", "arm",
+	"neon",  "arm",
+	0
+};
+
 const char *systems[] =
 {
 	"linux",
@@ -116,6 +125,8 @@ Architecture::Architecture(Builder &b, const string &spec):
 	name = type;
 	if(!cpu.empty())
 		name += format("-%s", cpu);
+	if(!fpu.empty())
+		name += format("-%s", fpu);
 	name += format("-%d-%s", bits, system);
 
 	if(system=="windows")
@@ -149,7 +160,7 @@ bool Architecture::match_name(const string &pattern) const
 	{
 		if((*i=="32" && bits==32) || (*i=="64" && bits==64))
 			;
-		else if(*i!=type && *i!=cpu && *i!=system)
+		else if(*i!=type && *i!=cpu && *i!=fpu && *i!=system)
 			return negate;
 	}
 	return !negate;
@@ -236,6 +247,15 @@ void Architecture::parse_specification(const string &spec)
 				ok = true;
 			}
 
+		for(unsigned j=0; (!ok && fpus[j]); j+=2)
+			if(*i==fpus[j])
+			{
+				if(fpus[j+1]!=type)
+					throw invalid_argument("Conflicting FPU specification");
+				fpu = *i;
+				ok = true;
+			}
+
 		for(unsigned j=0; (!ok && systems[j]); ++j)
 			if(*i==systems[j])
 			{
diff --git a/source/architecture.h b/source/architecture.h
index 69a6ec9..1532302 100644
--- a/source/architecture.h
+++ b/source/architecture.h
@@ -26,6 +26,7 @@ private:
 	Builder &builder;
 	std::string type;
 	std::string cpu;
+	std::string fpu;
 	std::string system;
 	unsigned bits;
 	std::string name;
@@ -43,6 +44,7 @@ public:
 	const std::string &get_system() const { return system; }
 	unsigned get_bits() const { return bits; }
 	const std::string &get_cpu() const { return cpu; }
+	const std::string &get_fpu() const { return fpu; }
 	bool match_name(const std::string &) const;
 	std::string best_match(const std::list<std::string> &) const;
 	bool is_native() const { return native; }
diff --git a/source/gnucompiler.cpp b/source/gnucompiler.cpp
index 884776a..816a9a3 100644
--- a/source/gnucompiler.cpp
+++ b/source/gnucompiler.cpp
@@ -190,6 +190,21 @@ Task *GnuCompiler::run(const Target &target) const
 		argv.push_back("-march="+cpu);
 	}
 
+	if(!architecture->get_fpu().empty())
+	{
+		if(architecture->get_type()=="x86")
+		{
+			argv.push_back("-mfpmath="+architecture->get_fpu());
+			if(architecture->get_fpu()=="sse")
+				argv.push_back("-msse2");
+		}
+		else if(architecture->get_type()=="arm")
+		{
+			argv.push_back("-mfpu="+architecture->get_fpu());
+			argv.push_back("-mfloat-abi=softfp");
+		}
+	}
+
 	FS::Path obj_path = object.get_path();
 	FS::Path src_path = object.get_source().get_path();
 	FS::Path work_dir = object.get_component()->get_package().get_source_directory();
-- 
2.43.0