fp: Use forward declarations where applicable

Minimizes the amount of files that need to be rebuilt if the headers
ever change.

src/backend_x64/emit_x64_floating_point.cpp

@@ -12,7 +12,10 @@
 #include "backend_x64/emit_x64.h"
 #include "common/assert.h"
 #include "common/common_types.h"
+#include "common/fp/fpcr.h"
+#include "common/fp/fpsr.h"
 #include "common/fp/op.h"
+#include "common/fp/rounding_mode.h"
 #include "common/fp/util.h"
 #include "common/mp/cartesian_product.h"
 #include "common/mp/integer.h"

src/common/fp/op/FPRoundInt.h

@@ -7,12 +7,13 @@
 #pragma once
 
 #include "common/common_types.h"
-#include "common/fp/fpcr.h"
-#include "common/fp/fpsr.h"
-#include "common/fp/rounding_mode.h"
 
 namespace Dynarmic::FP {
 
+class FPCR;
+class FPSR;
+enum class RoundingMode;
+
 template<typename FPT>
 u64 FPRoundInt(FPT op, FPCR fpcr, RoundingMode rounding, bool exact, FPSR& fpsr);
 

src/common/fp/op/FPToFixed.h

@@ -7,12 +7,13 @@
 #pragma once
 
 #include "common/common_types.h"
-#include "common/fp/fpcr.h"
-#include "common/fp/fpsr.h"
-#include "common/fp/rounding_mode.h"
 
 namespace Dynarmic::FP {
 
+class FPCR;
+class FPSR;
+enum class RoundingMode;
+
 template<typename FPT>
 u64 FPToFixed(size_t ibits, FPT op, size_t fbits, bool unsigned_, FPCR fpcr, RoundingMode rounding, FPSR& fpsr);
 

src/common/fp/process_exception.h

@@ -6,11 +6,11 @@
 
 #pragma once
 
-#include "common/fp/fpcr.h"
-#include "common/fp/fpsr.h"
-
 namespace Dynarmic::FP {
 
+class FPCR;
+class FPSR;
+
 enum class FPExc {
     InvalidOp,
     DivideByZero,

src/common/fp/process_nan.cpp

@@ -11,6 +11,7 @@
 #include "common/fp/info.h"
 #include "common/fp/process_exception.h"
 #include "common/fp/process_nan.h"
+#include "common/fp/unpacked.h"
 
 namespace Dynarmic::FP {
 

src/common/fp/process_nan.h

@@ -6,12 +6,12 @@
 
 #pragma once
 
-#include "common/fp/fpcr.h"
-#include "common/fp/fpsr.h"
-#include "common/fp/unpacked.h"
-
 namespace Dynarmic::FP {
 
+class FPCR;
+class FPSR;
+enum class FPType;
+
 template<typename FPT>
 FPT FPProcessNaN(FPType type, FPT op, FPCR fpcr, FPSR& fpsr);
 

src/common/fp/unpacked.cpp

@@ -4,8 +4,10 @@
  * General Public License version 2 or any later version.
  */
 
+#include "common/fp/fpsr.h"
 #include "common/fp/info.h"
 #include "common/fp/process_exception.h"
+#include "common/fp/rounding_mode.h"
 #include "common/fp/unpacked.h"
 #include "common/safe_ops.h"
 

src/common/fp/unpacked.h

@@ -10,10 +10,12 @@
 
 #include "common/common_types.h"
 #include "common/fp/fpcr.h"
-#include "common/fp/fpsr.h"
 
 namespace Dynarmic::FP {
 
+class FPSR;
+enum class RoundingMode;
+
 enum class FPType {
     Nonzero,
     Zero,

src/common/fp/util.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include <boost/optional.hpp>
+#include "common/common_types.h"
 
 namespace Dynarmic::FP {
 

tests/fp/FPToFixed.cpp

@@ -9,8 +9,11 @@
 
 #include <catch.hpp>
 
+#include "common/common_types.h"
+#include "common/fp/fpcr.h"
 #include "common/fp/fpsr.h"
 #include "common/fp/op.h"
+#include "common/fp/rounding_mode.h"
 #include "rand_int.h"
 
 using namespace Dynarmic;

tests/fp/mantissa_util_tests.cpp

@@ -9,6 +9,7 @@
 
 #include <catch.hpp>
 
+#include "common/common_types.h"
 #include "common/fp/mantissa_util.h"
 #include "common/safe_ops.h"
 #include "rand_int.h"

tests/fp/unpacked_tests.cpp

@@ -4,8 +4,14 @@
  * General Public License version 2 or any later version.
  */
 
+#include <tuple>
+#include <vector>
+
 #include <catch.hpp>
 
+#include "common/common_types.h"
+#include "common/fp/fpcr.h"
+#include "common/fp/fpsr.h"
 #include "common/fp/unpacked.h"
 #include "rand_int.h"