From: John Hodge <tpg@mutabah.net>
Date: Sun, 9 Mar 2014 07:28:26 +0000 (+0800)
Subject: Usermode/libm - Wrap builtin log
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=b0fc087fa1c73d0a36fd6130dbfba5e4c98ff617;p=tpg%2Facess2.git

Usermode/libm - Wrap builtin log
---

diff --git a/Usermode/Libraries/libm.so_src/include_exp/math.h b/Usermode/Libraries/libm.so_src/include_exp/math.h
index 349547ed..d6d988f2 100644
--- a/Usermode/Libraries/libm.so_src/include_exp/math.h
+++ b/Usermode/Libraries/libm.so_src/include_exp/math.h
@@ -8,6 +8,16 @@
 #ifndef _LIBM__MATH_H_
 #define _LIBM__MATH_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern double	pow(double x, double y);
+extern double	exp(double x);
+extern double	log(double val);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif
diff --git a/Usermode/Libraries/libm.so_src/pow.c b/Usermode/Libraries/libm.so_src/pow.c
index f35d7c25..d968ca89 100644
--- a/Usermode/Libraries/libm.so_src/pow.c
+++ b/Usermode/Libraries/libm.so_src/pow.c
@@ -16,3 +16,17 @@ double pow(double x, double y)
 		return 1.0f;
 	return __builtin_pow(x,y);
 }
+
+double exp(double y)
+{
+	if( y == 0.0f )
+		return 1.0f;
+	return __builtin_exp(y);
+}
+
+double log(double n)
+{
+	if(n == 1.0f)
+		return 0.0f;
+	return __builtin_log(n);
+}