From ce5808f572d6f25bdb3a30fddb910dbd44c53fb8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Tue, 7 Nov 2017 20:30:35 -0800
Subject: [PATCH] Moved floatFlip from bgfx to bx.

---
 include/bx/inline/math.inl | 11 +++++++++++
 include/bx/math.h          |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/include/bx/inline/math.inl b/include/bx/inline/math.inl
index 00ec324..d6b8c57 100644
--- a/include/bx/inline/math.inl
+++ b/include/bx/inline/math.inl
@@ -45,6 +45,17 @@ namespace bx
 		return u.f;
 	}
 
+	inline uint32_t floatFlip(uint32_t _value)
+	{
+		// Reference:
+		// http://archive.fo/2012.12.08-212402/http://stereopsis.com/radix.html
+		const uint32_t tmp0   = uint32_sra(_value, 31);
+		const uint32_t tmp1   = uint32_neg(tmp0);
+		const uint32_t mask   = uint32_or(tmp1, 0x80000000);
+		const uint32_t result = uint32_xor(_value, mask);
+		return result;
+	}
+
 	inline bool isNan(float _f)
 	{
 		const uint32_t tmp = floatToBits(_f) & INT32_MAX;
diff --git a/include/bx/math.h b/include/bx/math.h
index cc0ffb0..66b0a51 100644
--- a/include/bx/math.h
+++ b/include/bx/math.h
@@ -9,6 +9,7 @@
 #define BX_FPU_MATH_H_HEADER_GUARD
 
 #include "bx.h"
+#include "uint32_t.h"
 
 namespace bx
 {
@@ -61,6 +62,9 @@ namespace bx
 	///
 	double bitsToDouble(uint64_t _a);
 
+	///
+	uint32_t floatFlip(uint32_t _value);
+
 	///
 	bool isNan(float _f);