From fb90eacb808c3b1719d6a5f2deefe88c82589bfb Mon Sep 17 00:00:00 2001
From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Sat, 24 Feb 2018 13:45:25 +0800
Subject: [PATCH 3/4] disas: fix compilation failure when isnan is a macro

---
 disas/libvixl/vixl/utils.h | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/disas/libvixl/vixl/utils.h b/disas/libvixl/vixl/utils.h
index 5ab134e240..df30663df8 100644
--- a/disas/libvixl/vixl/utils.h
+++ b/disas/libvixl/vixl/utils.h
@@ -118,11 +118,17 @@ double double_pack(uint64_t sign, uint64_t exp, uint64_t mantissa);
 // An fpclassify() function for 16-bit half-precision floats.
 int float16classify(float16 value);
 
+#ifdef isnan
+#define isnan_ isnan
+#else
+#define isnan_ std::isnan
+#endif
+
 // NaN tests.
 inline bool IsSignallingNaN(double num) {
   const uint64_t kFP64QuietNaNMask = UINT64_C(0x0008000000000000);
   uint64_t raw = double_to_rawbits(num);
-  if (std::isnan(num) && ((raw & kFP64QuietNaNMask) == 0)) {
+  if (isnan_(num) && ((raw & kFP64QuietNaNMask) == 0)) {
     return true;
   }
   return false;
@@ -132,7 +138,7 @@ inline bool IsSignallingNaN(double num) {
 inline bool IsSignallingNaN(float num) {
   const uint32_t kFP32QuietNaNMask = 0x00400000;
   uint32_t raw = float_to_rawbits(num);
-  if (std::isnan(num) && ((raw & kFP32QuietNaNMask) == 0)) {
+  if (isnan_(num) && ((raw & kFP32QuietNaNMask) == 0)) {
     return true;
   }
   return false;
@@ -148,21 +154,21 @@ inline bool IsSignallingNaN(float16 num) {
 
 template <typename T>
 inline bool IsQuietNaN(T num) {
-  return std::isnan(num) && !IsSignallingNaN(num);
+  return isnan_(num) && !IsSignallingNaN(num);
 }
 
 
 // Convert the NaN in 'num' to a quiet NaN.
 inline double ToQuietNaN(double num) {
   const uint64_t kFP64QuietNaNMask = UINT64_C(0x0008000000000000);
-  VIXL_ASSERT(std::isnan(num));
+  VIXL_ASSERT(isnan_(num));
   return rawbits_to_double(double_to_rawbits(num) | kFP64QuietNaNMask);
 }
 
 
 inline float ToQuietNaN(float num) {
   const uint32_t kFP32QuietNaNMask = 0x00400000;
-  VIXL_ASSERT(std::isnan(num));
+  VIXL_ASSERT(isnan_(num));
   return rawbits_to_float(float_to_rawbits(num) | kFP32QuietNaNMask);
 }
 
