MIPS: Add FPXX support to MIPS32R2

src/mips/constants-mips.h

Index: src/mips/constants-mips.h
diff --git a/src/mips/constants-mips.h b/src/mips/constants-mips.h
index 8327501b6f8d7e4ecb6d28e66e939b9c62b34889..7e0e2805904501c9181cd576223cae926c1deeb6 100644
--- a/src/mips/constants-mips.h
+++ b/src/mips/constants-mips.h
@@ -64,8 +64,12 @@ enum FpuMode {
 #elif defined(FPU_MODE_FP64)
   static const FpuMode kFpuMode = kFP64;
 #elif defined(FPU_MODE_FPXX)
+#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS32R6)
   static const FpuMode kFpuMode = kFPXX;
 #else
+#error "FPXX is supported only on Mips32R2 and Mips32R6"
+#endif
+#else
   static const FpuMode kFpuMode = kFP32;
 #endif
 
@@ -92,13 +96,9 @@ const uint32_t kHoleNanLower32Offset = 4;
 #error Unknown endianness
 #endif
 
-#ifndef FPU_MODE_FPXX
-#define IsFp64Mode() \
-  (kFpuMode == kFP64)
-#else
-#define IsFp64Mode() \
-  (CpuFeatures::IsSupported(FP64FPU))
-#endif
+#define IsFp64Mode() (kFpuMode == kFP64)
+#define IsFp32Mode() (kFpuMode == kFP32)
+#define IsFpxxMode() (kFpuMode == kFPXX)
 
 #ifndef _MIPS_ARCH_MIPS32RX
 #define IsMipsArchVariant(check) \